Formation and Structural Diversity of Organo-Functionalized Tin-Silver Selenide Clusters.
Formation and Structural Diversity of Organo-Functionalized Tin-Silver Selenide Clusters.
复制标题
有机功能化锡银团簇的形成和结构多样性
作者:
N. Rinn;L. Guggolz;K. Gries;K. Volz;J. Senker;S. Dehnen
When reacting the organic functionalized tin selenide clusters [(SnR1)3Se4Cl] (A, R1=CMe2CH2C(O)Me) or [(SnR1)4Se6] (B) with (SiMe3)2Se and [Ag(PPh3)3Cl] at −78 °C in CH2Cl2, a microcrystalline intermediate (compound1) precipitates, which was investigated by magic angle spinning (MAS) NMR spectroscopy, powder X‐ray diffraction (PXRD), energy dispersive X‐ray (EDX) spectroscopy, and quantum chemistry calculations, to derive information about its composition and structure. Compound1re‐dissolves under reorganization into the organo‐functionalized Ag/Sn/Se cluster compound [Ag6(μ6‐Se)(Ag8Se12){(R1Sn)2Se2}6] (2), or the mixed‐valence cluster [(AgPPh3)2(SnIICl)2Se2{(R1SnIV)2Se2}2] (3), depending on the presence or the exclusion of daylight, respectively. The addition of N2H4⋅H2O to a solution of1yields selectively [Ag7(μ7‐Se)(Ag7Se12){(R2Sn)2Se2}6] (4, R2=CMe2CH2C(N2H2)Me), the Ag/Sn/Se core of which is isomeric to that of2. 2–4were characterized by X‐ray diffraction. NMR spectroscopic studies on solutions of1indicate the co‐existence of different species.
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