Osmium-(V), -(IV) and -(III) Complexes with Tetradentate Dianioic Chelating Ligands

DOI: 10.1039/DT9920000091

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 91 - 96 (1992)

Update date:2022-09-26

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Authors:

Cheng, Wing-Kin

Wong, Kwok-Yin

Tong, Wai-Fong

Lai, Ting-Fong

Che, Chi-Ming

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Article abstract of DOI:10.1039/DT9920000091

Osmium-(III) and -(IV) complexes of the ligands salen , bpb and bpc were synthesised by reducing the corresponding trans-dioxoosmium(VI) complexes with PPh3.The structure of IV(salen)(OPrⁱ)2> has been detremined by X-ray crystallography: monoclinic, space group C2/c (no. 15), a = 15.367(2), b = 7.847(1), c = 17.999(2) Angstroem, β = 95.36(1) deg and Z = 4.Electrochemical studies of trans-dialkoxyoosmium(IV) complexes in acetonitrile showed a reversible oxidation wave assignable to the oxidation of Os^IV to Os^V.Some trans-dialkoxyoosmium(V) complexes were characterised by UV/VIS spectroscopy.The osmium(III) complexes of salen, bpb and bpc were found to catalyse the oxidation of alkenes by iodosylbenzene.

Full text of DOI:10.1039/DT9920000091

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