A new procedure was developed for the: synthesis of (eta(3)-C8H13)Rh(eta-7,
8-Me-2-7,8-C2B9H9) (1). This method involves the interaction of [codRhCl](2
) with Cs[7,8-Me-2-7,8-C2B9H10] in CH2Cl2. The reactions of compound 1 with
arenes in trifluoroacetic acid afforded the previously unknown cationic ar
enerhodacarboranes [(eta-arene)Rh(eta-7,8-Me-2-7,8-C2B9H9)]BF4 in high yiel
ds.