Zucca, Antonio and Stoccoro, Sergio and Cinellu, Maria Agostina and Petretto, Giacomo Luigi and Minghetti, Giovanni (2007) Cyclometalated platinum(II) hydrides with nitrogen ligands. Organometallics, Vol. 26 (23), p. 5621-5626. eISSN 1520-6041. Article.
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Platinum(II) (N−N−C) cyclometalated hydrides, [Pt(N−N−C)H], (N−N−CH = 6-R-2,2‘-bipyridine, R = benzyl, phenyl, alkyl) have been obtained by reaction of the corresponding chlorides with NaBH4. Alternatively, some of them can also be synthesized from formato derivatives [Pt(N−N−C)(OC(O)H] by loss of CO2 or from cationic carbonyl species, [Pt(N−N−C)(CO)]+, by reaction with NaBH4. 1H NMR characterization reveals 1J(Pt−H) values among the largest ever reported, ca. 1600 Hz. Dinuclear derivatives with a bridging hydride, [(N−N−C)Pt(μ-H)Pt(N−N−C)]+, both symmetric and unsymmetric, can be built up through a classical approach, i.e., by reaction of a mononuclear terminal hydride and a solvento cationic complex [Pt(N−N−C)(S)]+.
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