Three Pt-Ii Catecholate and 1,2-Dithiocatecholate Complexes

In the crystal structures of the three title complexes, (benzene-1,2-diolato-O,O')bis(triphenylphosphine)platinum(II), [Pt(C 6 H 4 O 2 )(C 18 H 15 P) 2 ], (1), (benzene-1,2-dithiolato-S,S') bis (triphenylphosphine)platinum(II), [Pt(C 6 H 4 S 2 )(C 18 H 15 P) 2 ] (2), and the n-hexane hemisolvate of (benzene-1,2-diolato-O,O')-bis(tricyclohexylphosphine)platinum(II), [Pt(C 6 H 4 O 2 )(C 18 H 33 P) 2 ].0.5C 6 H 14 , (3), the Pt atoms are tetracoordinate with distorted square-planar geometry. Compounds (1) and (2) are isostructural.