Two 3D noninterpenetrated chiral coordination polymers with uniform (10~3)-srs and (4~2.6~3.8)-sra nets

摘要

Two new noninterpenetrated three-dimensional chiral coordination polymers [Cu(L-cys)(H_2O)]_n (1) and [Cd(L-cys)(H_2O)]_n (2) (where H_2cys = cysteic acid) have been synthesized and characterized using single-crystal X-ray diffraction, elemental analysis, infrared spectroscopy, and thermogravimetric analysis. In the two complexes, L-cys acts as a μ_3-bridge for 1 and a μ_4-bridge for 2, respectively, to link metal centers in different modes, forming two different three-dimensional networks. The topological analysis of them shows that 1 can be simplified to a three-connected topology with the short symbol of 10~3 and the full vertex symbol of 10_5.10_5.10_5 while 2 a four-connected topology with the short symbol of 4~2.6~3.8 and the full vertex symbol of 4.6.4.6.6.8_2, respectively.