A Diphenoxo-bridged Ferromagnetic Copper(Ⅱ) Dimer Based on N-(2-Hydroxybenzyl)salicylaldimine

【摘要】 A new dinuclear copper(Ⅱ) complex,[Cu(L)(py)]2 1(H2L = N-(2-hydroxybenzyl)-salicylaldimine,py = pyridine),has been synthesized and characterized by elemental analysis,IR and UV spectra.1 crystallizes in space group P21/n with a = 8.2106,b = 10.715,c = 17.864 ,β = 99.365°,V = 1550.7 3,Z = 4,C19H16CuN2O2,Mr = 367.88,Dc = 1.576 g/cm3,μ(MoKα) = 1.422 mm-1,F(000) = 756,the final R = 0.0280 and wR = 0.0746.Complex 1 is a centrosymmetric dimer with two copper(Ⅱ) centers,two py ligands and two L2-ligands.Each L2- ligand donates its azomethine nitrogen and one of the phenolate groups to one copper(Ⅱ) ion and shares the other phenolate group between the two copper(Ⅱ) ions,affording a Cu2O2 plane.Each copper(Ⅱ) center has a slightly distorted square pyramidal geometry with a bridging phenolate group at the apex.Magnetic studies suggest the presence of a weak ferromagnetic interaction via two phenoxo bridges.The magnetic susceptibility data(2～300 K) of complex 1 were analyzed by means of ■ = -2J12-DZ.The least-squares fitting of the data to the theoretical equation leads to J = 10.3 cm-1,g = 2.03,D = 0.67 cm-1 and R = ∑(χobsd - χcalcd)2/∑χobsd2 = 2.76 × 10-3.更多还原

【Abstract】 A new dinuclear copper(Ⅱ) complex,[Cu(L)(py)]2 1(H2L = N-(2-hydroxybenzyl)-salicylaldimine,py = pyridine),has been synthesized and characterized by elemental analysis,IR and UV spectra.1 crystallizes in space group P21/n with a = 8.2106,b = 10.715,c = 17.864 ,β = 99.365°,V = 1550.7 3,Z = 4,C19H16CuN2O2,Mr = 367.88,Dc = 1.576 g/cm3,μ(MoKα) = 1.422 mm-1,F(000) = 756,the final R = 0.0280 and wR = 0.0746.Complex 1 is a centrosymmetric dimer with two copper(Ⅱ) centers,two py ligands and two L2-ligands.Each L2-ligand donates its azomethine nitrogen and one of the phenolate groups to one copper(Ⅱ) ion and shares the other phenolate group between the two copper(Ⅱ) ions,affording a Cu2O2 plane.Each copper(Ⅱ) center has a slightly distorted square pyramidal geometry with a bridging phenolate group at the apex.Magnetic studies suggest the presence of a weak ferromagnetic interaction via two phenoxo bridges.The magnetic susceptibility data(2～300 K) of complex 1 were analyzed by means of ■ = -2J12-DZ.The least-squares fitting of the data to the theoretical equation leads to J = 10.3 cm-1,g = 2.03,D = 0.67 cm-1 and R = ∑(χobsd – χcalcd)2/∑χobsd2 = 2.76 × 10-3.更多还原