Heteronuclear multiple bonding between heavier group 14 and 16 elements. A new class of germylated compounds, the germanethiocarbamyl and germaneselenocarbamyl chlorides L2(Cl)GeY (Y = S, Se)

I. Saur , G. Rima (1) , Heinz Gornitzka (1) , Karinne Miqueu (2) , J. Barrau

1 LHFA - Laboratoire Hétérochimie Fondamentale et Appliquée
2 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux

The first monomeric germanethiocarbamyl halides containing a chelating β-diiminate ligand, L2(Cl)Ge=Y (L2 = PhNC(Me)CHC(Me)NPh; Y = S (2), Y = Se (3)), have been prepared by the reaction of the corresponding heteroleptic halogermylene L2(Cl)Ge (1) with elemental sulfur or black selenium in refluxing toluene. Single-crystal X-ray structural analyses of 2 and 3 reveal that the germanium centers reside in highly distorted tetrahedral environments in these compounds; short Ge-Y distances (Ge-S = 2.07 Å (2); Ge-Se = 2.21 Å (3)) are indicative of an unsaturated character of these germanium-chalcogen bonds. Selective reactions between 2 or 3 and MeLi afforded the corresponding alkylated germanechalco-genones L2(Me)Ge=Y (Y = S (4), Se (5)).

Domaines: Catalyse; Chimie de coordination; Chimie organique; Polymères; Chimie théorique et/ou physique

I. Saur, G. Rima, Heinz Gornitzka, Karinne Miqueu, J. Barrau. Heteronuclear multiple bonding between heavier group 14 and 16 elements. A new class of germylated compounds, the germanethiocarbamyl and germaneselenocarbamyl chlorides L2(Cl)GeY (Y = S, Se). Organometallics, 2003, 22 (5), pp.1106-1109. ⟨10.1021/om0208974⟩. ⟨hal-01613266⟩