Nitrate Ions Templated 3D Noninterpenetrating 6-Connected pcu Net: Synthesis, Structure and Properties

A new Co(II) coordination polymer, namely [Co-0.5(bix)(1.5)](n)center dot n(NO3)center dot 2n(H2O) (1 bix = 4,4 '-bis(imidazol-1-ylmethyl)benzene), has been successfully synthesized and structurally characterized. Single-crystal X-ray analysis reveals that the crystal belongs to triclinic crystal system, P-1 space group with a = 9.3078(9), b = 9.9938(10), c = 13.2647(14) angstrom, alpha = 78.154(9)degrees, b = 73.742(9)degrees and gamma = 82.751(8)degrees. In the complex, bix ligands acting as bridges link the Co(II) ions into a three-dimensional (3D) 6-connected anionic framework, and the nitrate ions, which not only act as charge balance ions but also act as template in the process of self-assembly, did not involve in coordinating to Co(II) ions.