Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (6): 745.

• Articles • Previous Articles     Next Articles

Synthesis, Crystal Structure and Properties of TAAB Nickel Adducts with Axial N-Base Ligands

LI Ming-Xing1, XU Zheng1, LI Jin-Yu1, YOU Xiao-Zeng1, WANG Hua-Qin1, YANG Yue1, YU Yun-Peng2, ZHU Duo-Lin2   

  1. 1. Coordination Chemistry Institute, Coordination Chemistry State Key Laboratory, Center for Materials Analysis, Nanjing University, Nanjing, 210008;
    2. Department of Chemistry, Zhenjiang Normal College, Zhenjiang, 212003
  • Received:1992-10-05 Revised:1992-11-29 Online:1993-06-24 Published:1993-06-24

Abstract: Four adducts of Py, Im, DMFand 4,4'-bipy with Ni(TAAB)2+, where TAAB=tetraben-zo[b,f,j,R][1,5,9,13]tetraazacyclohexadecine, were synthesized and characterized by elementary analysis, IRand thermal analysis.The crystal structure of [Ni(TAAB)(Py)2](BF4)2has been determined.The crystal belongs to a monoclinic system with space group P21/n, α=1.6465(6) nm, b=1.2486(5) nm, c=2.0219(1) nm,β=113.79°, V=3.8039 nm3, Z=4, R=0.068.TAABmacrocyclic ligand presents a decidedly saddle-shaped appearance.The planes of two pyridine molecules are perpendicular to each other.The bond distances of Ni-N(n)(n=10,20,30,40) are in the range of 0.1983-0.2043 nm while the bond distances of Ni-N(B)(n=5,6) are 0.2182-0.2189 nm, forming a distorted octahedron coordination geometry around nickel ion.The variable-temperature magnetic susceptibility of 4,4'-bipyridine-bridging nickel TAABcomplex obeys the Curi-er-Weiss law (θ=- 44 K) and indicates an antiferromagnetic exchange interaction between nickel ions.

Key words: Axial coordination, TAAB macrocyclic, Nickel complex, Crystal structure, Magnetic exchange interaction

TrendMD: