12. "Synthesis and Structure of a Cationic Diplatinum µ-Alkylidene µ-Hydride Complex," Michael A. Zhuravel, David S. Glueck, Louise M. Liable-Sands, and Arnold L. Rheingold, Organometallics 1998, 17, 574-578.

The dinuclear µ-alkylidene µ-hydride cation [Pt₂(dppf)₂(µ-CHCH₂Ar)(µ-H)][Br] (2, dppf = Ph₂PC₅H₄FeC₅H₄PPh₂, Ar = p-MeOC₆H₄), obtained unexpectedly from reaction of p-methoxybromostyrene (3) with Pt(dppf)Cl₂/NaBH₄/norbornene, was characterized crystallographically. Deprotonation of the known cation [Pt₂(dppf)₂H₃]+ (6) or treatment of Pt(dppf)Cl₂ with two equiv of LiBEt₃H gives solutions of [Pt(dppf)H]₂ (7), which deposit a precipitate of insoluble [Pt(dppf)H]_n (11). Reaction of 11 with 3 also gives cation 2, but the mechanism of this transformation remains unclear.