154425-85-1Relevant articles and documents
Crystal and molecular structure of bis(diphenyldithiophosphinato)lead(II), ∞1[Pb(S2PPh2)2], a new type of polymer associated through Pb?S secondary interactions
Ebert, Klaus H.,Breunig, Hans J.,Silvestru, Cristian,Stefan, Ionel,Haiduc, Ionel
, p. 1695 - 1699 (2008/10/08)
Bis(diphenyldithiophosphinato)lead(II), Pb(S2PPh2)2, was obtained either as a redistribution/decomposition product of Ph2Pb(S2PPh2)2 or directly as a reaction product of Pb(OCOCH3)2·3H2O and NH4S2PPh2. Its crystal and molecular structure was determined by X-ray diffraction. The compound crystallizes in the triclinic space group P1, with cell parameters a = 9.017(2) A?, b = 10.839(2) A?, c = 12.808(2) A?, α = 99.48(2)°, β = 90.13(2)°, γ = 97.91(2)°, and Z = 2. The monomeric unit contains distorted square-pyramidal PbS4 units. Additionally, each lead atom has two weak lead-sulfur contacts of 327.0 and 344.8 pm with neighboring molecules, lying on the free side of the PbS4 fragment. This leads to molecule pair units which are repeated in a chain polymeric structure. The coordination polyhedron around lead in the polymeric chain can be described as strongly distorted octahedron, with axial positions occupied by a sulfur atom of a neighboring molecule and a sulfur atom of the proper monomeric unit (S?Pb-S 178.0°), or, alternatively, as a ψ-caped octahedron, with the stereochemically active electron pair of lead in the capped position.
