Co-condensation Reaction Research Articles

Highly Reactive Intermediates from the Cocondensation Reactions of Iron, Cobalt and Nickel Vapor with Arenes

AbstractIn 1969, P. L. Timms reported the first preparative cocondensation reactions of metal vapors with organic and inorganic substrates. The use of this technique in preparative chemistry soon spread rapidly, but in recent years there has been less activity in this sector. If metal atom reactions are not utilized primarily for the formation of new products, but for the synthesis of highly reactive intermediates, a new synthetic strategy may be developed. Our aims are reaction sequences which, based on an effective cocondensation reaction, lead gradually and selectively to new substance classes. This principle can be illustrated by the example of the cocondensation products of arenes and iron, cobalt, or nickel vapor, which decompose between −70 and −50°C. The classes of products accessible by this method extend from clusters, through π‐complexes, organophosphorus and organoboron cage compounds to pure organic cycloaddition products.

ChemInform Abstract: Preparation and Properties of Dioxomolybdenum Alkoxides, Phenoxide, and Siloxides Prepared by the Cocondensation Reaction of MoO3 with Alkoxy‐ or (Aryloxy)silanes.

AbstractCocondensation reaction of MoO3 with the tetraalkoxysilanes (I) leads to the products (III) with yields of 75‐80% based on MoO3.

Preparation and properties of dioxomolybdenum alkoxides, phenoxide, and siloxides prepared by the cocondensation reaction of molybdenum trioxide with alkoxy- or (aryloxy)silanes

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and properties of dioxomolybdenum alkoxides, phenoxide, and siloxides prepared by the cocondensation reaction of molybdenum trioxide with alkoxy- or (aryloxy)silanesGyu Shik Kim, David Huffman, and Carroll W. DeKockCite this: Inorg. Chem. 1989, 28, 7, 1279–1283Publication Date (Print):April 1, 1989Publication History Published online1 May 2002Published inissue 1 April 1989https://doi.org/10.1021/ic00306a015RIGHTS & PERMISSIONSArticle Views239Altmetric-Citations17LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (744 KB) Get e-Alerts Get e-Alerts

Cocondensation reaction between phosphine and fluorine: matrix infrared spectra of difluorophosphorane, difluorophosphine and fluorophosphine

Cocondensation reaction between phosphine and fluorine: matrix infrared spectra of difluorophosphorane, difluorophosphine and fluorophosphine

Synthesis and molecular structure of di-and tetra-nuclear nitrido(oxo)molybdenum(VI) compounds containing trimethylsiloxy and n-base ligands

The compounds Mo2N2(OSiMe3)6(NH3)2(1) and [Mo4N4O2(OSiMe3)8(py)4]·2py (2) prepared from a co-condensation reaction between MoO3 and (Me3Si)2NH [and also a solution synthesis for (1)] have been characterized spectroscopically and crystallographically, (pypyridine).

Determination of Mark-Houwink-Sakurada equation for phenolic resins containing alkylenediamine in the main chain and estimation of their molecular conformation in tetrahydrofuran solution

Phenolic resins containing alkylenediamine in the main chain could be prepared by the co-condensation reaction of phenol, formaldehyde and alkylenediamines such as ethylenediamine and hexamethylenediamine. The molecular structures were determined by1H-NMR spectra, IR spectra and nitrogen content. The molecular conformation of these resins in THF solution were studied from the viscosity measurements, and it became clear that the molecules were considerably compact compared with linear vinyl polymers. To clarify the reason of this phenomenon, the resins whose degrees of branching were different from each other and the resins whose phenolic hydroxyl groups were acetylated were prepared. From viscosity data, it was pointed out that the intramolecular hydrogen bonding contributes to the compaction of the phenolic resins containing alkylenediamine in the main chain more strongly than the branching does.

ChemInform Abstract: Cocondensation Reaction of Disulphurdinitride with Nickel Atoms: The Preparation of Ni(S2N2H)2.

AbstractReaction of Ni vapour (generated using a multifilament consisting of W and Ni wire) with S2N2 (II) (obtained by decomposition of S4N4 over silver wool at 300 °C) yields a dark solid (III) from which, after extraction with MeOH, the known complex (IV) is obtained.

Cocondensation reaction of disulphurdinitride with nickel atoms: The preparation of Ni(S2N2H)2

The utility of metal atom vapour synthesis in the preparation of metalla-sulphur-nitrogen compounds has been investigated. Reaction of nickel atoms with disulphurdinitride, S2N2, gave, after extraction with methanol, Ni(S2N2H)2 in ca 15% yield.

The generality of metal atom-free radical reactions and synthesis of new trifluoromethylalkyls of gold(III) and silver

The cocondensation reaction of trifluoromethyl radicals with gold and silver vapors is an effective and efficient synthesis for the new compounds, Au(CF 3) 3 and AgCF 3. Addition of trimethylphosphine to these alkyls yielded the room temperature stable compounds, Au(CF 3) 3PMe 3 and AgCF 3(PMe 3).

Mise en évidence par spectroscopie infrarouge des espèces Ni(PH 3) n( n = 1–4) Isolées en matrice

Ni(PH 3) n species (where n = 1–4) were obtained by a co-condensation reaction of nickel vapour with phosphine, and stabilized at a low temperature in argon matrices. Infrared spectra in the Ni-P stretching vibration region provided evidence for their formation. Solid Ni(PH 3) 4 was isolated after removal of excess PH 3.

Direct synthesis using copper vapour: A route to novel binary ethylene complexes of zerovalent copper, (C2 H4)nCu (where n = 1, 2 OR 3)

The cocondensation reaction of Cu atoms with pure C2H4 and C2H4/Ar mixtures at 10 K is shown by matrix infrared spectroscopy to lead to the first well-characterized examples of binary zerovalent copper — ethylene complexes, (C2H4)nCu (where n = 1, 2 or 3).

"Sideways" Bonded Dinitrogen in Matrix Isolated Cobalt Dinitrogen, CoN2

Infrared spectra are reported for matrix isolated cobalt dinitrogen isotopic species, Co14N2, Co14N15N and Co15N2, formed in the cocondensation reaction of atomic cobalt with dilute nitrogen–argon matrices at 10°K. The data provide the first unambiguous spectroscopic evidence for a dinitrogen molecule bonded in a "sideways" fashion to a transition metal atom.

Intermediate Binary Carbonyls of Palladium Pd(CO)n where n = 1–3; Preparation, Identification, and Diffusion Kinetics by Matrix Isolation Infrared Spectroscopy

The co-condensation reaction of atomic palladium with a dilute CO–argon mixture (1:1000) at 10°K yields intermediate carbonyls of palladium Pd(CO)n where n = 1–3 as well as very small amounts of Pd(CO)4. Isotopic substitution experiments using 12C18O were used to aid the spectral assignments. The probabilities of forming the various Pd(CO)n carbonyl species as a function of the CO concentration in Ar are analyzed and compared with the experimental observations. An analysis of the diffusion kinetics demonstrates their usefulness in assigning bands to various species in a series of compounds such as Pd(CO)n. The data make possible the assignment of infrared absorptions at 2070, 2060, 2044, and 2050 cm−1 to tetrahedral (Td) Pd(CO)4, trigonal planar (D3h) Pd(CO)3, linear (D∞h) Pd(CO)2 and linear (C∞v) PdCO, respectively. Cotton–Kraihanzel force constants are calculated for Pd(CO)n and are compared with those for the analogous intermediate carbonyls of nickel, Ni(CO)n.

Binary Dioxygen Complexes of Nickel; Infrared Spectroscopic Evidence for Ni(O2) and (O2)Ni(O2) in Low Temperature Matrices

The cocondensation reaction of nickel atoms with oxygen or dilute oxygen–argon matrices at 4.2–10 °K gives rise to the first examples of binary transition metal dioxygen complexes. Variable concentration and diffusion controlled warm up studies and 16O2, 16O18O, 18O2 isotope substitution studies establish the stoichiometries of the dioxygen complexes of nickel to be Ni(O2) and (O2)Ni(O2). Both complexes have the dioxygen molecule(s) coordinated to the nickel atom in a "sideways" fashion.

Matrix isolation laser Raman spectroscopy: a Raman and infrared spectral study including Raman polarisation data for the co-condensation reaction of Pd: Spectroscopic and structural data for the new tetra-carbonyls Pd(CO) 4 AND Pt(CO) 4

The chemical species formed in the co-condensation reactions of Pd and Pt atoms with CO at 4.2–10 °K are investigated for the first time using the combined techniques of matrix isolation infrared and laser Raman spectroscopy. Under these experimental conditions the spectroscopic data show that one major product is formed. The data when taken in conjunction with the depolarisation measurements for the matrix isolated species confirms the existence in the matrix of the previously unknown tetracarbonyls Pd(CO) 4 and Pt(CO) 4 both having T d symmetry. Cotton-Kraihanzel force constants are calculated for the series M(CO) 4 where M = Ni, Pd and Pt.

Cocondensation reaction of difluorosilene with diborane. New polyfluoropolysilanes

Abstract : The cocondensation reaction of S1F2 with B2H6 at a -196C surface gives a product which, by low-temperature evaporation in vacuo, yields nonvolatiles and diborane derivatives of the 1,1-fluorosilylated type, possibly of the heterocyclic class 1,1-(Sif2)(n)B2H4. These decompose very easily at low temperatures (possibly autocatalytically) to form nonvolatiles and polyfluoropolysilanes; such products also come from the original cocondensation reaction. They include the known compounds SiF4, HSiF3, (SiF3)2O, Si2F6, HSi2F5, and Si3F8, and the new compounds H3SiSiF3, H2Si(SiF3)2, probably HSi(SiF3)3 and Si(SiF3)4 (neither very stable), a somewhat unstable H(SiF2)2SiF3, and other volatiles which are more difficult to identify. (Author)

Matrix Raman spectroscopy; The lithium atom-oxygen molecule cocondensation reaction

The recently developed matrix isolation laser Raman technique is applied to the study of lithium superoxide which is the major product of the cocondensation reaction of an atomic beam of lithium with a jet of molecular oxygen at 4.2–15°K.