Abstract

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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