2-thioanisyldichlorophosphine, new starting material for the preparation of multidentate phosphine ligands: syntheses and characterization of derivatives of 2-anisyl- and 2-thioanisyldichlorophosphines

A new aryldichlorophosphine, 2-thioanisyldichlorophosphine, and its anisyl analogue, 2-anisyldichlorophosphine, were prepared by using an organozinc h alide reagent of 2-thioanisole or 2-anisole with ethereal solution of PCl3 in refluxing conditions. From these aryldichlorophosphines, eight new multi dentate phosphine ligands containing 2-thioanisyl, 4-thioanisyl, 2-anisyl, 1-naphthyl and 9-anthracenyl groups were synthesized and characterized. Cha racterization was based mainly on NMR spectroscopy and X-ray crystallograph y. The crystal structures of six ligands are reported. The electronic effec ts on basicity of ligands are discussed. (C) 2000 Elsevier Science S.A. All rights reserved.