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Redox properties of the carbyne, aminocarbyne and η2-vinyl complexes trans-[ReCl(LH)(dppe)2][BF4] (LH  CCH2But, CCH2Ph, CNH2 or η2-C(CH2Ph)CH2) and of their parent vinylidene, isocyanide and allene compounds

1988; Elsevier BV; Volume: 356; Issue: 3 Linguagem: Inglês

10.1016/0022-328x(88)83157-7

1872-8561

A. Amélia, N.D.A. Lemos, Armando J. L. Pombeiro,

Molecular Junctions and Nanostructures

The redox properties of the carbyne-, aminocarbyne- and η2-vinyl-(metallacyclopropene) complexes trans-[ReCl(LH)(dppe)2][BF4] (1; LH  CCH2R (R But or Ph), CNH2 and η2-C(CH2Ph)CH2; dppe  Ph2PCH2CH2PPh2), as well as of their parent vinylidene, isocyanide and allene complexes, trans-[ReClL(dppe)2] (2; L  CCHR, CNH or , have been studied by cyclic voltammetry and controlled potential electrolysis in aprotic media. The results are interpreted in terms of anodically- or cathodically-induced β-dehydrogenation processes of complexes (1), to give the corresponding compounds (2) (in the oxidized or the neutral form), as well as of a reversible dissociation of the former into the latter, in a basic solvent. The electrochemical PL ligand parameter has been estimated for all these ligands.