Ov. Gusev et al., BIS(ETA(5)-PENTAMETHYLCYCLOPENTADIENYL)-PLATINUM AND (ETA(5)-CYCLOPENTADIENYL) (ETA(5)-PENTAMETHYLCYCLOPENTADIENYL)-PLATINIUM DICATIONS .4.METALLOCENES, Journal of organometallic chemistry, 480(1-2), 1994, pp. 30000016-30000017
Reaction of [Pt2(eta5-C5Me5)2(mu-Br)3]3+ (Br-)3 with C5R5H (R = H, Me)
in the presence of AgBF4 gives the first platinocenium dications, [Pt
(eta5-C5Me5)(eta5-C5R5)]2+ (BF4-)2. On electrochemical reduction, [Pt(
eta5-C5Me5)2]2+ yields [Pt(eta4-C5Me5H)(eta2-C5Me5)]+ BF4-.