Hexacyanometalate anions

Hexacyano-dinickelate (1) ion, 4 141 Hexacyanofeirate ion, 3 24-25 Hexacyanometalate anions, 43 244—245 Hexadecacarbonylhexairidium, reaction with soft nucleophiles, 30 193 Hexadecacarbonylhexarhodium reactions of reduction, 30 176 with soft nucleophiles, 30 193... 

Hexacyanometalate anions containing cobalt (III) and a combination of iron (II) and iron (III) gave the most active catalysts. The particular hexacyanometalate compound used as a precipitant often had an effect on the catalyst preparation. Potassium coprecipitated, with the zinc salts and use of potassium hexacyanometalate resulted in less-... 

The porous character of the cyanometallates structure is linked to the coordination taken up by the metal (M) in the hexacyanometallate anion, M(CN)f, ", that shapes the salt of the cyanomet-allate anion [238], For example, hexacyanometallates can be considered as a three-dimensional framework of a molecular block, the hexacyanometallate anion, [M(CN)6]", through a transition metal cation Tm+, which connects the N ends of the adjacent blocks [239],... 

In most of these structures, hexacyanometalate anions serve as the central units, although two structures with octacy anomolybdate also were reported (158,204). In the latter cases, two CN ligands on the central metal ionremain terminal [Fig.45(Zi)]. 

The hexacyanometalate anions [BCCNlg]" have long been known to be flexible building blocks for obtaining polymetallic compounds. These... 

Three types of pentanuclear cyanide-bridged complexes were described, namely, TBPs, cross-shaped clusters, and open chains. As shown by the Dunbar group (173-177), the TBP architecture is amenable to a wide variety of transition metal ions. In fact, neutral complexes of the general formula [M tmphen)2]3[M CN)6]2 were prepared with 22 different combinations of metal ions (Table V). In these structures (Fig. 34), two [M (CN)6] anions occupy the axial positions of the TBP core. Three cyanide ligands of each hexacyanometalate unit act as bridges, whereas... 

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