Über Verbindungen subvalenter Hauptgruppenmetallkationen mit Dithiolaten, 4. Mitteilung [1] Die Kristallstrukturen der Verbindungen Pb[S(CN)C=C(CN)S] und (AsPh4)2{Pb[S(CN)C=C(CN)S]2} / Compounds of Subvalent Main Group Metal Cations with Dithiolates, Part

The crystal structures of Pb[S(CN)C=C(CN)S] and (AsPh4)2{Pb[S(CN)C=C(CN)S]2} have been determined by X-ray diffraction. PbS2C4N2, crystallizes in the non-centrosymmetric space group P21 with a = 7.292(3), b = 7.420(3), c = 5.789(2) Å, β = 95.47(5)° and Ζ = 2. The lead atom is coordinated by three S atoms of dithioligands. The coordination sphere around Pb includes a stereochemically active lone-pair and is described as a distorted tetrahedron. (AsPh4)2[Pb(S2C4N2)2] crystallizes in the triclinic space group P1 with a = 17.205(3), b = 13.342(3), c = 12.059(2) Å, α = 106.15(7), β = 102.92(6), γ = 79.50(3)° and Z = 2. In the complex anion {Pb[S(CN)C=C(CN)S]2}2- the Pb-atom is located at a centre of a distorted trigonal bipyramid with a stereochemically active lone-pair in an equatorial position.