Syntheses and structures of piperazin-1-ium ABr2 (A = Cs or Rb): hybrid solids containing `curtain wall' layers of face- and edge-sharing ABr6 trigonal prisms

Rickaby, K.A.; Slawin, A.M.Z.; Harrison, W.T.A.

doi:10.1107/S2056989019010375

Acta Crystallographica Section E
Acta Crystallographica
Section E CRYSTALLOGRAPHIC COMMUNICATIONS

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Figure 1
The asymmetric unit of (I)

showing 50% displacement ellipsoids expanded to show the complete organic cation and the caesium coordination polyhedron. The N—H⋯Br hydrogen bond is shown as a double-dashed line. The purple lines linking the bromine atoms emphasize the trigonal–prismatic shape of the CsBr₆ polyhedron. Symmetry codes: (i) x, y, $[{1\over 2}]$ − z; (ii) x − 1, y, $[{1\over 2}]$ − z; (iii) x − 1, y, z.

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 75| Part 8| August 2019| Pages 1249-1252

https://doi.org/10.1107/S2056989019010375

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