Cyano binuclear

Table 4 Some cyano-bridged binuclear complexes of established structure.

Table 45 Preparation and Spectroscopic Properties of Binuclear Cyano-bddged Complexes11... 

The possibility of using surface modification of cheap metals to make them effective electrode materials has been mentioned (Section 57.3.2.3(1)). A further example employs cyanoferrates and cyanoruthenates as the redox centres.76 Complexes such as [M(CN)5L]" (M = Fe, Ru L = CN, H20, NO, L-histidine) may be immobilized on a partially corroded nickel surface. The surfaces have good stability and diffuse reflectance IR spectroscopy shows the presence of bridging cyano groups, implying the presence of a binuclear (Ni, M) species in the surface. A general equation for the redox reaction is ... 

Haim, A. and W. K. Wilmarth Binuclear Complex Ions III. Formation of Peroxo and Cyano Bridged Complexes by Oxidation of the Pentacyano Complexes of Cobalt (II). J. Am. Chem. Soc. 83, 509 (1961). 

Three further papers have appeared on the reaction of polyaminocarboxyl-ato-iron(III) complexes with cyanide. In all cases the reaction sequence involves a final redox step, in which liberated ligand reduces intermediate cyano-iron(III) species to hexacyanoferrate(II). The ligands involved are N-(2-hydroxyethyl)iminodiacetate, triethylenetetraminehexaacetate, and 2-hydroxytrimethylenediaminetetraacetate both in mononuclear and in binuclear complexes. 

The second example to be discussed here belongs to a series of polychromophoric complexes synthesized in the context of some intercomponent energy transfer studies (see Section 5) [70]. These are cyano-bridged binuclear and trinuclear complexes of formula... 

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