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Solvothermal Syntheses and Characterization of New Transition Metal Chalcogenidogermanates [{Co(tepa)} 2 (μ‐Ge 2 S 6 )] and [{M(tepa)} 2 (μ‐Ge 2 Se 6 )] (M = Mn, Fe) (tepa = Tetraethylenepentamine)
Author(s) -
Chen JiangFang,
Jin QinYan,
Pan YingLi,
Zhang Yong,
Jia DingXian
Publication year - 2010
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200900141
Subject(s) - isostructural , chalcogen , crystallography , transition metal , crystal structure , chemistry , octahedron , metal , solvothermal synthesis , inorganic chemistry , materials science , biochemistry , organic chemistry , catalysis
New transition metal chalcogenidogermanates [{Co(tepa)} 2 (μ‐Ge 2 S 6 )] ( 1 ) and [{M(tepa)} 2 (μ‐Ge 2 Se 6 )] (M = Mn ( 2 ), Fe ( 3 ); tepa = tetraethylenepentamine) were synthesized with GeO 2 , S(Se) and transition metal chloride as starting materials in tepa under solvothermal conditions. Complexes 1 – 3 crystallize in isostructural tetragonal space group I 4 1 / a . In 1 – 3 , the hexachalcogenidodigermanate anions are composed of two GeS 4 or GeSe 4 tetrahedra sharing a common edge, and act as bridging ligands by the trans terminal chalcogen atoms to link two [M(tepa)] 2+ cations, resulting in neutral complexes. All transition metal ions are in octahedral coordination environment involved in five nitrogen atoms and one chalcogen atom. Hydrogen bonds lead to three‐dimensional networks of [{Co(tepa)} 2 (μ‐Ge 2 S 6 )] and [{M(tepa)} 2 (μ‐Ge 2 Se 6 )] moieties in the crystal structures. TG‐DSC curves show that 1 – 3 get rid of tepa ligands in 180–400 °C temperature range when heated under nitrogen stream.