Cobalt Group Metals

Peone and Vaska (58, 59) have reported the synthesis of a five-coordinate cobalt(I) complex, Co(CO)2(Ph3P)20C103, by treating the corresponding chloro complex with AgC104 in benzene. In a tetrahe- 

Perchlorate Frequencies of Cobalt Group Metal Complexes 

The diars complex has been isolated in two crystalline forms— monoclinic and orthorhombic. While the former has IR support for perchlorate coordination (65), the latter has X-ray crystal structure evidence (61) for very weak association of perchlorates with the metal ion in the axial positions. The PhNC complex exists in three isomeric forms, and the X-ray crystal structure of one of the forms (green), determined by Jurnak et al. (64), has indicated a perchlorate oxygen at the sixth coordination position around the metal ion with a Co—O distance of 2.594 A and a Co—O—Cl angle of 135.6°. The coordinated O—Cl bond (1.396 A) is longer than two of the uncoordinated ones (1.319, 1.327 A) but is, however, shorter than the third one (1.413 A). Karayannis and co-workers (33,34,39,40,52,53) have characterized a series of perchlorate coordinated cobalt(II) complexes containing the ligands adHNO, phzNO, quxNO, quxNC 2, and adH (Table IV). 

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Activation of Dioxygen by Cobalt Group Metal Complexes Claudio Bianchini and Robert W. Zoellner... 

Bianchini C, Zoellner RW. 1997. Activation of dioxygen by cobalt group metal complexes. Advinorg Chem 44 263. 

Heterotrimetallic sandwiches involving all three cobalt group metals 71-73 have been prepared and isolated 6 3 other tetradecker types synthesized recently include bent,76 arene-endcapped,74 and C2B3-endcapped7S sandwiches... 

Perchlorate ion complexes, 28 255-299 with cobalt group metals, 28 265-268 coordination types, 28 256-260 with copper group metals, 28 273-283 with early transition metals, 28 260-263 electronic spectra. 28 258-259 ESR spectra, 28 260 infrared and Raman spectra, 28 257-258 with iron group metals, 28 263-265 with lanthanides, 28 260-265, 287-288 magnetic susceptibility, 28 260 molar conductivities, 28 260 with nickel group metals. 28 268-273 X-ray crystal structure analysis, 28 256-257... 

ACTIVATION OF DIOXYGEN BY COBALT GROUP METAL COMPLEXES... 

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