Bimetallic systems. Part 10. Synthesis of complexes of type [(RCC)Pt(µ-dppm)2Pt(CCR)](dppm = Ph2PCH2PPh2, R = Ph or p-tolyl) and their corresponding ‘A frames’[(RCC)Pt(µ-dppm)2(µ-H)Pt(CCR)]Cl or [(RCC)Pt(µ-dppm)2(µ-X)Pt(CCR)] with X = CS2or MeOOCCCCOOMe
- 1 January 1985
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 5,p. 1015-1017
- https://doi.org/10.1039/dt9850001015
Abstract
Treatment of trans-[Pt(CCR)2(dppm-P)2](dppm = Ph2PCH2PPh2, R = Ph or p-tolyl) with trans-[PtH (Cl)(PPh3)2] gives hydride-bridged binuclear salts of type [(RCC)Pt(µ-dppm)2(µ-H)Pt-(CCR)]Cl in good (86–97%) yield. These complexes are fluxional at +21 °C but when cooled to –56 °C the 1H n.m.r. spectrum corresponds to a static structure with pseudo-axial and pseudo-equatorial methylene hydrogen resonances. Deprotonation of these salts with sodium isopropoxide gives the binuclear complexes, [(RCC) Pt(µ-dppm)2Pt(CCR)], with platinum–platinum bonds. These react with CS2 or with MeOOCCCCOOMe, ‘X’, to give ‘A frames,’[(RCC) Pt(µ-dppm)2-(µ-X)Pt(CCR)], which were fully characterized. Treatment of [(PhCC)Pt(µ-dppm)2Pt(CCPh)] with SO2 probably gave the ‘A frame’[(PhCC)Pt(µ-dppm)2(µ-SO2)Pt(CCPh)] which was not isolated but was characterized in solution by 31P-{1H}n.m.r. spectroscopy. N.m.r. and i.r. data are given.Keywords
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