Synthesis, Crystal Structure and Magnetic Properties of a Cobalt(Ⅱ) Coordination Polymer with 4,4＇-(Propane-2,2-diyl)dibenzoate and 4,4＇-Bis(1-imidazolyl)biphenyl

摘要

A novel coordination polymer,{[Co(CBA)(BIMB)_(0.5)]·H_2O}_n(1,H_2CBA=4,4'-(propane-2,2-diyl)dibenzoic acid,and BIMB=4,4'-bis(1-imidazolyl)biphenyl),has been hydrothermally prepared and characterized by IR spectroscopy,elemental analysis and single-crystal X-ray diffraction.The crystal is of monoclinic system,space group P2/c with a=14.909(3),b=7.1963(15),c=24.592(5)A,β=104.312(2)°,V=2556.5(9)A^3,C_(26)H_(23)N_2O_5Co,M_r=502.39,D_c=1.305 g/cm^3,F(000)=1040,μ=0.708 mm^(-1)and Z=4.The final R=0.0580 and wR=0.1605 for3228 observed reflections(I>2σ(I)).Single-crystal structure analysis shows that complex 1 exhibits a three-dimensional 2-fold interpenetrating pillared helical-layer open framework ofα-Po topology based upon binuclear paddlewheel units.Moreover,its magnetic properties have also been investigated.