Citation:
OU Guang-Chuan, HUANG Zhong-Wen, PAN Ze-Yi, ZHOU Dong-Lai, YUAN Xian-You. Synthesis and Characterization of Two Binuclear Macrocyclic Zinc(Ⅱ) Complexes by Anion Exchange[J]. Chinese Journal of Structural Chemistry,
;2014, 33(6): 903-908.
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Two macrocyclic zinc(Ⅱ) complexes {[ZnL(VO3)2]·0.33H2O}n (1) and [ZnL(H2O)2][Ni(CN)4] (2) (L=5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) have been obtained from the reactions of [ZnL](ClO4)2 with NH4VO3 and K2[Ni(CN)4], respectively, and structurally characterized by elemental analysis, IR, XRPD, TG and X-ray diffraction. Single-crystal X-ray diffraction analyses indicated that the Zn(Ⅱ) atom lies on an inversion center and is octahedrally coordinated by four nitrogen atoms of the tetradentate macrocyclic ligand in the equatorial plane and two oxygen atoms of [VO4] tetrahedra in the axial positions in 1, and two oxygen atoms of two water molecules in 2. Complex 1 shows a three-dimensional structure, which is constructed by the links of [VO3]nn- chains with [ZnL]2+, forming one-dimensional channels occupied by guest water molecules. The monomers of [ZnL(H2O)2]2+ and [Ni(CN)4]2- are connected through the intermolecular hydrogen bonds to form a two-dimensional sheet in complex 2.
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Keywords:
- macrocyclic zinc(Ⅱ) complexes,
- binuclear,
- vanadium,
- anion exchange
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