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Abstract
The synthesis of the complex Cadmium 1-hydroxyethylidene-1, 1-bisphosphonate dehydrated Cd(HEBP).2H2O is described. This compound crystallizes with the monoclinic P21/n (n°14)group and a = 14.229(3)Å, b equals; 5.613(1)Å;, c equals; 11.521(3)Å, β equals; 93.06(1)°, V equals; 918.8(4) Å3, Z equals; 4. Cd is sixfold coordinated. It is bonded to one tridentate, one bidentate and one monodentate (HEBP)2− ligands. The structure is made up of chains of summit-sharing CdO6 polyhedra along the [010] direction. These chains are linked together through hydrogen bonds involving the water molecules. (HEBP)2− ligands are only linked together by weak hydrogen bonds involving also and exclusively the water molecules. The complex Hg(HEBP).2H2O synthesized by the same method is isostructural; the cell parameters are: a=14.346(4) Å, b =5.692(2) Å, c =11.621(4)Å, β=95.17(2)°, V =945(1)Å3.
