Acta Cryst. (2005). E61, m2431-m2433  [ doi:10.1107/S1600536805034604 ]

Bis[(1,4,7,10,13,16-hexaoxocyclooctadecane)caesium(I)] di-₂-diselenido-bis[selenidoarsenate(III)]

T. Van Almsick and W. S. Sheldrick

Abstract: The title compound, [Cs(C₁₂H₂₄O₆)]₂[As₂Se₆], contains two independent centrosymmetric [As₂Se₆]^2- counter-anions, in which AsSe₃ pyramids are linked by two Se-Se bonds into a chair-shaped six-membered ring. Four of the Se atoms of the first [As₂Se₆]^2- anion coordinate the Cs atoms of dimeric [{Cs(18-crown-6)}₂(-As₂Se₆)] units that are joined by additional OCs interactions into polymeric sheets. In contrast, all six Se atoms of the second [As₂Se₆]^2- anion coordinate Cs atoms within discrete [{Cs(18-crown-6)}₂(-As₂Se₆)] dimers.

Online 31 October 2005

Copyright © International Union of Crystallography
IUCr Webmaster