Two-Step Solvothermal Preparation of a Coordination Polymer Containing a Transition Metal Complex Fragment and a Thiostannate Anion: [{Mn(en)<sub>2</sub>}<sub>2</sub>(<i>μ</i>-en)(<i>μ</i>-Sn<sub>2</sub>S<sub>6</sub>)]<sub>∞</sub> (en, Ethylenediamine)
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A two-step solvothermal synthetic method was used for preparation of a one-dimensional compound, [{Mn(en)2}2(μ-en)(μ-Sn2S6)]∞ (1), in which the Mn(II) ions are bridged by thiostannate [Sn2S6]4- anions and linear coordinating ethylenediamine (en) molecules. At first, a clear yellow solution containing [Sn2S6]4- anions was previously obtained from a SnCl4/S/en mixture under solvothermal conditions. Then MnCl2·6H2O was added to the resulted solution, and the solvothermal reaction went on for additional days. Finally pale-yellow crystals of 1 were obtained. Using the same starting materials and in the same molar ratio, however, we obtained a colorless [Mn(en)3]2Sn2S6 (2) by the one-step, one-portion solvothermal reaction from a MnCl2/SnCl4/S/en mixture.
