Abstract
IN recent years, a number of tertiary arsine oxide1 and tertiary phosphine oxide2 complexes of metal salts have been prepared. The metal atom, in all cases, has been shown, using magnetic and spectral data, to display the usual tetrahedral or octahedral stereochemistry. We report here a new class of compound, using diphenylmethylarsine oxide as ligand, in which the metal atom is five co-ordinate with a tetragonal pyramid structure, the fifth position being occupied by a perchlorate group*. Complexes of the composition M(II)(Ph2MeAsO)4(ClO4)2, M = Mn,Fe,Co,Ni,Cu,Zn, are obtained from alcoholic solutions of the arsine oxide and the corresponding perchlorate. X-ray powder photographs indicate that these substances are isostructural. The infra-red spectra of the manganese, cobalt, nickel and zinc complexes in the 1,100 cm−1 region indicate the presence of both coordinated and uncoordinated perchlorate groups, while the spectra of the corresponding iron and copper salts indicate the presence of ionic perchlorate only3.
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LEWIS, J., NYHOLM, R. & RODLEY, G. Metal Complexes of Diphenylmethylarsine Oxide Involving Co-ordinated Perchlorate Ions. Nature 207, 72–73 (1965). https://doi.org/10.1038/207072b0
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DOI: https://doi.org/10.1038/207072b0
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