Synthesis and x-ray crystal structure of a 24-membered macrocyclic binuclear cadmium(ii) complex with pendant arms

A new binuclear cadmium(II) macrocyclic complex has been synthesized by [2 + 2] Schiff base condensation of tris(2-aminoethyl)amine (tren) with sodium 2, 6-diformyl-4-bromo-phenolate (sdbp) in the presence of Cd 2+ ion. The crystal structure of the complex [Cd 2 L](ClO 4 ) 2 0.5CH 3 OH has been dete...

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Bibliographic Details
Published in:Journal of coordination chemistry 1998-04, Vol.43 (4), p.281-288
Main Authors: Xu, Xin-You, Wang, Zhi-Lin, Luo, Qin-Hui, Shen, Meng-Chang, Zhou, Xiang-Ge, Zhou, Zhong-Yuan
Format: Article
Language:English
Subjects:
binuclear complex
cadmium
polyazamacrocycle
X-ray structure
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Summary:A new binuclear cadmium(II) macrocyclic complex has been synthesized by [2 + 2] Schiff base condensation of tris(2-aminoethyl)amine (tren) with sodium 2, 6-diformyl-4-bromo-phenolate (sdbp) in the presence of Cd 2+ ion. The crystal structure of the complex [Cd 2 L](ClO 4 ) 2 0.5CH 3 OH has been determined by X-ray methods. Crystals are mono-clinic, space group P2 1 /c with a = 11.633(15), b = 16.370(2), c = 21.193(2) Å, β = 96.121(12)°, Z= 4, V= 4013.0(8) Å 3 , F(000) = 2180, Dc., = 1.841 g cm −3 , μ = 32.46 cm −1 , R = 0.049, R w = 0.069. Two cadmium(II) ions are bridged by two μ 2 -phenoxy oxygen atoms. Each cadmium lies in a N 4 O 2 coordination environment. Coordination geometry around Cd(II) is a capped trigonal bipyramid. Coordination of phenoxy oxygens and terminal amino groups enhances the stability of the complex.
ISSN:0095-8972
1029-0389
DOI:10.1080/00958979808230441