Transition metal nitride complexes

In this section a collection of the various metal nitrides that have been reported are arranged by metal. The abbreviations employed for the various ligands can be found in Chart 1. 

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The conversion of coordinated NSCI into a nitrido ligand provides a useful synthesis of transition-metal nitrides. For example, treatment of ReCl4(NSCl)(POCl3) with triphenylphosphine generates the nitrido complex ReNClaCPPhsla. "... 

This review has focused on the various methods that have been reported for the synthesis of metal nitride complexes, as well as even larger number of metal nitrides that have been isolated for a wide range of transition metals throughout the periodic table. It is clear that these complexes have an intriguing array of reactivity and structure. There is a burgeoning field of study that has demonstrated that these complexes already display a host of desirable properties in materials science, medicine, and chemical synthesis. Further investigations of the structure and reactivity of metal nitrides complexes will undoubtedly yield important contributions in the evolution of this exciting field. 

Carbonyl Complexes of the Transition Metals Nitrides Transition Metal Solid-state Chemistry Oxygen Inorganic Chemistry Short-hved Intermediates. 

LijN BejNj MgsN2 CajNj etc. Transition-metal nitrides Interstitial and more complex structures HgaNj BN AIN GaN InN Si3N4 Ge3N4 Molecular nitrides of non-metals... 

The complex nature of the bonding structure in transition metal nitrides incorporates a mixture of covalent, metallic and ionic components [126]. The nature on this bonding leads to high hardness, chemical inertness and, good electrical conductivity of these mixed nitride thin films. In what follows, we describe the surface chemical alteration of both a control and oxidized Ti—Al—N films (i.e., two different types of deposition room temperature (A) and liquid N2 temperature (B)), by measuring the chemical shifts in the Ti (2p), Al (2p), O (Is) and N (Is) XPS spectra. 

Chouzier, S., Afanasiev, R, Vrinat, M. et al. (2006) One step synthesis of dispersed bimetallic carbides and nitrides from transition metals hexamethylenetetramine complexes. 7. Solid State Chem., 179 (11), 3314-3323. 

Unlike nitric oxide, NO, the monomeric radical sulfur nitride, NS, is only known as a short-lived intermediate in the gas phase. Nevertheless the properties of this important diatomic molecule have been thoroughly investigated by a variety of spectroscopic and other physical techniques (Section 5.2.1). The NS molecule is stabilized by coordination to a transition metal and a large number of complexes, primarily with metals from Groups 6, 7, 8 and 9, are known. Several detailed reviews of the topic have been published. ... 

A variety of routes is available for the preparation of metal-thionitrosyl complexes. The most common of these are (a) reaction of nitride complexes with a sulfur source, e.g., elemental sulfur, propylene sulfide or sulfur halides, (b) reaction of (NSC1)3 with transition-metal complexes, and (c) reaction of [SN]" salts with transition-metal complexes. An example of each of these approaches is given in Eq. 7.1,... 

Several patents dealing with the use of volatile metal amidinate complexes in MOCVD or ALD processes have appeared in the literature.The use of volatile amidinato complexes of Al, Ga, and In in the chemical vapor deposition of the respective nitrides has been reported. For example, [PhC(NPh)2]2GaMe was prepared in 68% yield from GaMes and N,N -diphenylbenzamidine in toluene. Various samples of this and related complexes could be heated to 600 °C in N2 to give GaN. A series of homoleptic metal amidinates of the general type [MIRCfNROilnl (R = Me, Bu R = Pr, BuO has been prepared for the transition metals Ti, V, Mn, Fe, Co, Ni, Cu, Ag, and La. The types of products are summarized in Scheme 226. The new compounds were found to have properties well-suited for use as precursors for atomic layer deposition (ALD) of thin films. 

Perspectives for fabrication of improved oxygen electrodes at a low cost have been offered by non-noble, transition metal catalysts, although their intrinsic catalytic activity and stability are lower in comparison with those of Pt and Pt-alloys. The vast majority of these materials comprise (1) macrocyclic metal transition complexes of the N4-type having Fe or Co as the central metal ion, i.e., porphyrins, phthalocyanines, and tetraazaannulenes [6-8] (2) transition metal carbides, nitrides, and oxides (e.g., FeCjc, TaOjcNy, MnOx) and (3) transition metal chalcogenide cluster compounds based on Chevrel phases, and Ru-based cluster/amorphous systems that contain chalcogen elements, mostly selenium. 

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