Supramolecular Sheet Co(Ⅱ) Complex Assembled by Hydrogen Bond

摘要

The title complex,[[Co(Py)2(H2O)2(NO3)2]]n(1)was synthesized by liquid/liquid diffusion method at room temperature.The complex crystallizes in monoclinic,space group P2(1)/C,with a=0.877 5(6)nm,b=1.171 5(8)nm,c=0.751 8(5)nm,V=0.739 3(9)nm3,C10H14CoN4O8,Mr=377.18,Dc=1.694 g/cm3,μ=1.210 mm-1,F(000)=386,Z=2,the final R=0.022 9 and wR=0.066 1 for 3 137 observed reflections(I>2σ(I)).In the structure of 1,the center atom of cobalt revealed a centrosymmetric,six-coordinate structure,with two Py ligands,two monodentate nitrate groups and two water molecules.It is notable that a series of hydrogen bonds(O-H…O)formed two kinds of rings exist in the structure,which linked neighboring six-coordinate polymer into a two-dimensional H-bonding network,and then assembled into a three-dimensional supramolecular architecture through electrostatic and hydrophobic interaction.In the structure,supramolecular sheet was observed,which contains alternative organic and inorganic layers.