We would like to acknowledge the close interaction with A. Eberhardt;
L.B;
Zhou;
J;
Li;
N. Camillone III;
G.-Y;
Liu;
T.A. Ramanarayanan and G. Scoles throughout these studies. In addition;
we are very grateful to C.E.D. Chidsey and T. Putvinskii for graciously supplying us with the C2~ and C3o compounds. This work was supported by NSF award number DMR-93-11871;
MRSEC award number DMR-94-00362;
DOE award number DE-FG02-93ER45503;
and was performed at the NSLS which is supported by DOE Contract No. DE-AC0276CH-00016;