HTMCC displaying electron-sponge features

for example, still possible that an ad hoc situation eould be responsible for the redox behavior of [CogC(CO)i8] and [Coi3C2(CO)24] n = 3,4). The metal framework of the former ean be loosely deseribed as a bi-capped trigonal prism eentered by the unique carbide atom. The structure of the [Coi3C2(CO)24] anions is shown in Fig. 8, ° and is formally derived from the fusion of two 

This experimental conclusion is in good agreement with previous theoretical results obtained by LCGTO-LDF calculations on [Ni32C6(CO)36] and 

The comparative analysis performed in the previous sections draws attention to a set of factors which can serve as guidelines for the identification and synthesis of new HTMCC which could have redox activity and, eventually, lead to electron- 

In conclusion, it should be noted that the recently reported [Pd33Ni9(CO)4i-(PPh3)6] and Hi2Pd2gPti3(CO)27(PMe3)(PPh3)i2 carbonyl-substituted bimetallic clusters contain bulk metal atoms (one and four, respectively) but do not have reversible redox behavior. 

We thank the University of Bologna and the HCM program of the EU for a grant. Drawings of the structures and molecular orbitals of HTMCC were produced with SCHAKAL88 ° and CACAO, respectively. 

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