Chemistry chromium

Recent Developments in Chromium Chemistry Donald A. House... 

Chromium chemistry is imperfectly understood, and existing analytical methodologies are inadequate for quantification of chromium species and ionic states... 

A review of recent advances in chromium chemistry (82) supplements earlier comprehensive reviews of kinetics and mechanisms of substitution in chromium(III) complexes (83). This recent review tabulates kinetic parameters for base hydrolysis of some Cr(III) complexes, mentions mechanisms of formation of polynuclear Cr(III) species, and discusses current views on the question of the mechanism(s) of such reactions. It seems that both CB (conjugate base) and SVj2 mechanisms operate, depending on the situation. The important role played by ionpairing in base hydrolysis of macrocyclic complexes of chromium(III) has been stressed. This is evidenced by the observed order, greater... 

Interesting new developments in chromium chemistry which have been reported this year include the preparation of butadienetetracarbonylchromiurn by treating chromium atoms with butadiene, followed by subsequent treatment with The first ring-exchange reactions involving metallocenes have... 

This article summarizes areas of chromium chemistry that are often neglected in modern textbooks of inorganic chemistry, and yet are topics of considerable research importance. 

Reviews and texts including substantial coverage of chromium chemistry (2, 3) and mechanistic studies (4, 5) have appeared. In what follows, reference is made to the developing chemistry of the Cr(IV)... 

Earlier work on the coordination and general chemistry of chromium is described in several treatises 2-4 there are reviews for the years 1979-1983,, 6 and a list of crystal structures to mid-1976 is available.7 Summaries of chromium chemistry have been provided in two recent textbooks.8,9... 

Barnhart J. 1997. Chromium chemistry and implications for environmental fate and toxicity. Journal of Soil Contamination 6(6) 561-568. 

Until recently, polynuclear chromium chemistry was largely restricted to the oxo-centered metal triangles that have been studied for a number of years. Cannon and White reviewed this chemistry in 1988 58). The lack of larger clusters appeared to be due to the stability of the oxo-centered triangles and to the unreactive nature of the Cr(III) ion ... 

The remarkable chemical and coirfigurational stability of octahedral Cr complexes see Octahedral) was responsible for their role in the groundbreaking work of Alfred Werner, the father of modem coordination chemistry see Coordination Chemistry History). In the twentieth century, the same properties led to their use in studies of the reaction mechanisms of metal complexes. In recent years, the chemistry of the chromium carbon bond has been the most active area of research in chromium chemistry see Chromium Organometallic Chemistry), motivated in part... 

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