title: Chalcogeno[bis(phosphaalkenyl)] germanium and tin compounds.
abstract: The first diphosphaalkenylstannylene stabilized through complexation with a carbene NHC-Sn[C(Cl)═PMes*](2)1 (Mes* = 2,4,6-tri-tert-butylphenyl; NHC = :C{N(iPr)C(Me)}(2)) was isolated and fully characterized including single crystal X-ray diffraction analysis. Its reaction with elemental sulfur rapidly gives the cyclic Sn(2)S(2) (dithiadistannetanne) derivative 3, presumably formed by dimerization of a stannathione intermediate. By contrast, its germanium analogue NHC-Ge[C(Cl)═PMes*](2)7 leads to the corresponding monomeric germathione 4 and germaselenone 5. The germaselenone was more stable than the germathione and could be structurally characterized. An unusual thermal cyclization reaction of the last one occurs with an excess of selenium to give the Ge(2)Se(3) (triselenadigermolane) ring derivative 6.
authors: Université de Toulouse, UPS, CNRS, LHFA, UMR 5069, 118 Route de Narbonne, F-31062 Toulouse cedex 09, France.
authors: Tibor-Gabor
authors: TG
authors: Kocsor
authors: Dimitri
authors: D
authors: Matioszek
authors: Gabriela
authors: G
authors: Nemeş
authors: Annie
authors: A
authors: Castel
authors: Jean
authors: J
authors: Escudié
authors: Petronela M
authors: PM
authors: Petrar
authors: Nathalie
authors: N
authors: Saffon
authors: Ionel
authors: I
authors: Haiduc