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catena-Poly[[[triaquacalcium(II)]-di-μ-glycine-κ4O:O′] diiodide]

✍ Scribed by Natarajan, S. ;Shanmugam, G. ;Dhas, S. A. Martin Britto ;Athimoolam, S.

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
552 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

In the crystal structure of the title compound, {[Ca(C 2 H 5 -NO 2 ) 2 (H 2 O) 3 ]I 2 } 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.

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