Reaction Of Metal Halides Research Articles

Crystal Structures of Three Organically Modified Metal Halides

Under the hydro(solvo)thermal conditions, the reactions of metal halides with organic N-heterocyclic molecules produced three new organically modified metal halides [tmbp][Cu2Br4] (tmbp2+ = N,N,N′,N′-tetramethyl-4,4′-bipiperidinium) 1, [H2(dmbpp)][Pb2I6] (dmbpp = dimethyl-1,3-bis(4-piperidyl)propane) 2 and [PbI2(bpp)] 3 (bpp = 1,3-bis(4-pyridyl)propane). It is noteworthy that tmbp2+ in compound 1 originated from the in situ alkylation of bp with CH3OH (bp = 4,4′-bipiperidine). The mechanism study indicates that H+ and Br− play a key role in the alkylation reaction. X-ray single-crystal diffraction analysis revealed that (i) compounds 1 and 2 are the organically templated halometallates. Both possess the 1D chain structures. The 1D chain of compound 1 can be regarded as a linear arrangement of CuBr4 tetrahedra by sharing the edges, whereas that of compound 2 can be considered as an endless extension of PbI6 octahedra by sharing the faces; (ii) compound 3 is the 1:1 adduct of PbI2 and bpp. The PbI2 chain shows a linear shape. Bpp serves as the connector, propagating the PbI2 chains into a 2D layer network of compound 3.

Syntheses and Crystal Structures of Three Supramolecular Halides: (DDTD)[Zn(N3)3Cl], (DDTD)[Hg2Br6], (DDTD)[Cd4(N3)6(Cl)8] Directed by DDTD Dication

The self-assembly reaction of metal halides with DDTD dication (DDTD = 5,8 -Diazoniadispiro[4.2.4.2] tetradecane) yielded three novel organic-inorganic hybrid mental halides (DDTD)[Zn(N3)3Cl] (1), (DDTD)[Hg2Br6] (2), and (DDTD)[Cd4(N3)6(Cl)8] (3), which are characterized by X-ray crystallography and IR spectroscopy. The crystal structures of 1–3 show that they all crystallize in monoclinic systems. Compound 1 is mononuclear complex, compound 2 is binuclear complex, and compound 3 is a tetranuclear polymer. These compounds contained a variety of inorganic frameworks, due to the different coordinated modes of metal centers with halogen, which accordingly led to the change of the C-H···Cl(Br) interactions in the complexes.

Gas-Phase Generation of Nanometer-Sized Metal Particles for Fabrication of Zero-Dimensional Quantum Structures

ABSTRACTNanometer-sized particles of Mo, Ta, Nb, and Pd were formed by gas-phase reactions of metal halides and β-diketonates in the presence of hydrogen. Particle diameters ranged from 5-100 nm depending on the reaction temperature (500-950 βC) and precursor characteristics. Gasphase particle concentrations reached 108/cm3. These particles are suitable as etching masks on semiconductor substrates for generation of zero-dimensional quantum structures.

Kinetics and mechanism of the Lewis acid-catalysed addition of alcohols to ketenes in diethyl ether solution

A kinetic study is reported of the addition of alchols to dimethyl- and diphenyl-ketene in diethyl ether solution at 25 °C in the presence of HgCl2, ZnCl2, SbCl3, and Bun2SnCl2. Except for HgCl2, which forms insoluble complexes with the reactants, the metal halides catalyse the addition to dimethylketene. The catalysed addition involves the reaction of metal halide–alcohol adducts with the ketene. In general, the stronger the adduct as a Bronsted acid, the faster is the addition of the alcohol to the ketene, although C–O, as well as C–H, bond formation is probably significant kinetically. A cyclic transition state is suggested. For diphenylketene, strongly acidic adducts transfer alcohol to the ketene so slowly that inhibition of alcoholysis is observed. Inhibition arises because the spontaneous alcoholysis is reduced as free alcohol is removed as unreactive adduct. However, weak-metal halide acids probably lead to catalysis. It is concluded (a) that the different behaviour of the two ketenes in these reactions is in keeping with their behaviour observed when they react with carboxylic acids in ether, and (b) that metal halide-catalysed alcoholysis of ketenes is generally similar to that observed with aryl isocyanates, except that tin-based catalysts are relatively more effective with isocyanates.

ChemInform Abstract: LOW TEMPERATURE DEPOSITION OF METAL NITRIDES BY THERMAL DECOMPOSITION OF ORGANOMETALLIC COMPOUNDS

AbstractDialkylamide von Ti, Zr, Nb und Ta zersetzen sich zwischen 300 und 500°C zu Nitriden, während die Dialkylamide von B, Si und Sn bei höheren Temperaturen metallische Abscheidungen liefern.

The reactions of metal halides with alkyl cyanides

The reactions of metal halides with alkyl cyanides

The Effect of Water on the Reaction of Metal Halides with Organic Acids at Higher Temperatures

AbstractEvolution of hydrogen chloirde occurs when an organic acid which tends to undergo intramolecular dehydration at elevated temperatures is heated with dried sodium chloride at 150°. Aliphatic and aromatic monocarboxylic acids are not acted upon under the same conditions. However, when mono‐ or polycarboxylic acids having a pKa<5.3, are heated with solid calcium chloride dihydrate, the above reaction takes place much more rapidly with the evolution of hydrogen chloride. Calcium chloride is also found to induce elctrophilic aromatic iodination without the presence of any oxidizing agent.

Additions and Corrections - The Reactions of Metal Halides with Acetylenic Grignard Reagents

Additions and Corrections - The Reactions of Metal Halides with Acetylenic Grignard Reagents

The Reaction of Metal Halides with Acetylenic Grignard Reagents

The Reaction of Metal Halides with Acetylenic Grignard Reagents