Abstract
ABSTRACT Two centrosymmetric mononuclear nickel(II) and zinc(II) complexes, [NiL 2 ]∙2NO 3 (1) and [ZnL 2 (dca) 2 ] (2), where L is the zwitterionic form of 2-bromo-6-[(3-cyclohexylaminopropylimino)methyl]phenol, and dca is the dicyanamide anion, have been synthesized. The complexes have been characterized by physico-chemical methods and single crystal X-ray determination. Complex (1) crystallizes in the monoclinic space group P 2 1 / n with unit cell dimensions a = 7.0091(7) A, b = 11.137(1) A, c = 23.997(2) A, β = 97.390(3)°, V = 1857.7(3) A 3 , Z = 2, R 1 = 0.0617, and wR 2 = 0.1632. Complex (2) crystallizes in the triclinic space group P -1 with unit cell dimensions a = 8.762(1) A, b = 10.386(1) A, c = 10.687(2) A, α = 85.209(2)°, β = 83.931(2)°, g = 88.734(2)°, V = 963.6(2) A 3 , Z = 1, R 1 = 0.0374, and wR 2 = 0.0873. The Ni atom in (1) is in a square planar geometry, and the Zn atom in (2) is in an octahedral geometry. The preliminary antibacterial activities of the complexes were assayed.
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