“…The recent discovery and isolation of metal-encapsulated fullerenes (A m @C 2 n , m = 1−3, n = 30−70) represents a unique class of new compounds. These endohedral metallofullerenes − are of special interest because of their unique structural arrangement and potential applications. ,, For example, predicted applications already include possible uses as nonlinear optical devices, catalysts, superconductors, , lasers, and ferroelectric materials. , Although most endohedral metallofullerenes isolated to date have cages of 80 carbons or greater (Sc 2 @C 74 , , Sc 2 @C 84 , ,,,, Sc 3 @C 82 , ,,− Y@C 82 , ,, Y 2 @C 90 , La@C 82 , − ,− La 2 @C 80 , , Gd@C 82 , ,, Gd 2 @C 90 , Er 2 @C 82 , and Pr@C 82 26 ), a notable exception i...…”