Bis(perhalogenophenyl) derivatives of palladium(II) and platinum(II) containing S2CP(C6H11)3 as a mono- or bi-dentate ligand. Crystal structures of cis-[Pd(C6F5)2{S2CP(C6H11)3}] and cis-[Pt(C6F5)2{SC(S)P(C6H11)3}(CO)]

Abstract

Addition of S₂CP(C₆H₁₁)₃ to solutions of [M(C₆X₅)₂(OC₄H₈)₂](M = Pd or Pt; X = F or Cl) affords the derivatives [M(C₆X₅)₂{S₂CP(C₆H₁₁)₃}], which are the first containing S₂CP(C₆H₁₁)₃ chelate bonded to palladium or platinum. Reaction of the above complexes with 1 mol equivalent of a neutral monodentate ligand L leads to [M(C₆X₅)₂{SC(S)P(C₆H₁₁)₃}L](L = PPh₃, X = F, M = Pd or Pt; L = CO, X = F or CI, M = Pt; L = pyridine, X = F, M = Pt) where S₂CP(C₆H₁₁)₃ is monodentate. The structure of one example of each of these types has been determined by single-crystal X-ray crystallography: cis-[Pd(C₆F₅)₂{S₂CP(C₆H₁₁)₃}], space group C2/c, a= 26.654(8), b= 11.519(3), c= 24.223(7)Å, β= 116.93(3)°, Z= 8, and R= 0.045; cis-[Pt(C₆F₅)₂{SC(S)P(C₆H₁₁)₃}(CO)], space group P, a= 9.864(2), b= 14.202(3), c= 14.638(5)Å, α= 93.44(3), β= 103.11(2), γ= 105.45(2)°, Z= 2, and R= 0.042. The co-ordination at the metal atoms is planar. In the palladium derivative the chelating S₂CP group makes a dihedral angle of 12.3° to the ligand plane; in the platinum derivative the corresponding angle formed by the monodentate ligand is 55.3°.