Acta Cryst. (2007). E63, m2897-m2898  [ doi:10.1107/S1600536807051884 ]

catena-Poly[[[triaquacalcium(II)]-di--glycine-⁴O:O'] diiodide]

S. Natarajan, G. Shanmugam, S. A. M. B. Dhas and S. Athimoolam

Abstract: In the crystal structure of the title compound, {[Ca(C₂H₅NO₂)₂(H₂O)₃]I₂}_n, there are two formula units per asymmetric unit; both calcium cations are sevenfold coordinated within irregular polyhedra. The polyhedra can be divided into two halves as square pyramidal and triangular prismatic due to the presence of one and two coordinated water molecules above and below the square plane. In all the glycine zwitterions, the amino groups form three two-centred hydrogen bonds, leading to a class I hydrogen-bonding pattern. The backbone conformations of the amino acids are cis and trans.

Online 7 November 2007

Copyright © International Union of Crystallography
IUCr Webmaster