Crystal structure of chlorobis(1,10-phenanthroline)zinc(II) Perchlorate monohydrate, [ZnCl(C12H8N2)2]ClO4 · H2O

Abstract

C24Hi8Cl2N405Zn, monoclinic, P\2\ln (no. 14), a = 11.375(2) A, b = 15.383(2) A, c = 13.026(2) A, β = 94.718(2)°, V = 2271.4 A, Ζ = 4, Rgl(F) = 0.048, wRreffF) = 0.103, T= 120 K. Source of material A methanolic solution of 1,10-phenanthroline (0.400 g, 2 mmol) and sodium Perchlorate (0.123 g, 1 mmol) and sodium trichloroacetate (0.230 g, 1 mmol) was added to a solution of the zinc(II) acetate (0.183 g, 1 mmol) in methanol. The resulting solution was concentrated on water bath and cooled to room temperature, when white crystalline compounds were separated. The crystals were filtered off, washed with cold acetone and dried over silica gel (yield 0.207 g, 50 %). Elemental analysis: found C, 49.30 %; H, 3.20 %; N, 9.45; calc. for C24Hi8Cl2N405Zn C, 49.69 %; H, 3.11 %;N, 9.67%. Discussion Numerous zinc(II) complexes with nitrogen or oxygen donor ligands have been synthesized and studied [1]. Some of these complexes are considered as structural models for the active site in enzymes. A major reason for the importance of zinc in enzyme chemistry is its ability to adopt coordination numbers of 4 ,5 or 6 in its complexes and to change its coordination geometry comparatively easily [2]. Crystal: