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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 62, Number 1
JKCSEZ 62(1)
February 20, 2018 

 
Title
Synthesis and Characterization of Zinc(II) Tetraaza Macrocyclic Complexes with Aquo and Nitrate Ligands
Author
In Taek Lim, Chong Hyeak Kim, Yoon Mi Choi, Jong Hoon Park, Ki Young Choi*
Keywords
Zinc(II) complexes, Tetraaza macrocycle, Aquo ligand, Nitrite ligand, Nitrate ligand
Abstract
The complexes [Zn(L)(H2O)2]⋅2NO2 (1) and [Zn(L)(NO3)2] (2) (L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo [14,4,01.18,07.12]docosane) have been synthesized and structurally characterized. The compound 1 crystallizes in the monoclinic system P21/c with a = 8.74650(10), b = 18.6880(3), c = 7.96680(10) Å, β = 109.1920(10)°, V = 1229.84(3) Å3, Z = 2. The compound 2 crystallizes in the monoclinic system P1 with a = 8.1292(5), b = 8.9244(5), c = 9.1398(5) Å, α = 68.035(2), β = 70.109(2), γ = 75.649(3)°, V = 572.70(6) Å3, Z = 1. The crystal structures of the compounds 1 and 2 show a distorted octahedral coordination geometry around the zinc(II) ion, with four secondary amines and two oxygen atoms of the two water and two nitrate ligands at the axial position. The TGA behaviors of the complexes are significantly affected by the nature of the tetraaza macrocycle and the axial ligands.
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14 - 18
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