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The Oxidation reaction in X-irradiated bis(ethylenediamine)platinum(II) bis(hydrogen squarate) : a single crystal EPR study of a platinum(III) complex

Published inInorganic chemistry, vol. 31, no. 24, p. 5056-5060
Publication date1992
Abstract

A large single crystal of bis(ethy1enediamine)platinum bis(hydrogen squarate) ( [Pt(en)z](HSq)2), has been X-irradiated at 77 K and studied by EPR. The g and I 9 5 P t hyperfine tensors obtained from the angular dependence of the spectrum are consistent with the trapping of a Pt(II1) complex containing the unpaired electron in a dz2 orbital. Comparison of the orientations of the eigenvectors with those of the crystallographic interatomic vectors together with the predictions of Xa calculations on the model complex [Pt(NH3)4(0H)2]+ leads to a mechanism whereby a radiogenic radical, formed by homolytic scission of the hydrogen squarate hydroxyl, oxidizes the Pt(en)2 dication and yields [Pt(en)l(Sq)] (HSq).

Citation (ISO format)
GEOFFROY, Michel et al. The Oxidation reaction in X-irradiated bis(ethylenediamine)platinum(II) bis(hydrogen squarate) : a single crystal EPR study of a platinum(III) complex. In: Inorganic chemistry, 1992, vol. 31, n° 24, p. 5056–5060. doi: 10.1021/ic00050a025
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ISSN of the journal1939-5175
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