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

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.