Synthesis and crystal structure of chalcogenide cluster compound

Journal of the Brazilian Chemical Society

Bárbara Tirloni²  Davi F. Back²  Robert A. Burrow²  Gelson N. M. De Oliveira²  Marcos A. Villetti¹  Ernesto S. Lang² 

[1] ,Universidade Federal de Santa Maria Departamento de Química Santa Maria RS ,Brazil

关键词: mercury(II) complexes;    selenium;    tellurium;    clusters;   

DOI  :  10.1590/S0103-50532010000700010

来源: SciELO

【 摘 要 】

Three new cluster compounds were synthesized from Hg(EPh)2 (E = Se, Te; Ph = phenyl) in organic solvents. Two of these compounds, [Hg2Cl2(SePh)2(PCy3)2], (1), and [Hg2Br2(SePh)2(PCy3)2], (2), were prepared by reaction of Hg(SePh)2, HgX2 (X = Cl, Br) and tricyclohexylphosphine, PCy3, in dimethylformamide. The reaction of Hg(TePh)2 with HgBr2 in tetrahydrofuran using triphenylphosphine or 2,2’-bipyridine as co-ligands gave the polymeric cluster [{Hg5Br3(TePh)7}n] (3), whose dissolution in dimethylsulfoxide yielded the cluster [Hg3Br3(TePh)3]·2dmso. The influence of different ligands, coordinating solvents and reaction stoichiometries on the formation of the title compounds is also discussed. All complexes were characterized by elemental analysis, thermogravimetric analysis and single crystal X-ray diffractometry.

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