Cluster ligands, electrochemistry

Attaching a Ceo cluster to an [Ru(bpy)3] + core has been achieved by 1,3-dipolar cycloaddition of azomethine ylides to the fullerene. The electrochemistry of the complex is complicated a one-electron reversible oxidation of the Ru center, five one-electron reversible reductions associated with the Ceo cage, and five more reversible reductions centered on the bpy ligands. The photophysical properties of the complex have been discussed. ... 

Dinuclear clusters ferrous site distortion, 38 175 spin ladder, 38 182-183 Dinuclear cobalt complex, 45 291-293 Dinuclear complexes osmium, electrochemistry, 37 321-323 quadruply bridged, 40 187-235 axial ligand substitution properties, 40 232-234... 

The electrochemistry of the extracted FeMo cofactor has also been studied in depth [20]. Extracted At-methyl formamide (NMF) solutions of FeMo-co contain the intact cluster, probably with retention of the exogenous homocitrate ligand. Protein ligation are replaced with NMF ligands at... 

This section includes selected examples of electrochemistry of gold and silver complexes with other ligands and structural types that were not included in previous sections. We have also included a list of references divided into the following areas that can be consulted for additional information sulfur- and nitrogen-containing macrocycles , porphyrins " and clusters . 

Retaining the theme of metal carbonyl clusters, capping considerations in transition-metal clusters have been discussed with reference to [Sb2Co4(CX))] g( A-CX))], and [Bi2Co4(CO)jQ( i-CO)]" 28. An infrared spectroscopic study of the formation of carbonyl rhodium clusters on a rhodium electrode produced by oxidation reduction cycles in acidic solution 2 has also been published. Electrochemistry with ruthenium carbonyls >21 osmium carbonyls 2 jg also reported. Muon spin rotation in a metal-cluster carbonyl compound has been communicated and, lastly, a proton spin-lattice NMR relaxation study of hydride carbonyl clusters has been reported. This provides a method for determining distances involving hydrido ligands... 

Polyamidoamine (PAMAM) systems are perhaps the most studied in the area of electrochemistry in the presence of dendrimers. The uptake of by coordination to amine sites followed by reduction to Cu yielded clusters that have potential use for catalysis [38]. The stabiUty of the small clusters suggested that they reside in the cavities of these starburst molecules. Because PAMAM is a nonspecific ligand, the use of this method of preparing clusters is applicable to a wide range of metals. Moreover, the geometry of dendrimers and the variation of size that is available by controlling the generation number allow the prediction that they can be immobilized by a variety of methods at electrode surfaces. 

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