Acta Cryst. (2008). E64, m399-m400  [ doi:10.1107/S1600536807066597 ]

catena-Poly[[tetrakis(hexamethylphosphoramide-O)bis(nitrato-²O,O')lanthanum(III)] [silver(I)-di-₂-sulfido-tungstate(VI)-di-₂-sulfido]]

G. Tang, J. Zhang, C. Zhang and L. Lu

Abstract: Hexamethylphosphoramide (hmp), tetrathiotungstate(VI), silver sulfide and lanthanum(III) nitrate are self-assembled to form discrete cations one-dimensional poylmeric anionic chains [AgWS₄]_n^n- in the title compound, {[La(NO₃)₂(C₆H₁₈N₃OP)₄][AgWS₄]}_n. The central La atom in the cation is coordinated by eight O atoms from two nitrate and four hmp ligands. Together with the two nitrate ligands, the cation is monovalent, which leads to the anionic chain having a monovalent repeat unit. The polymeric anionic chain with WAgW and AgWAg angles of 165.94 (3) and 155.894 (14)° presents a distorted linear configuration. Five N atoms, 18 C atoms and their attached H atoms are disordered equally over two positions.

Online 23 January 2008

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