Synthesis and Crystal Structures of a Pair of Isostructural Azido-Bridged Polynuclear Schiff Base Zinc(II) Complexes |
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| Authors: | Heng-Yu Qian and Zhong-Lu You |
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| Institution: | (1) Key Laboratory of Surface and Interface Science of Henan, School of Material & Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, People’s Republic of China;(2) Department of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, People’s Republic of China |
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| Abstract: | Abstract A pair of novel isostructural azido-bridged polynuclear zinc(II) complexes, Zn2(L1)2(μ1,1-N3)(μ1,3-N3)]
n
(1) and Zn2(L2)2(μ1,1-N3)(μ1,3-N3)]
n
(2) (HL1 = 2-bromo-4-chloro-6-(2-isopropylaminoethylimino)methyl]phenol, HL2 = 2,4-dibromo-6-(2-isopropylaminoethylimino)methyl]phenol),
have been synthesized and structurally characterized by elemental analysis, IR spectra and single crystal X-ray diffraction.
Both complexes crystallize in the orthorhombic space group Pcca. Crystal data for (1): a = 22.567(4) ?, b = 8.414(2) ?, c = 17.268(3) ?, V = 3279.0(11) ?3, Z = 8, R
1 = 0.0441, and wR
2 = 0.0846. Crystal data for (2): a = 22.536(4) ?, b = 8.409(2) ?, c = 17.531(3) ?, V = 3322.2(11) ?3, Z = 8, R
1 = 0.0538, and wR
2 = 0.0906. X-ray structure determination revealed that each zinc(II) atom in the complexes is in a trigonal–bipyramidal coordination,
with one imine N atom of a Schiff base ligand and two N atoms from two bridging azide ligands defining the basal plane, and
one phenolate O and one amine N atoms of the Schiff base ligand occupying the two axial positions. |
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