SYNTHESES, CRYSTAL STRUCTURES AND UREASE INHIBITORY ACTIVITIES OF ZnII AND NiII COMPLEXES DERIVED FROM 4,4′-DIMETHOXY-2,2′-(PROPANE-1,3- DIYLDIIMINODIMETHYLENE)DIPHENOL

Abstract Two new zinc(II) and nickel(II) complexes, [Zn 2 L(μ 2 -η 1 :η 1 -CH 3 COO)(μ 2 -η 1 :η 2 -CH 3 COO)] n ( 1 ) and [Ni 2 (HL) 2 (H 2 O) 2 (μ 1,3 -N 3 )]Cl·2H 2 O ( 2 ·2H 2 O), where L is the doubly deprotonated form of 4,4′-dimethoxy-2,2′-(propane-1,3-diyldiiminodimethylene)diphenol (H 2 L), were synthesized and characterized by elemental analyses, infrared and electronic spectroscopy, as well as single crystal X-ray diffraction. Complex 1 is a bidentate bridging and chelating bridging acetate bridged polymeric zinc complex. In the asymmetric unit of the complex, one Zn atom is in distorted trigonal bipyramidal coordination, and the other one is in octahedral coordination. Complex 2 ·2H 2 O is an end-to-end azide bridged dinuclear nickel complex. The Ni atoms are in octahedral coordination. The inhibitory property on Jack bean urease of the complexes was studied, and the nickel complex has effective activity.