VALENCE PI-BONDING, DEWAR STRUCTURES AND FREE PI-RADICAL STRUCTURES OF METALLOFULLERENES

Theoretical considerations of the valence pi-bonding and free pi-radic als of fullerenes have been made. These will yield various possible sy mmetries and structures of the endohedral as well as exohedral single and multiple metallofullerenes. Aside from C-60(I-h), C-34(C-3 sigma) and C-28(T-d), we also consider C-33(C-3), C-56(T-d) and C-68(T-d) Suc h valence views will provide new aspects for the opposite views of mol ecular orbital calculations as well as for the arrangement of molecula r works.