Tansition metal complexes with 2-(1-(carboxymethyl)-2-methyl-1H-benzimidazol-3-ium-3-yl)acetate (HL): Synthesis and crystal structure of [Co(L)2(H2O)4] · 6H2O and [Cu(L)2(H2O)2] · 4H2O

Abstract

Transition metal complexes of 2 (1 (carboxymethyl) 2 methyl 1H benzimidazol 3 ium 3 yl)acetate (HL), namely [Co(L) 2 (H 2 O) 4 ] ⋅ 6H 2 O (I) and [Cu(L) 2 (H 2 O) 2 ] ⋅ 4H 2 O (II), have been synthesized by a hydrothermal procedure and characterized by X ray crystallography, CIF files CCDC nos. 1007524 (I), 1007525 (II). Both I and II are mononuclear molecules. In I, the Co 2+ ion is in octahedral coordiantion envi ronment and surrounded by four O atoms from water molecules and two carboxylate O atoms of two depro tonated ligand (L -) occupied six culmination. While in II, the Cu 2+ ion is located in a square planar geom etry, bounded to two aqua O atoms and two carboxylate O atoms from L -.