Synthesis,crystal structure and ferromagnetic properties of a novel acetate bridged dicadmium(II) complex with nitronyl nitroxide

The novel dinuclear cadmium(II) complex Cd₂(NIT-1′-MeBzIm)₂(CH₃COO)₄] (I), where NIT-1′-MeBzIm = 2-{2′-(1′-methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, has been prepared and structurally characterized by single-crystal X-ray diffraction. The complex crystallizes in monoclinic crystal system, space group C2/c, Z = 4. Crystal data: C₃₈H₅₀Cd₂N₈O₁₂, M _r = 1035.66, a = 18.6492(16), b = 11.9605(10), c = 19.9208(17) Å, β = 92.1650(10)°. The X-ray analysis reveals that two Cd(II) atoms were bridged by two acetate groups to form a centrosymmetric Cd(II)-Cd(II) dinuclear entity, Cadmium atom is six-coordinated with a distorted octahedral geometry. The complex is linked by intermolecular hydrogen bonds leading to a 2D network configuration. Magnetic investigation indicates the existence of weak intramolecular interactions; i.e., the complex I is ferromagnetic with J = 1.97 cm^?1.