CRYSTAL AND MOLECULAR-STRUCTURE OF BETA-RESORCYLIDENE AMINOGUANIDINE COPPER(II) COMPLEX

The tridentate Schiff base, beta-resorcylidene aminoguanidine (RAG) 1 was synthesized from 2,4-dihydroxybenzaldehyde and aminoguanidine and complexed with copper(II) to form a copper(II)-beta-resorcylidene amin oguanidine (Cu-RAG)2 complex. X-ray diffraction analysis of compound 2 (orthorhombic, Pnma, a = 11.674(1); b = 6.7198(7); c = 17.836(2) Angs trom) revealed a square-planar copper(II) cation with a tridentate lig and bound through two nitrogen atoms (N1 and N3) of the aminoguanidine moiety and an oxygen (O1) of the monodeprotonated dihydroxybenzaldehy de function. The remaining coordination site was occupied by chloride and the structure was rigidly planar as demanded by the restrictions o f the crystallographic space group. The unit cell contents exhibited a n extended sheet-like structure constructed via hydrogen bonds both in termolecularly and involving two water molecules (O3 and O4) also rest ricted by the same mirror symmetry. The remaining water (O5) provided for interlayer hydrogen bonding.