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N,C “rollover” cyclometalated platinum(II) hydrides: mono- and polynuclear derivatives

Minghetti, Giovanni and Stoccoro, Sergio and Cinellu, Maria Agostina and Petretto, Giacomo Luigi and Zucca, Antonio (2008) N,C “rollover” cyclometalated platinum(II) hydrides: mono- and polynuclear derivatives. Organometallics, Vol. 27 (14), p. 3415-3421. eISSN 1520-6041. Article.

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DOI: 10.1021/om800027g


N,C cyclometalated platinum(II) hydrides were obtained by reaction of the “rollover” derivatives [Pt(N′−C(3))(Cl)(L)] (N−CH= 6- tert-butyl- and 6-phenyl-2,2′-bipyridine; L = DMSO, 3,5-Me 2-pyridine, PPh 3) with Na[BH 4]. Mono- or polynuclear hydrides, [Pt(N′−C(3))(H)(L)] or [Pt(N′−C(3))(μ-H)] n , are formed depending on the nature of the neutral ligand, L. The unsaturated 14-electron fragments [Pt(N′−C(3))(μ-H)] assemble to form oligomers with bridging hydrides. Spectroscopic characterization provides evidence for tetramers both in solution (1H NMR) and in vapor phase (ESI-MS). In the tetrameric systems the 2e−3c Pt−H−Pt bond is cleaved by π-acceptor ligands such as Ph 3P and CO to give stable mononuclear hydrides.

Item Type:Article
ID Code:4277
Uncontrolled Keywords:C-H bond, heteroaromatic-compounds, alkane dehydrogenation, palladium complexes, molecular-structure, crystal-structure, nitrogen ligands, n-h, activation, chemistry
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:American Chemical Society
Deposited On:26 Jul 2010 16:23

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