Transition metal clusters electrochemistry

The electrochemistry of HNCC is a new and rapidly expanding field which has not been covered in previous reviews of electrochemical studies of transition metal clusters 420). In a similar way to smaller clusters, HNCC have been found to exhibit both reversible and irreversible redox behavior. These processes will be discussed separately in the following sections. 

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... 

Polyoxometalates (POMs) are early transition metal (V, Nb, Ta, W, Mo, etc.) oxygen anion clusters that have been applied in various fields, such as structural chemistry, analytical chemistry, surface science, medicine, electrochemistry, photochemistry, and catalysis. POMs have the following advantages as oxidation... 

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