Citation:
LI Rong-Fang, WANG Yu-Fang, LIU Xin-Fang, FENG Xun, ZHANG Xiao-Yu, DU De-Guang. A One-dimensional Cobalt Coordination Polymer Based on Biphenyl-2,3,3',5'-tetracarboxylic Acid and N-donor Ancillary Ligands: Crystal Structure and Magnetic Property[J]. Chinese Journal of Structural Chemistry,
2016, 34(10): 1558-1564.
doi:
10.14102/j.cnki.0254-5861.2011-0681
A One-dimensional Cobalt Coordination Polymer Based on Biphenyl-2,3,3',5'-tetracarboxylic Acid and N-donor Ancillary Ligands: Crystal Structure and Magnetic Property
摘要:
Hydrothermal reactions of biphenyl-2,3,3',5'-tetracarboxylic acid (H4bptc) with cobalt salt in the presence of 1,4-bis(2-pyridylmethyl)piperazin(bpmp) afforded one novel coordination polymer, namely, [Co(H2bptc)(bpmp)0.5(H2O)]n (1). Its structure was established by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR spectra and TG analysis. Complex 1 crystallizes in monoclinic, space group P21/c with a=11.4839(11), b=16.6690(16), c=11.5559(11) Å, V=2201.8(4) Å3, Mr=539.35, Dc=1.627 g/cm3, μ(MoKα)=0.841 mm-1, F(000)=1108, Z=4, the final R=0.0309 and wR=0.0705 for 4090 observed reflections (I>2σ(I)). Complex 1 displays a one-dimensional (1D) chain bridged by bpmp. Two carboxylic groups of H4bptc ligand adopt μ1-η1:η1 and μ1-η1:η0 coordination modes to bridge adjacent Co(II) ions together with bpmp ligand to give alternately arranged left-and right-handed helical chains. In addition, variable-temperature magnetic susceptibility measurements indicate that complex 1 shows weak antiferromagnetic interactions between the adjacent Co(II) ions.
English
A One-dimensional Cobalt Coordination Polymer Based on Biphenyl-2,3,3',5'-tetracarboxylic Acid and N-donor Ancillary Ligands: Crystal Structure and Magnetic Property
Abstract:
Hydrothermal reactions of biphenyl-2,3,3',5'-tetracarboxylic acid (H4bptc) with cobalt salt in the presence of 1,4-bis(2-pyridylmethyl)piperazin(bpmp) afforded one novel coordination polymer, namely, [Co(H2bptc)(bpmp)0.5(H2O)]n (1). Its structure was established by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR spectra and TG analysis. Complex 1 crystallizes in monoclinic, space group P21/c with a=11.4839(11), b=16.6690(16), c=11.5559(11) Å, V=2201.8(4) Å3, Mr=539.35, Dc=1.627 g/cm3, μ(MoKα)=0.841 mm-1, F(000)=1108, Z=4, the final R=0.0309 and wR=0.0705 for 4090 observed reflections (I>2σ(I)). Complex 1 displays a one-dimensional (1D) chain bridged by bpmp. Two carboxylic groups of H4bptc ligand adopt μ1-η1:η1 and μ1-η1:η0 coordination modes to bridge adjacent Co(II) ions together with bpmp ligand to give alternately arranged left-and right-handed helical chains. In addition, variable-temperature magnetic susceptibility measurements indicate that complex 1 shows weak antiferromagnetic interactions between the adjacent Co(II) ions.
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