ELECTROCHEMICAL-BEHAVIOR OF OLIGOMETALLIC SANDWICH COMPLEXES OF CYCLOSILOXANOLATE LIGANDS

The conductometric and voltammetric behaviour of 16 oligocyclosiloxano late transition metal complexes in DMF is reported and discussed. The results of the conductometric measurements indicate that in DMF most o f the compounds are electrolytes and the conductivity is due prevalent ly to the mobile (free) Na+ cation, the contribution of the large clus ter anion being negligible, The cyclic voltammetric curves show only o ne reversible peak couple with E-p values very close to each other. Th ese results suggest a high extent of electronic delocalisation in the cluster core of these sandwich type complexes and permit these compoun ds to be regarded as heteronuclear clusters of higher-valent transitio n metals.