Synthesis and crystal structure of a bicadmium(II) cryptate derived from condensation of 2-aminoethyl-bi(3-aminopropyl)amine with sodium 2,6-diformyl-4-methylphenolate

Abstract

[Cd₂L](ClO₄)(CH₃OH), the first bicadmium(II) cryptate derived from weak nucleophilic addition to [Cd₂L′], which was synthesized by [2+3] Schiff-base condensation of 2-aminoethyl-bi(3-aminopropyl)amine (ppe) with sodium 2,6-diformyl-4-methylphenolate (sdmp) in the presence of Cd(ClO₄)₂·6H₂O, has been synthesized and characterized by single-crystal X-ray diffraction. The complex crystallizes in the triclinic system, space group P

with a = 11.8143(3), b = 13.6117(4), c = 15.9894(4) Å, α = 103.10, β = 91.6600(10), γ = 104.1770(10)°, V = 2418.40 (11) ų, F(000) = 1144, D _calc = 1.536 g cm⁻³, Z = 2, R = 0.0749, wR = 0.1846. Cd(1) is in an N4O2 coordination environment and forms a distorted tetragonal bipyramid; Cd(2) lies in an N4O3 coordination environment and possesses a monocapped-octahedral geometry.

Keywords:

• Bicadmium(II) cryptate
• Hydrolysis
• Crystal structure

Acknowledgments

This project was supported by the Foundation of Science Committee of Jiangsu Province and the State Key Laboratory of Coordination Chemistry of Nanjing University.

Supplementary data

Crystallographic data for the structures in this article have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication CCDC No. 223715 for complex [Cd₂L]. Copies of the data can be obtained free from The Director, CCDC, 12 Union Road, Cambridge CB2 1EZ, UK (fax: [phone]; e-mail: [email protected] or http://www.ccdc.cam.ac.uk).