A new tridentate Ni(Ⅱ) complex {Ni(H2O)3[Ph2(o-Ph-N-C7H7N)]PO}Cl2 was synthesized by the reaction of a new ligand Ph2(o-Ph-N-C7H7N)]PO with NiCl2 in C H3CH2OH. The complex was characterized by X-ray single crystal diffraction. The crystal structure of the complex belongs to monoclinic space group P21/n, a=1.25 9 28(9) nm, b=1.201 24(8) nm, c=2.039 03(14) nm, V=3.016 8(4) nm-3, Z=4, and R1= 0.047 1, wR2=0.120 5. And a molecular CH2Cl2 is filled in the crystal structure. CCDC: 241832.
