Some studies in inorganic complexes. III. Antimony(III), Arsenic(III), and Phosphorus (III)

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Abstract
A study has been made of complexes of the halides of antimony, arsenic, and phosphorus with the chelating ligand o-phenylenebisdimethylarsine. Conductivity and molecular weight determinations in nitrobenzene show that these are &covalent monomers of the type SbX3.D, AsX3D, and PX3.D, in which X is halogen and D is diarsine. However, in this solvent there is a progressive tendency towards ionization from Sb to P and from Cl to I, so that the iodo complexes of arsenic and phosphorus are partly ionized as [AsI2D]+I- and [PI2D]+I- respectively. This is also in accordance with the preparation of the perchlorate [AsI2D]+[ClO4]-.H2O from the complex [AsI2D]+I-. A study was also made of the phenanthrolinium salts [phenanH.H2O]+[SbX4]-, although no compounds were obtained in which the base is coordinated to the metal.

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