A novel cobalt(Ⅱ) complex with biphenyl-3,3',4,4'-tetracarboxylic acid (H4bptc) and 2-phenyl-1,3,7,8-tetraazacyclopenta[1]-phenanthrene (ptcp), {[Co (H2bptc) (ptcp) (H2O)2]·H2O}n (1), has been synthesized by hydro- thermal method and was characterized by elemental analysis, single crystal X-ray diffraction and thermal gravimetry (TG). It crystallizes in monoclinic, space group Pn with αa=0.719 44(14) nm, 6 = 1.2594(3) nm, c=1.681 9(3) nm,β=93.30(3)°, V=1.521 5(5) nm3, Z=2, C35H26CoN4O11,, Mr=737.53, Dc 1.610 g·cm3-,μ(Mo Kα)=0.639 mm-1, F(000)=758,S=1.024, R1=0.076 7 and wR2=0.120 6. The structural analyses reveal that the title complex is a 1D zigzag chain strcture along the c axis, which is stacked to furnish a three-dimensional supramolecular net structure via hydrogen bonding interactions. CCDC: 793796.
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