Of coordination compounds

Other Inorganics. Inorganic species in solution have been studied very effectively by Raman spectroscopy. Work in this area includes the investigation of coordination compounds (qv) of fluorine (qv) (40), the characterization of low dimensional materials (41) and coordinated ligands (42), and single-crystal studies (43). Several compilations of characteristic vibrational frequencies of main-group elements have been pubflshed to aid in the identification of these species (44,45). 

Ternary compounds are also named by citing the more electropositive constituent first. The various oxidation states of the more electropositive element are designated by a system of prefixes and terminations added to a stem characteristic of the element, except in the case of coordination compounds (qv). Examples are as follows (see Chlorine oxygen acids and salts) ... 

Trialkyl- and triarylarsine sulfides have been prepared by several different methods. The reaction of sulfur with a tertiary arsine, with or without a solvent, gives the sulfides in almost quantitative yields. Another method involves the reaction of hydrogen sulfide with a tertiary arsine oxide, hydroxyhahde, or dihaloarsorane. X-ray diffraction studies of triphenylarsine sulfide [3937-40-4], C gH AsS, show the arsenic to be tetrahedral the arsenic—sulfur bond is a tme double bond (137). Triphenylarsine sulfide and trimethylarsine sulfide [38859-90-4], C H AsS, form a number of coordination compounds with salts of transition elements (138,139). Both trialkyl- and triarylarsine selenides have been reported. The trialkyl compounds have been prepared by refluxing trialkylarsines with selenium powder (140). The preparation of triphenylarsine selenide [65374-39-2], C gH AsSe, from dichlorotriphenylarsorane and hydrogen selenide has been reported (141), but other workers could not dupHcate this work (140). 

G. Wilkinson, R. D. GUlard, and J. A. McCleverty, Comprehensive Coordination Chemistry, The Synthesis, Reactions, Properties od dpplications of Coordination Compounds, Vols. 1—7, Pergamon Press, Oxford, New York, Beijing, Frankfurt, Sro Paulo, Sydney, Tokyo, Toronto, 1987. 

Stability. The thermodynamic stabiUty of coordination compounds in solution has been extensively studied (12). The equiUbrium constants may be reported as stabiUty or formation constants. 

Irradiation of coordination compounds in the charge-transfer spectral region can often enhance redox reactions. The quantum yields are variable. 

J. C. Bailar, Jr., ed.. Chemistry of Coordination Compounds, JiCS Monograph /i/. Reinhold Pubhshiag Corp., New York, 1956. Dated but very good on the historical and classical aspects of coordination chemistry. 

G. B. Kauffman, Inorganic Coordination Compounds, Heyden, London, 1981. An excellent volume on the history of coordination compounds prior to 1935. 

Solvates are perhaps less prevalent in compounds prepared from liquid ammonia solutions than are hydrates precipitated from aqueous systems, but large numbers of ammines are known, and their study formed the basis of Werner s theory of coordination compounds (1891-5). Frequently, however, solvolysis (ammonolysis) occurs (cf. hydrolysis). Examples are ... 

Synthesis of coordination compounds and catalysis with participation of fluoro derivatives of alkaloids 98KK3. 

Chiral cyclic esters of phosphonic acid in the synthesis of coordination compounds and homogeneous asymmetric catalysis 99KK83. 

A. von Zelewsky, Stereoehemistry of Coordination Compounds (Inorganie Chemistry), Wiley, Chiehester, 1995. 

V. Balzani, and V. Carassiti, Photo Chemistry of Coordination Compounds, Academic Press, London Chapter 5 (1970). 

Werner spent the next 20 years obtaining experimental evidence to prove his theory. (At the University of Zurich, there remain several thousand samples of coordination compounds prepared by Werner and his students.) He was able to show, for... 

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