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The X-ray crystal structure analysis of the chloroform adduct of the bis(triphenylphosphine) platinum di-oxygen complex (PPh 3 ) 2 PtO 2• 2CHCl 3 is reported. The crystals belong to the monoclinic System a = 15.492(7), b = 13.520(5), c = 19.187(6) Å; β = 98.97(6)°. Space group C2/c. Z = 4 molecules per cell.A total of 2740 independent X-ray reflections were measured and refinement gave a final conventional R of 6.6%.The molecule has a two-fold axis of symmetry through the Pt atom with O—O normal to the axis. The O—O distance of 1.505(16) Å is in accord with that found with other transition elements when oxygen is taken up irreversibly to form di-oxygen complexes.
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Cheng et al. (1971) studied this question.
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