By Carl L. Rollinson, J. C. Bailar, H. J. Emeléus, Ronald Nyholm
The Chemistry of Chromium, Molybdenum and Tungsten offers with the chemistry of chromium, molybdenum, and tungsten. the invention and background, incidence and distribution, and creation of all 3 components are mentioned, besides their commercial makes use of, education, and allotropes; nuclear, actual, and chemical houses; organic actions; and analytical chemistry.
Organized into 3 sections, this quantity starts with an summary of the background, prevalence and distribution, and construction of chromium, molybdenum, and tungsten, in addition to their commercial makes use of, guidance, and allotropes; nuclear, actual, and chemical homes; organic actions; and analytical chemistry. The intermetallic stages in binary alloys of all 3 components also are thought of, besides their oxidation states and respective compounds together with compounds with non-metallic parts; compounds of ?-acceptor ligands; organometallic complexes; and peroxy compounds reminiscent of peroxychromates, tetraperoxy molybdates, and peroxy tungstates.
This publication could be of curiosity to inorganic chemists in addition to scholars and researchers within the box of inorganic chemistry.
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Extra info for The Chemistry of Chromium, Molybdenum and Tungsten
In the reduction of the chloroerythro ion, H I [(NH3)5Cr-0-Cr(NH3)4Cl]4+, by Cr(II), either chromium atom could accept an electron, but the attack might be expected on the chloride, which is known to be an effective bridging group in electron-transfer reactions. However, the OH group is also an electron mediator and it might therefore permit transfer of an electron, accepted by the chloride, through the tetrammine chromium to the pentammine chromium131. In the Cr(II)-catalyzed loss of NH 3 from the complex in aqueous acid solution, the ratedetermining step appears to be an electron-transfer reaction with the chloride acting as a bridging ligand as expected; this conclusion is suggested by the form of the rate law and the formation of [Cr(H20)sCl]2- in the reaction, which appears to be [(NH3)5CrOHCr(NH3)4Cl]4++5H30+ Cr2 + > [ C r ( N H 3 ) 5 H 2 0 ] 3 + + 4 N H 4 + + [Cr(H 2 0) 5 CI]2+.
Chadwick and A. G. Sharpe, "Transition Metal Cyanides and their Complexes", in Advances in Inorganic Chemistry and Radiochemistry, 8, Academic Press, N e w York (1965), p. 94. 8 9 F. A. Cotton and B. F. G . Johnson, Inorg. Chem. 3 (1964) 1609. 90 R. D . Feltham, W. Silverthorn and G. McPherson, Inorg. Chem. 8 (1969) 344. 91 S. F. Banks and J. Kleinberg, Inorg. Chem. 6 (1967) 1849. 92 F. Hein and S. Herzog, in Handbook of Preparative Inorganic Chemistry, 2, Academic Press, N e w York, 2 n d e d n .
Transition metal selenides and tellurides are isomorphous with the corresponding sulfides. Like the sulfides, they are berthollides. They have high melting points (> 2200°) and are relatively stable chemically. They are made by reaction of chromium with selenium or tellurium at high temperature. 3. CHROMIUM COMPOUNDS OF TT-ACCEPTOR LIGANDS™-" A remarkable property of the d-group transition elements is their capacity for forming complexes with many neutral compounds that stabilize low oxidation states of the metal, which may be zero or even negative.