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Synthesis, crystal and electronic structure of the new sodium chain sulfido cobaltates(II), Na~3~CoS~3~ and Na~5~[CoS~2~]~2~(Br) by Pirmin Stüble; Jan P. Kägi; Caroline Röhr is a Chemistry article available to read on EtoBox.

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## Abstract The sulfido cobaltate(II) Na~3~CoS~3~ was synthesized from stoichiometric quantities of Na~2~S, elemental cobalt and sulfur at a maximum temperature of 1100°C. According to Na~3~CoS~3~=Na~12~[Co~2~S~5~(S~2~)][Co~2~S~3~(S~2~)] the orthorhombic structure of a new type (space group __Cmc__2~1~, __a__=884.24(2), __b__=2177.38(5), __c__=1193.20(3) pm, __Z__=12, __R__1=0.0205) contains two different anions: i. dimers [Co~2~S~5~(S~2~)]^8−^ of two edge-sharing [CoS~4~] tetrahedra with five sulfido and one __η__ ^1^-disulfido ligand; ii. chains ∞ 1 [ Co 2 S 3 ( S 2 ) ] 4 − $\_\infty ^1{[{\rm{C}}{{\rm{o}}\_2}{{\rm{S}}\_3}({{\rm{S}}\_2})]^{4 - }}$ of [CoS~4~] tetrahedra connected via __μ__-sulfido (3×) besides __μ__-1,2-disulfido (1×) ligands. The second title compound, Na~5~[CoS~2~]~2~(Br), which has been likewise synthesized as a pure phase from stoichiometric quantities of Na~2~S, Co, S and NaBr, is isotypic to Na~5~[CoS~2~]~2~(S) (Na~6~PbO~5~ type; tetragonal, space group __I__4__mm__, __a__=914.58(7), __c__=625.59(5) pm; __R__1=0.0412). The structure contains linear chains ∞ 1 [ CoS 4 / 2 ] 2 − $\_\infty ^1{[{\rm{Co}}{{\rm{S}}\_{4/2}}]^{2 - }}$ running along the tetragonal __

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Author

Pirmin Stüble; Jan P. Kägi; Caroline Röhr

Publisher

Walter de Gruyter GmbH

Published

2016

Language

EN

Field

Chemistry (Physical Sciences)