R. Sharma, Sanjeev Kumar, K. Bhasin
1997
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0
Influential Citations
12
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Journal
Zeitschrift Fur Kristallographie
Abstract
The crystal and molecular structure of polymeric magnesium bis(p-nitrophenolate) dihydrate, [Mg(O 2 NC 6 H 4 O) 2 (OH 2 ) 2 ]∞, C 12 H 12 MgN 2 O 8 , has been determined at room temperature. The orange crystals are monoclinic, space group C2 with unit cell dimensions a = 21.183(2) A, b = 3.667(4) A, c = 10.357(2)A, β = 117.227(7)°, Z = 2 and D x = 1.562 Mg m -3 . The structure was solved by direct methods and refined by a full-matrix least-squares procedure on F 2 to final R = 0.062 using 960 reflections. The Mg 2+ cation (which lies on a two-fold axis) exists in a slightly distorted octahedral geometry with the basal plane being defined by four water molecules and the axial positions by two oxygen donor atoms derived from two symmetry related NO 2 groups. Each pair of coordinated water molecules links a neighbouring Mg 2+ centre leading to the formation of columns of edge-shared octahedra. These columns are linked via hydrogen bonding contacts involving the non-coordinating oxygen atoms of the p-nitrophenoxide and the Mg...OH 2 groups.