| In contrast to rigid bipyridyl ligand, the conformation, bidentate angle of flexible ligands are easily modified when self-assembly with metal ions. The influence of the environment conditions can alter the structure of the coordination polymers, thus, it is difficult to predict the structure of final complex. So they can construct various, novel supramoleculer structure and will open a new field of the supramoleculer chemistry.In the work,we reported eight coordination polymers forming using flexible ligands 1,2-bis(benzotriazole-1-yl)ethane and transition metal cations Co(â…¡), Zn(â…¡), Cu(â…¡), Ni(â…¡), Cd(â…¡) and Ag(â… ), namely, [Co(bbta)2(NCS)2(CH3OH)2 ] (1), [Co(bbta)3(NCS)2]n (2), [Cd1.5(bbta)1.5(NCS)3]n(3), [Zn(bbta)(NCS)2]n(4), [Cu(bbta)Cl2]n (5), [Ag(bbta)(NO3)]n (6), {[Ag(bbta)(NO3)] ·H2O}n(7), [Ag(1,2'-bbta)(NO2)]n(8).They have been synthesized and characterized by elementary analyses, IR, and X-ray diffraction analyses. Bbta ligand has been synthesized and characterized by elementary analyses, IR and thermogravi -metric analyses and X-ray diffraction analyses. It shows the flexible ligand usually function as bridge to connect two centers and form one-dimensional structure. To form complexes in thermodynamic or kinetic steady, the flexible ligand may modify itself conformation. In the work, we also obtained different structure complexes by using different metal ions, synthesis methods, anion and solvent.
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