Crystal structure of N,Nʹ-ethylene-bis(o-hydroxyacetophenone-iminato- κ6O,Oʹ,N,Nʹ:O,Oʹ-bis(nitrato-κ2O,Oʹ)-dicopper(II), C18H18Cu2N4O8

Abstract

Source of materialAsolution of Cu(NO 3 ) 2 ×3H 2 O(24.2 mg,0.10mmol) in 1mlmeth-anol was slowly added to asolution of N,N-bis(o-hydroxyacetophenone)-l,2-diaminoethane (H 2 L)(14.8 mg, 0.05 mmol) in 3ml methanol with general stirring. The resulting mixture was placed in the dark, and black well shaped crystals were obtained after one day, in ayield of 46% (based on Cu). Experimental detailsHatoms were included in therefinement at calculated positions [C-H aromatic =0.93 Åwith U iso (H) =1.2U eq (C); C-H methyl =0.96 Å with U iso =1.5 U eq (C). DiscussionSchiff bases complexes are an important and popular area of research due to their simple synthesis, versatility, and diverse range of applications [1]. In particularly, alarge number of copper(II)-Schiff basescomplexes have been synthesized and characterized duet ot heir interestingp ropertiesa nd novelt opologies [ 2,3]. Herein, thetitle compound has been synthesized and its crystal structure has also been determined. The molecular structure of the title structure is made up of discrete neutral [Cu 2 (L)(NO 3 ) 2 ]. The metal center Cu(1) is sixfold coordinated by two phenoxo oxygen atomsand four oxygen atomsfrom two NO 3 -.The second metal center Cu(2) is coordinated to two phenoxo oxygen atomsa nd two imine nitrogen atomsf rom one ligand to exhibit as quare plane geometry. In the title complex, the bond lengths of Cu-O are in the range of 1.892(1) Åto2.426(2) Å, and the Cu-N bond distance is 1.910(2) Å, which are normally observed in Cu(II) complexes [4].