By D. L. Kepert, K. Vrieze
Compounds of the Transition components related to Metal-Metal Bonds offers with compounds of the transition components related to metal-metal bonds, with specific emphasis on metal-metal bonds in coordination compounds and organometallic complexes, halides, and oxides. elements that impression the formation, balance, and homes of such compounds, in addition to their software in a variety of fields of chemistry and physics, are mentioned.
This publication is split into 4 sections and starts with a category of metal-metal bonds and a few of the actual and chemical equipment used to check them, together with X-ray crystallography, magnetic susceptibility and electron spin resonance, nuclear spin resonance, Mössbauer measurements, infrared and Raman spectroscopy, seen and ultraviolet spectroscopy, mass spectrometry, electric conductivity, electrochemical equipment, and chemical reactivity. elements influencing the energy of metal-metal bonds in metals and compounds also are tested. the remainder sections care for metal-metal bonds in coordination compounds and organometallic complexes, halides, and oxides.
This monograph may be an invaluable source for inorganic chemists.
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Extra resources for Compounds of the Transition Elements Involving Metal-Metal Bonds: Pergamon Texts in Inorganic Chemistry, Volume 27
Chem. 3 (1964) 1123. 1 60 234 TRANSITION METAL-METAL BONDS: D . L. KEPERT AND K. VRIEZE M2(CO)io by various methods, which have been discussed in the Introduction. A thermo33 chemical value of 3 4 ± 13 kcal/mole was obtained for the p r o c e s s : Mn 2(CO)i 0 (g) -> 2-Mn(CO) 5 (g) Values obtained by mass spectrometry are 18·9± 1-4 so, 167 and 22 kcal/mole for 81 8 1 Mn2(CO)io and 51 kcal/mole for Re2(CO)io . The observed differences have been discussed before in terms of the different states in which the M n ( C O ) 5 radicals find themselves after formation by electron bombardment or by thermal dissociation.
88 (1966) 4847. J R. Mason and Α. I. M. Rae, / . Chem. Soc. (A) (1968) 778. " E. R. Corey and L. F. Dahl, Inorg. Chem. 1 (1962) 521. 1 G. Gardner-Summer, H. P. Klug and L. E. Alexander, Acta Cryst. 17 (1964) 732. m P. Corradini, / . Chem. Phys. 31 (1959) 1676, n C. H. Wei and L. F. Dahl, / . Am. Chem. Soc. 88 (1966) 1821. °p C. H. Wei, G. R. Wilkes and L. F. Dahl, / . Am. Chem. Soc. 89 (1967) 4792. E. R. Corey, L. F. Dahl and W. Beck, / . Am. Chem. Soc. 85 (1963) 1202. r A. F. , Clarendon Press, Oxford (1962).
VRIEZE 79 Mass spectrometry gave a C o - C o bond dissociation energy of about 12 kcal/mole . Very little is known about Rh2(CO)g and Ir2(CO)$. N o X-ray or infrared measurements have been published for Rh 2 (CO)s. For Ir 2(CO)s a structure without bridging carbonyl 149 groups was suggested . The structures of the dodecacarbonyls M 4 (CO)i2 (Co, Rh, Ir) are all known. In Co4(CO)i2 the cobalt atoms are situated on the corners of a regular tetrahedron 5 0 with C o - C o bonds of 2-50 Â . N o significant changes in the metal-metal bond length were observed for the six metal-metal distances (Fig.