Synthesis and Crystal Structure of a 1-D Coordination Polymer {[Cu(NIT4py)_2(ip)]·6H_2O}_·n

摘要

A new complex {[Cu(NIT4py)_2(ip)]·6H_2O}_n (NIT4py=2-(4′-pyridinyl)-4,4,5,5-tetra methylimidazoline-1-oxyl-3-oxide and ip = isophthalate dianion) has been synthesized and structurally characterized by X-ray diffraction. It crystallizes in orthorhombic, space group Cmcm with a = 25.161(3), b =10.045(1), c = 15.450(2) A, C_(32)H_(48)N_6O_(14)Cu, M_r = 804.30, V = 3904.8(8) A~3, Z = 4, D_c = 1.368 g/cm~3, μ(MoKα) = 0.630 mm~(-1), F(000) = 1692, the final R = 0.0326 and wR = 0.0787 for 1843 independent reflections with R_(int) = 0.0372. Each Cu(II) ion is four-coordinated by two car-boxylate oxygen atoms and two pyridyl-N atoms from NIT4py radicals to furnish a rhombus geometry. The central Cu(II) ion is located at an inversion center and a crystallographic two-fold axis. Each isophthalate dianion binds two Cu(II) ions in bis-monodentate mode, leading to a 1-D chain, a these 1-D chains are further linked into a 2-D network via hydrogen-bonding interactions.