The previously reported cationic cluster [Pt3(PPh3)4]+ has been shown to be [Pt3(PPh3)3(µ-PPh2)2(µ-H)]+ by X-ray structural analysis and 3lP n.m.r. studies. The presence of a bridging hydride ligand could not be detected in the X-ray structural determination nor by direct 1 H n.m.r. studies, but was unambiguously established by 31P and 31P-(1H) n.m.r. measurements at 145.8 MHz.
P. L. Bellon, A. Ceriotti, F. Demartin, G. Longoni and B. T. Heaton, J. Chem. Soc., Dalton Trans., 1982, 1671 DOI: 10.1039/DT9820001671
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