disorder of lattice solvent molecules in the structure of hexaaqua(μ2-1,2,4,5-benzenetetracarboxylato)-bis(2,2’-dipyridylamine)dinickel(ii) hexahydrate dmso solvate

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2007
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Abstract
The crystal structure of the complex [Ni2 (btc)(dipya)2(H2O)6]×6H2O·DMSO (btc = tetra-anion of 1,2,4,5-benzenetetracarboxylic acid, dipya = 2,2’-dipyridylamine) was refined in the triclinic system, space group P , using low temperature (170 K) X-ray diffraction data. The compound consists of binuclear complex entities and la­ttice solvent molecules making pseudo-layers parallel to the 101 plane and channels parallel to the b-axis. The observed structural features were compared with the pre­viously reported results and formula [Ni2(btc)(dipya)2(H2O)6]×4H2O based on room temperature X-ray diffraction data. A possible arrangement of the disordered lattice solvent molecules located in the structural channels is described and discussed. It is concluded that the layout of these molecules is non-centrosymmetric, although the remaining and main part of the structure is centrosymmetric.
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Authors ;DEJAN POLETI;LJILJANA KARANOVIC;ALEKSANDAR KREMENOVIC;JELENA ROGAN
Journal meditsinskaia radiologiia
Year 2007
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