Organostibines as ligands. Synthesis of dimethyl(α-picolyl)stibine, dimethyl(8-quinolyl)stibine, and ( R; S)-methylphenyl(8-quinolyl)stibine and some transition metal derivatives

Abstract

The unsymmetrical mono-tertiary stibines dimethyl(α-picolyl)stibine (picstib), dimethyl(8-quinolyl)stibine (quinstib), and ( R; S)-methylphenyl(8-quinolyl)stibine ( R; S-quinstib) have been synthesised and the square-planar complexes [MX 2(picstib)], [MX 2(quinstib)] (where M = Pd or Pt and X = Cl, Br, I or SCN) and [MCl 2( R; S-quinstib)] (where M = Pd or Pt) isolated. The thiocyanato derivatives display linkage isomerism. The octahedral complexes [M(CO) 4-(picstib)] and [M(CO) 4(quinstib)] have also been prepared from the metal hexacarbonyls and the appropriate ligands by UV irradiation in tetrahydrofuran.