Abstract
A new complex with the formula [Co(acac)2(NITQ)2]⋅2CH2Cl2 1 (acac = acetylacetone, NITQ = 2-(2 -quinoxalinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), was synthesized and elucidated structurally as well as magnetically in detail. The crystal belongs to the monoclinic system, space group P21/c with a = 9.6896(1), b = 20.539(4), c = 12.147(2) A, β = 93.84(3)°, Mr = 997.65, V = 2412.1(8) A, Z = 2, Dc = 1.374 g/cm, F(000) = 1038, μ = 0.635 mm, the final R = 0.0539 and wR = 0.1289 for 5998 observed reflections (I > 2σ(I)). The Co(II) ion is coordinated by two nitrogen atoms of quinoxaline rings from two NITQs and four oxygen atoms from two acac ions to complete a distorted octahedral coordination environment. Compound 1 is further linked into a three-dimensional (3D) supramolecular network by hydrogen-bonding, Cl⋅⋅⋅O weak contact and π···π stacking interactions. The magnetic measurements show compound 1 exhibits weak ferromagnetic interactions.
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