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Solvothermal Reactions between Barium, Manganese, and Tellurium in Methylamine – the Formation of Polytellurides and Unexpected Cyanido Complexes
Author(s) -
Kysliak Oleksandr,
Beck Johannes
Publication year - 2014
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.201300514
Subject(s) - manganese , barium , methylamine , chemistry , tellurium , octahedron , inorganic chemistry , cyanide , cationic polymerization , crystallography , crystal structure , polymer chemistry , organic chemistry
The reactions between elemental barium or manganese and tellurium in methylamine under solvothermal conditions at temperatures between 50 and 100 °C yield the tri‐ and ditellurides [Ba(MeNH 2 ) 3 ]Te 3 ( 1 ) and [Mn(MeNH 2 ) 4 Te 2 ] n ( 2 ). The analogous reactions with mixtures of both metals barium and manganese lead additionally to cyanide‐containing species [Mn 2 (MeNH 2 ) 9 (μ‐CN)(Te 2 )] 2 (Te 2 ) ( 3 ) and [Mn 2 (MeNH 2 ) 10 (μ‐CN)] 2 (Te 3 ) 3 · 4MeNH 2 ( 4 ). Under solvothermal conditions in the presence of metallic barium and manganese methylamine partially undergoes dehydrogenation being converted to cyanide ions. In the structure of 1 , Ba 2+ is coordinated by three MeNH 2 ligands and five tellurium atoms of surrounding Te 3 2– anions, which are associated to infinite (Te 3 2– ) n polyanionic chains. 2 is a coordination polymer with Mn(MeNH 2 ) 4 groups connected by Te 2 units to chains [Te–Te–Mn–] n . 3 and 4 are molecular compounds, consisting of cationic dinuclear complexes with almost linear Mn 2+ –CN–Mn 2+ bridges. In the structures 2 – 4 manganese is in octahedral coordination.