Nickel Carbonyl Research Articles

Ground and Low‐Lying Excited States of Nickel Monocarbonyl Obtained by Anion Photoelectron Velocity Map Imaging Spectroscopy

The photodetachment of nickel monocarbonyl anion was investigated with photoelectron velocity map imaging spectroscopy and analyzed using existing and new theoretical calculations. The photodetachment experiment conducted at three detachment photon energies (i.e. 1064, 532, and 355 nm) revealed a wealth of spectroscopic information about both the ground state and low‐lying excited states of NiCO. Franck‐Condon simulations were performed to assist the spectral assignment of the vibrationally resolved ground‐state transition. The electron affinity of NiCO is measured to be 0.775 ± 0.002 eV. Three stretching vibrational modes were determined to be activated upon photodetachment, with frequencies of 2016 ± 100, 597 ± 10, and 564 ± 10 cm−1. The higher‐energy electronic transitions were divided into two congested spectral bands, falling in the ranges of 1.8~2.8 and 2.8~3.5 eV, respectively. The current VMI provided valuable benchmark data for the theoretical calculations on the nickel carbonyls.

A decarbonylative approach to alkylnickel intermediates and C(sp3)-C(sp3) bond formation.

The myriad nickel-catalyzed cross-coupling reactions rely on the formation of an organonickel intermediate, but limitations in forming monoalkylnickel species have limited options for C(sp3) cross-coupling. The formation of monoalkylnickel(II) species from abundant carboxylic acid esters would be valuable, but carboxylic acid derivatives are primarily decarboxylated to form alkyl radicals that lack the correct reactivity. In this work, we disclose a facile oxidative addition and decarbonylation sequence that forms monoalkylnickel(II) intermediates through a nonradical process. The key ligand, bis(4-methylpyrazole)pyridine, accelerates decarbonylation, stabilizes the alkylnickel(II) intermediate, and destabilizes off-cycle nickel(0) carbonyl species. The utility of this new reactivity in C(sp3)-C(sp3) bond formation is demonstrated in a reaction that is challenging by purely radical methods-the selective cross-coupling of primary carboxylic acid esters with primary alkyl iodides.

Evolution of Pore Structure in Compacts Produced from Nickel Carbonyl Powders during Sintering

Evolution of Pore Structure in Compacts Produced from Nickel Carbonyl Powders during Sintering

Frozen Natural Orbitals for the State-Averaged Driven Similarity Renormalization Group.

We present a reduced-cost implementation of the state-averaged driven similarity renormalization group (SA-DSRG) based on the frozen natural orbital (FNO) approach. The natural orbitals (NOs) are obtained by diagonalizing the one-body reduced density matrix from SA-DSRG second-order perturbation theory (SA-DSRG-PT2). We consider three criteria to truncate the virtual NOs for the subsequent electron correlation treatment beyond SA-DSRG-PT2. An additive second-order correction is applied to the SA-DSRG Hamiltonian to reintroduce correlation effects from the discarded orbitals. The FNO SA-DSRG method is benchmarked on 35 small organic molecules in the QUEST database. When keeping 98-99% of the cumulative occupation numbers, the mean absolute error in the vertical transition energies due to FNO is less than 0.01 eV. Using the same FNO threshold, we observe a speedup of 9 times compared to the conventional SA-DSRG implementation for nickel carbonyl with a quadruple-ζ basis set. The FNO approach enables nonperturbative SA-DSRG computations on chloroiron corrole [FeCl(C19H11N4)] with more than 1000 basis functions, surpassing the current limit of a conventional implementation.

Organotransition Metal Chemistry of Terpenes: Syntheses, Structures, Reactivity and Molecular Rearrangements.

The impact of organometallic chemistry on the terpene field only really blossomed in the 1960s and 1970s with the realisation that carbon-carbon bond formation under mild conditions could be achieved by using nickel or iron carbonyls as synthetic reagents. Concomitantly, the development of palladium derivatives capable of the controlled coupling of isoprene units attracted the attention of numerous highly talented researchers, including future Nobel laureates. We discuss briefly how early work on the syntheses of simple monoterpenes soon progressed to sesquiterpenes and diterpenes of increasing complexity, such as humulene, flexibilene, vitamin A, or pheromones of commercial value, in particular those used in perfumery (muscone, lavandulol), or grandisol and red scale pheromone as replacements for harmful pesticides. As the field progressed, there has been more emphasis on developing organometallic routes to enantiopure rather than racemic products, as well as gaining precise mechanistic data on the transformations, notably the course of metal-promoted molecular rearrangements that have long been a feature of terpene chemistry. We note the impact of the enormously enhanced analytical techniques, high-field NMR spectroscopy and X-ray crystallography, and their use to re-examine the originally proposed structures of terpenes and their organometallic derivatives. Finally, we highlight the very recent ground-breaking use of the crystalline sponge method to acquire structural data on low-melting or volatile terpenes. The literature cited herein covers the period 1959 to 2023.

Reactivity of low-valent nickel carbonyl species supported by acridane based PNP ligands towards iodoalkanes.

Nickel monocarbonyl species with Ni(I) and Ni(0) have been synthesized and fully characterized by employing an acriPNP-Ph pincer ligand having a -C(Ph)2- bridge moiety to tether two aromatic rings. To see the effect of the bridge moiety, these complexes were structurally compared with the previously studied nickel complexes supported by PNP and acriPNP-Me ligands and methylation of the nickel carbonyl species was particularly investigated. Since a Ni(I)-CO species is known to be one of the key intermediates during the C-C coupling reaction to give an acetyl species, according to the paramagnetic mechanism of acetyl coenzyme A synthase (ACS), their reactivity toward MeI has been examined. Methylation of a nickel(I)-CO species reveals enhanced C-C coupling when both acriPNP-Me and acriPNP-Ph ligands were used. According to spin density analysis calculated by density functional theory, all Ni(I)-CO species reveal similar spin density at nickel and the carbon atom of CO. X-ray crystallographic data suggest that the corresponding selectivity may be related to the steric influence. For both (acriPNP-Ph)Ni-CO (2) and (acriPNP-Me)Ni-CO (2'), the nickel(I) site is sterically well protected, leading to selective interaction with a methyl radical to give a nickel acyl product. Steric influence was marginally observed when an anionic {(acriPNP-R)Ni-CO}- (R = Me or Ph) species reacted with MeI. The corresponding C-C coupled product was also observed from the methylation of nickel(0)-CO species.

Site-targeted decoration of palladium nanocrystals for catalytic CH4 removal in lean-burn exhaust.

Site-targeted decoration of catalytic nanocrystals is essential for maximizing performance with minimal materials use. Here, we demonstrate successful, site-targeted decoration of palladium (Pd) nanocrystals with nickel (Ni) exclusively along crystal facet edges through the thermal decomposition of nickel carbonyl (Ni(CO)4) vapor. Strong interactions between carbon monoxide and Pd facet for passivation or between Ni(CO)4 and crystal facet edges resulted in selective Ni decoration at the nanocrystal edges. The Ni-decorated Pd nanocrystals exhibit superior catalytic performance for methane (CH4) removal in an oxygen-rich lean-burn exhaust atmosphere, requiring 10 times less Ni decoration than conventional Pd-Ni composite catalysts prepared by the wet impregnation method. The site-targeted decoration of nanocrystals introduced in this work offers an efficient and resource-minimizing strategy for enhanced catalytic applications.

Nickel-Catalyzed Highly Selective Reductive Carbonylation Using Oxalyl Chloride as the Carbonyl Source

Nickel-catalyzed carbonylative cross-electrophile coupling which emerges as a powerful, efficient, and low-cost method for constructing challenging carbonyl derivatives has attracted increasing attention of organic chemists. To avoid the generation of a poisonous, volatile, and inert nickel carbonyl complex, it is critical to develop an efficient, cheap, and easily available CO surrogate. Oxalyl chloride, a cheap commercially available chemical, is one of the most versatile organic reagents used in chemical reactions. In this work, high chemoselectivity can be achieved with a 1:1:1 ratio of Ar–I to alkyl-I to oxalyl chloride. A wide range of alkyl aryl ketones which present an important class of molecules in synthetic and medicinal chemistry are accessed from alkyl halides, aryl iodides, under mild conditions. Primary and secondary alkyl iodides were suitable substrates. Various functional groups were well tolerated, affording up to 90% yields. This protocol was also used in the derivatization of natural products and drug molecules. Mechanistic investigation indicates that the reaction of Zn and oxalyl chloride under mild reaction conditions could release CO slowly. This knowledge should be useful for the further development of multicomponent carbonylative cross-coupling reactions.

State of charge effects on active material elemental composition changes between pre-thermal-runaway and post-failure states for 8-1-1 nickel-manganese-cobalt 18650 cells

Lithium-ion battery failures have presented challenges to fire forensic investigators in determining in what scenarios they may have been able to initiate a fire, and what post-failure signatures exist to determine if the battery was more likely the cause or a victim of the fire. A battery's ability to initiate a fire depends on its state-of-charge (SOC) which influences a failed cell's energy output and capacity to ignite fuel contents. Knowing a failed battery's pre-failure SOC is thus of great interest in battery failure forensics in helping analyze whether it is the cause or a victim of a fire. To determine the pre-failure SOC of burned batteries, a simple and repeatable technique is needed to analyze burned batteries and provide insight on the possible pre-failure SOC. This paper introduces a technique that deduces the pre-failure SOC based on the elemental composition of 8-1-1 NMC Li-ion batteries before and after thermal runaway at different SOCs. The composition-SOC correlation was determined by (1) acquiring a baseline composition from the Nickel-Manganese-Cobalt (NMC) cathode material in a pristine 18650 cell, (2) triggering thermal runaway of 18650 cells (by overheating) at different SOCs and collecting burned electrodes, (3) performing chemical analysis using scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) to obtain post-failure composition, and (4) examining elemental composition variation with respect to SOC. In addition to characterizing the burned contents inside, the ejected (gas and solid) contents during thermal runaway were also collected in a sealed pressure vessel chamber and analyzed to explain the mechanistic background behind the observed variation. The ejected solids were analyzed using SEM-EDS, and the ejected gases were analyzed using gas chromatography (GC) and gas detection tubes. The results show that as the SOC increases, the Ni/Mn and Co/Mn ratios after thermal runaway decrease from the atomic ratios in the pristine condition. Test repetition at each SOC produced an uncertainty in the Ni/Mn ratios of less than 10 % in the 30–70 % SOC tests and less than 20 % in the 100 % SOC tests for externally heated cells, and less than 10 % in the 30 % SOC tests and less than 25 % in the 50–100 % SOC tests for internally heated cells. Ni/Co ratio does not vary significantly with respect to the SOC, suggesting that nickel and cobalt are lost from the electrode at a faster rate than manganese, with nickel being lost slightly faster than cobalt. The pressure vessel test conducted with 100 % SOC cells has also been found to contain nickel carbonyl in the inert test chamber after thermal runaway, which may be a product of nickel reactions in the electrode. Overall, this paper introduces a practical approach to determine a NMC (8,1,1) Li-ion battery's SOC according to the elemental composition collected from its debris after a failure event. The approach is based on the correlation between SOC and Ni-Mn-Co ratios and supported by the theoretical reaction kinetics of NMC cathode materials during thermal runaway, as evidenced by the identified Ni-containing products.

Intervention effects of drugs on GSH and SOD enzyme activity of rats kidney acutely poisoned by nickel carbonyl

Objective: To evaluate the intervention effect of various drugs on glutathione (GSH) and superoxide dismutase (SOD) enzyme activity of rats kidney with acute nickel carbonyl poisoning. Methods: In January 2019, The 250 SPF male SD rats were randomly divided into normal control group (n=10) , poisoned group (n=40) and treatment groups (n=200) according to the random number table method. And the treatment groups were divided into methylprednisolone group (20 mg/kg) , DDC group (100 mg/kg) , sodium selenite group (10 μmol/kg) , Shenfu huiyang decoction group (0.25 ml) and methylprednisolone combined with DDC group (100 mg/kg) , with 40 mice in each group. Except for the normal control group, rats in the other groups were exposed to nickel carbonyl for 30 min, at 4 h and 30 h after exposure, the rats in each treatment group were intraperitoneally injected with corresponding drugs, and kidney tissues were collected 3 d and 7 d after administration, with 10 mice in each group. The activities of GSH and SOD in kidney were measured by enzyme-linked immunosorbent assay, and using electron microscopy observe ultrastructure changes. Results: Compared to the control group, the activities of GSH and SOD enzyme of poisoned group were significantly decreased at 3 d or 7 d after 4 h or 30 h exposure, and the difference was statistically significant (P=0.000, 0.031, 0.001, 0.033) , the epithelial nuclei of proximal convoluted tubules were pyknosis and lysosome hyperplasia in the cytoplasm. And compared to poisoned group, the activities of GSH and SOD enzyme of methylprednisolone+DDC group were significantly increased at treatment with 7 d after 4 h exposure, the difference was statistically significant (P=0.022, 0.000) , and the activities of GSH and SOD enzyme of methylprednisolone and enzyme of methylprednisolone+DDC group were significantly higher at 7 days than at 3 days, the difference was statistically significant (P=0.020, 0.017, 0.018, 0.033) . The results of electron microscopy showed that the cell nuclei and cytoplasmic organelles of proximal convolute tubule were almost restored to normal tissue level of both methylprednisolone group and methylprednisolone+DDC group. Conclusion: The methylprednisolone and methylprednisolone+DDC have obvious repair effect on renal enzyme activity level of rats with acute nickel carbonyl poisoning, and the treatment effect is better for a long time of medication.

Health risks from exposure to chemicals in Arctic enterprises

Introduction. Chemicals of various hazard classes are among the most common harmful production factors. We aimed to study conditions for the occurrence, prevalence and structure of occupational diseases from exposure to chemicals at enterprises in the Arctic in order to exclude cases of early restriction or complete termination of the labour activity of workers. The study design was to analyze data of social and hygienic monitoring “Working conditions and occupational morbidity of the population” in the Russian Federation in 2007-2020. Materials and methods. We studied the data of social and hygienic monitoring “Working conditions and occupational morbidity of the population of the Russian Federation” in 2007-2020. Results. In the Russian Arctic in 2007-2020, the share of chemicals in the structure of harmful production factors was 7.6%. They were the cause of 7.8% of occupational diseases, the number of which tended to decrease. Characteristic for this group of diseases is the predominant damage to the respiratory organs (74.6%) in workers in the nickel industry (68.3%). Also, a feature of the diseases was the formation in a shorter time (24.3±0.4 years); greater risk in women (relative risk (RR) = 3.48, confidence interval (CI) 2.91-4.16; p<0.001); greater risk of malignancy (RR=3.55; CI 3.13-4.02; p<0.001). Out of five hundred seventy one case of occupational pathology of nickel production workers, 355 (62.2%) were caused by water-insoluble nickel compounds. Other 188 (32.9%) and 28 (4.9%) cases were due to hydroaerosols of nickel salts and nickel tetracarbonyl, respectively. Out of 164 cases of intoxication, 138 (84.1%) had a chronic course and were mainly caused by nickel compounds (87.7%). The main cause of acute intoxication (n=26) was carbon monoxide (76.9%). Limitations. Methods for determining concentrations of chemicals in the air of work areas do not provide an accurate exposure assessment in workers who use personal protective equipment. Conclusion. To reduce the occupational health risks from chemicals, first of all, it is necessary, to decrease concentrations of nickel compounds in the air of the nickel enterprise working areas. In the prevention of certain forms of occupational pathology, priority should be given to respiratory diseases from exposure to water-insoluble nickel compounds, malignant neoplasms and acute carbon monoxide poisoning.

EFFECTS OF NICKEL TOXICITY ON VARIOUS ORGANS OF THE Swiss albino MICE

Nickel was discovered by A. F. Cronstedt in 1754 and is a bountiful metal in the Earth's outside layer, it is the 24th most plentiful element and 28th component of the periodic table. It is a silver-white metal found in a few oxidation states (going from - 1 to +4); nonetheless, the +2 oxidation state [Ni (II)] is the most widely recognized one in natural systems. Nickel is famous as a haematotoxic, immunotoxic, neurotoxic, genotoxic, regenerative harmful, aspiratory poisonous, nephrotoxic, hepatotoxic, and cancer-causing operator. The mass number of nickel (Ni) is 58.71 and the atomic number of Nickel is 28 just as the thickness is 8.9g/cm3 and the softening point is 1453°C and the edge of boiling over is 2732°C. Nickel (Ni) is silver-white pliable metal. In the living cells of plants, animals, and humans, minor components have a significant influence on synthetic, organic, biochemical, metabolic, catabolic, and enzymatic actions. Nickel (Ni), an occurring element, is found in a variety of environments, including soil, water, and air. Many industrial and commercial applications for Ni compounds and metallic Ni exist, including alloy manufacture, luster, nickel-cadmium batteries, and catalytic agent in the chemical and foodstuff industries. Acute and intense toxicity in mammals resulting from assimilation by consumption through lungs or gastro-intestinal tract was mainly reported. Nickel carbonyl ingestion produces two types of acute venomous effects. Nickel produces the variation of the (p53 gene), which is a transcription factor and crucial tumor suppressor gene, in epithelial cells of the kidney. The removal of sewage and industrial is a significant issue. It is oftentimes drained to agricultural regions, where it is used to develop yields like vegetables. Heavy metal pollution in wastewater water systems represents various dangers to the climate. . Most vegetables have contained a large number of organic compounds that are role-playing in cell reinforcement. The significant cell reinforcements in vegetables are phenolic acids, flavonoids, α-tocopherol, β-carotene, lutein, and ascorbic destructive. Although in different nourishments like grains, nuts and a few types of meat, chicken meat and fish.

Ultrafast infrared transient absorption spectroscopy of gas-phase Ni(CO)4 photodissociation at 261 nm.

We employ ultrafast mid-infrared transient absorption spectroscopy to probe the rapid loss of carbonyl ligands from gas-phase nickel tetracarbonyl following ultraviolet photoexcitation at 261nm. Here, nickel tetracarbonyl undergoes prompt dissociation to produce nickel tricarbonyl in a singlet excited state; this electronically excited tricarbonyl loses another CO group over tens of picoseconds. Our results also suggest the presence of a parallel, concerted dissociation mechanism to produce nickel dicarbonyl in a triplet excited state, which likely dissociates to nickel monocarbonyl. Mechanisms for the formation of these photoproducts in multiple electronic excited states are theoretically predicted with one-dimensional cuts through the potential energy surfaces and computation of spin-orbit coupling constants using equation of motion coupled cluster methods (EOM-CC) and coupled cluster theory with single and double excitations (CCSD). Bond dissociation energies are calculated with CCSD, and anharmonic frequencies of ground and excited state species are computed using density functional theory (DFT) and time-dependent density functional theory (TD-DFT).

Сучасні отруйні речовини як терористична загроза суспільству

Застосування отруйних речовин у сучасній практиці з диверсійною метою створює значну терористичну загрозу для усього суспільства на сьогодні. Спеціальні лабораторії, де розробляються отруйні речовини для спецслужб, останніми роками працюють в напрямку посилення впливу отрут на органи і системи людини, а також на приховування їх слідів в організмі об’єкта отруєння. У той же час клініка отруєння має бути схожою на клініку гострої серцево-судинної недостатності, респіраторних вірусних інфекцій із вираженим інтоксикаційним синдромом і набряком легень для приховування слідів злочинів. Зоотоксинологія, фітотоксинологія та токсинологія мікроорганізмів — основні розділи токсинології, що вивчають токсичний процес внаслідок ураження відповідно отрутами (токсинами) тварин, рослин і збудників інфекційних захворювань, хімічну природу цих отрут, їх токсикокінетику і токсикодинаміку. Найтоксичнішими отруйними речовинами в сучасній токсинології вважаються рослинні алкалоїди та ряд важких металів і їх сполук. У даній статті розкриваються актуальні питання щодо клінічних і патогенетичних особливостей отруєння такими речовинами, як рицин, діоксин, пентакарбоніл заліза, карбоніл нікелю аконітин, анізатин, абрин та полоній-210. У статті, окрім деталізації фізико-хімічних, токсикологічних і клінічних властивостей, наведені також деякі історичні відомості щодо отруєння цими речовинами, які нещодавно мали місце у скоєнні диверсій у ряді країн світу. Слід зазначити, що в даний час для визначення дуже малих кількостей отруйних речовин широко застосовують такі лабораторні методи, як емісійний спектральний аналіз, атомна абсорбційна спектроскопія, полярографія, різні види хроматографії, активаційний аналіз. Оскільки з кожним роком у світі спостерігається зростання різновидів отруйних речовин, подальше вивчення будови, фізико-хімічних і токсикологічних властивостей, а також впливу на організм ряду диверсійних отрут має важливе значення для медицини в цілому. Мета: вивчити властивості і вплив сучасних отруйних речовин на організм людини, що можуть бути використані в диверсійних цілях.

Layered double (Ni, Fe) hydroxide grown on nickel foam and modified by nickel carbonyl powder and carbon black as an efficient electrode for water splitting

Developing novel oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) catalysts is vital for water splitting. Here, carbon black (CB) and nickel carbonyl powder (NCP) are used as components, and the nonionic surfactant polyvinyl pyrrolidone (PVP) is used as a shape-controlled capping agent to easily prepare layered double (Ni, Fe) hydroxide (NiFe-LDH) electrodes. Scanning electron microscopy observation and X-ray photoelectron spectra analysis show that the Fe2+-doped layered double hydroxide is grown in situ on nickel foam (NF). CB (XC-72) and NCP further improve the electrical conductivity. At 10 mA•cm−2, the overpotentials of the OER and HER are 203 mV and 83 mV, respectively, in 1 M KOH. Only 1.48 V is needed when both electrodes are applied for water splitting, and it has a stability of more than 100 h. This work can be used as a medium to elevate the OER and HER performance of NiFe-LDH-based catalysts.

Analysis of biomonitoring data to assess employer compliance with OSHA's permissible exposure limits for air contaminants.

The Occupational Safety and Health Administration (OSHA) regulates exposures to hazardous chemicals in workplace air. When contemporaneous exposure measurements are unavailable, retrospective analysis of biomarkers could provide valuable information about workers' exposures. Single-compartment pharmacokinetic (PK) models were created to relate the concentration of a chemical in the air to the concentration of the chemical or its metabolite in workers' blood or urine. OSHA utilized the PK models in investigations of three fatal incidents in which workers were exposed to nickel carbonyl, methyl bromide, or styrene. To obtain the minimum plausible estimate of each exposure, OSHA used conservative assumptions about parameters such as workers' inhalation rates, baseline levels of biomarker, and chemicals' volumes of distribution. OSHA analyzed a worker's urinary nickel concentration and concluded that his 8-htime-weighted average exposure to nickel carbonyl was at least 0.06 mg/m3 . Analysis of a worker's postexposure, premortem blood bromide level revealed that his exposure to methyl bromide was at least 181 mg/m3 . Post-mortem blood styrene measurements suggested that a third worker's exposure to styrene was at least 625 mg/m3 . These exposures exceeded OSHA's permissible exposure limits of 0.007 mg/m3 for nickel carbonyl, 80 mg/m3 for methyl bromide, and 426 mg/m3 for styrene. OSHA successfully cited the three employers for violations of chemical exposure limits. Analysis of biomarkers via PK modeling enables retrospective evaluations of workers' acute exposures to hazardous chemicals. These techniques are useful to occupational regulators who assess employer compliance with mandatory exposure limits.

Deep hydroconversion of ethanol-soluble portion from the ethanolysis of Hecaogou subbituminous coal to ultra-clean liquid fuel over hierarchical porous zeolite Y supported Ni–Co nanoparticles

A hierarchical porous zeolite Y (HPZY) supported Ni–Co catalyst was prepared by pyrolyzing nickel tetracarbonyl and using modified deposition-precipitation to highly disperse Ni–Co nanoparticles onto HPZY. Hecaogou subbituminous coal was effectively ethanolyzed to obtain ethanol-soluble portion (ESPE) in a high yield (21.2%). Sequentially, ESPE was subjected to the deep hydroconversion (DHC) over prepared Ni10%-Co3%/HPZY at 150 °C under 4 MPa of initial hydrogen pressure for 24 h in n-heptane to produce deeply hydroconverted ethanol-soluble portion (ESPDHC). All the group components in ESPE, including arenes (53.3%), oxygen-containing organic compounds (24.4%), and nitrogen-containing aromatics (2.3%) were completely converted to chain alkanes (CAs, 36.8%), cyclanes (39.2%), and hydroarenes (24.0%). In addition, the hydroisomerization of CAs and hydroreforming of aromatic rings (ARs) in ESPDHC are predominant over Ni10%-Co3%/HPZY with more accessibility of active sites under mild conditions. Ni10%-Co3%/HPZY with suitable acidity and highly dispersed Ni–Co nanoparticles can effectively activate H2 to H⋯H and further heterogeneously split H⋯H to H+ and H−. H⋯H and H+ transfer plays crucial roles in the DHC of ESPE. Correspondingly, the related mechanisms are evidenced by the DHC of 2,2′-oxydinaphthalene (ODN) over Ni–Co/HPZY. Ni10%-Co3%/HPZY maintains high activity for the DHC of ODN under mild conditions after 4 recycles.

Frontispiz: Chasing the Mond Cation: Synthesis and Characterization of the Homoleptic Nickel Tetracarbonyl Cation and its Tricarbonyl‐Nitrosyl Analogue

Koordinationsverbindungen In ihrer Zuschrift auf S. 14926 berichten Ingo Krossing et al. über die Synthese des ersten homoleptischen Nickelcarbonyl-Kations [Ni(CO)4]·+ und des Nickel-Tricarbonyl-Nitrosyl-Kations [Ni(CO)3(NO)]+ in der kondensierten Phase.

Frontispiece: Chasing the Mond Cation: Synthesis and Characterization of the Homoleptic Nickel Tetracarbonyl Cation and its Tricarbonyl‐Nitrosyl Analogue

Coordination Complexes In their Communication on page 14800, Ingo Krossing et al. report the synthesis of the first homoleptic nickel carbonyl cation [Ni(CO)4]·+ and the nickel tricarbonyl-nitrosyl cation [Ni(CO)3(NO)]+ in the condensed phase.

The elasticity of the polymeric composite material with orthotropic structure

The preparation of orthotropic polymeric composite is described. Method is based on curing the epoxy resin with nickel carbonyl nanoparticles (the content up to 35 vol.%) directly in the magnetic field B ≈ 0.2 T. The noticeable anisotropy of composite elastic properties is proved by the measurements of Yung's modulus of the disk and plate-shaped samples.