SYNTHESIS AND CRYSTAL STRUCTURE OF MERCURY(II) CHLORIDE-FERRON (7-IODO-8-HYDROXYQUINOLINE-5-SULFONIC ACID) ADDUCT

摘要

A mercury(II) chloride adduct of ferron (7-iodo-8-hydroxyquinoline-5-sulfonic acid), [HgCl_2 (C_9H_6INO_4) centre dot H_2O] has been synthesized and characterized by X-ray diffraction analysis and spectroscopic studies. The compound crystallizes in P2_1/c space group, a =8.919(3), 6 = 23.216(3), c = 7.714(3)A, beta = 95.79(3) deg. The coordination geometry around mercury is distorted square planar [(2+2) coordination] with two short Hg-Cl bonds [2.308(2) and 2.309(18) A] and two long Hg-O(sulfonate) [2.738(4) A] and Hg-O(water) [2.889(4) A] bonds. The sulfonic group is deprotonated, the proton having migrated to the quinoline N atom that forms intermolecular hydrogen bonds. The inversion related organic ligands are stacked over one another. The crystal structure is further stabilized by a C-H...O, O-H...O and N-H...O hydrogen bonds.