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A new compound (NIT-mNO2 = 4,4,5,5-tetramethylimidazoline-2-yl-(2’-chlor-5’- nitrophenyl)-3-oxide-1-oxyl) 1 and its complex (Cu(NIT-mNO2)(hfac)2) 2 have been synthesized and structurally and magnetically characterized. Complex 1 crystallizes in monoclinic, space group P21/n with a = 10.6798(9), b = 11.2705(9), c = 12.9559(10) , β = 107.3770(10)o, V = 1488.3(2) 3, C13H15ClN3O4, Mr = 312.73, Z = 4, Dc = 1.396 g/cm3, μ(MoKa) = 0.276 mm-1, F(000) = 652, the final R = 0.0606 and wR = 0.1773 for 3405 independent reflections with Rint = 0.0203. The nitronyl nitroxide unit (imidazoline ring) is not coplanar with the phenyl ring with the dihedral angle between them of 55.75o. The compound results in a 1-D zig-zag chain structure by intermolecular H-bond interaction. Compound 2 crystallizes in triclinic, space group P1 with a = 10.3699(10), b = 10.6286(11), c = 15.1683(15), α = 77.5330(10), β = 773080(10), γ = 87.3420(10)o, V = 1592.5(3) 3, C23H17ClF12N3O8Cu, Mr = 790.39, Z = 2, Dc = 1.648 g/cm3, μ(MoKa) = 0.888 mm-1, F(000) = 788, the final R = 0.0793 and wR = 0.2153 for 5794 independent reflections with Rint = 0.0196. The Cu(II) ion is located at a center of symmetry, and each Cu(II) is surrounded by six oxygen atoms at the vertices of a distorted tetragonal octahedron. Four of the six oxygen atoms belong to two hfac ligands and occupy the equatorial coordination sites, while the other two of NIT-mNO2 act as μ-1,5 bridge between the Cu(II) ion, thus forming a 1-D chain structure. The magnetic susceptibility data indicate intermolecular antiferromagnetic interactions between compound 1 and intrachain ferromagnetic behaviors.
A new compound (NIT-mNO2 = 4,4,5,5-tetramethylimidazoline-2-yl- (2’-chloro- 5’-nitrophenyl) Complex 1 crystallizes in monoclinic space group P21 / n with a = 10.6798 (9), b = 11.2705 (9), c = 12.9559 (10) (10) o, V = 1488.3 (2) 3, C13H15ClN3O4, Mr = 312.73, Z = 4, Dc = 1.396 g / cm3, μ (MoKa) = 0.276 mm-1, = 652, the final R = 0.0606 and wR = 0.1773 for 3405 independent reflections with Rint = 0.0203. The nitronyl nitroxide unit (imidazoline ring) is not coplanar with the phenyl ring with the dihedral angle between them of 55.75o. The compound results in a 1-D zig-zag chain structure by intermolecular H-bond interaction. Compound 2 crystallizes in triclinic space group P1 with a = 10.3699 (10), b = 10.6286 (11), c = 15.1683 77.5330, β = 773080 (10), γ = 87.3420 (10) o, V = 1592.5 (3) 3, C23H17ClF12N3O8Cu, Mr = 790.39, Z = The final R = 0.0793 and wR = 0.2153 for 5794 independent reflections with Rint = 0.0196. The Cu (II) ions are located at Dc = 1.648 g / cm 3, μ MoKa = 0.888 mm -1, F (000) = 788, at a center of symmetry, and each Cu (II) is surrounded by six oxygen atoms at the vertices of a distorted tetragonal octahedron. Four of the six oxygen atoms belong to two hfac ligands and occupy the equatorial coordination sites, while the other two of NIT-mNO2 act as μ-1.5 bridge between the Cu (II) ion, thus forming a 1-D chain structure. The magnetic susceptibility data indicates that intermolecular antiferromagnetic interactions between compound 1 and intrachain ferromagnetic behaviors.