ISSN:
1572-9001
Keywords:
Mercury(II) dicarboxylate
;
double betaine
;
1,4-diazoniobicyclo[2.2.2]octane-1,4-diacetate
;
X-ray crystallography
;
polymeric structure
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Three mercury(II) complexes containing double-betaine and halide ligands, [(HgCl2)2(L1)] n (1), [(HgBr2)2(L1)(H2O)2] n (2), and [2HgCl2(HL1)·Hg2Cl6] n (3) [L1=−O2CCH2N+(CH2CH2)3-N+H2CO2 −], have been prepared and shown to have polymeric structures by single-crystal X-ray analysis. Complex (1) exhibits an infinite zigzag chain in which each mercury(II) atom is coordinated by pairs of carboxylate oxygen atoms and chloride ligands in a distorted tetrahedral geometry. In complex (2), the mercury(II) atom is in an unusual square-planar coordination geometry, and weak mercury-ligand and hydrogen bonding extend the structural skeletons into a three-dimensional network. Complex (3) consists primarily of an assembly of HgCl2(HL1) moieties and [Hg2Cl6]− anions, and the mercury(II) atoms are in planar T-shaped and distorted tetrahedral coordination environments, respectively. The resulting three-dimensional network is based on the cross-linkage of nearly planar, wide ribbons running in thea direction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02281231
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