Superoxo, chromium complex

Figure 14.17 Structures of (a) the tetraperoxochromate(V) ion [Cr (02)4] , (b) the pyridine oxodiperoxo-chromium(VI) complex [Cr 0(02)2py], and (c) the triamminodiperoxochromium(IV) complex [Cr" (NH3)3(02)2] showing important interatomic distances and angles. (This last compound was originally described as a chromium(II) superoxo complex [Ci (NH3)3(02)2] on the basis of an apparent 0-0 distance of 131 pm/ and is a salutary example of the factual and interpretative errors that can arise even in X-ray diffraction studies. " ...

The complexes of other metals (chromium, manganese, nickel, etc.) can also form end-on superoxo adducts with dioxygen examples of this chemistry have been reviewed elsewhere.10,14... 

III.B.2), complexes with manganese, chromium, as well as second- and third-row transition metal ions (e.g., ruthenium) oxidation reactions with dioxygen alone or with other peroxides (e.g., ferf-butyl-peroxide) the stabilization and spectroscopic characterization of mononuclear superoxo, peroxo, and oxo complexes other catalytic processes (e.g., the iron-catalyzed aziridination), enantioselective reactions with chiral bispidine ligands and the iron oxidation chemistry continues to produce novel and exciting results. 

Complexes of chromium(n) and cobalt(II) react rapidly with dioxygen to yield metal superoxo ions as initieil products. 

The coordination chemistry of molybdenum reported during 1991 is reviewed, 20 as is the organometallic literature of the chromium triad reported during 1992.321 There is much material of interest in a review of chromium (II) based methods for C-C bond formation322 and a short review of recent developments in the use of chromium carbene complexes in organic synthesis.323 There is some material of interest in a review of peroxo and superoxo complexes of Cr, Mo and W324 and a review of chromium (III) cyano-am(m)ine complexes.325... 

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