Self-assembly of zinc(II) tetraaza macrocyclic complex and 1,3,5-cyclohexanetricarboxylic acid

• Main Authors: Lim In-Taek, Choi Ki-Young
• Format: Article
• Language: English
• Published: De Gruyter 2015-03-01
• Series: Main Group Metal Chemistry
• Subjects: crystal structure; 1,3,5-cyclohexanetricarboxylic acid; 3d hydrogen-bonded polymer; tetraaza macrocycle; zinc(ii) complex
• Online Access: https://doi.org/10.1515/mgmc-2014-0043

The self-assembly of [Zn(L)(H2O)2]·Cl2 and sodium 1,3,5-cyclohexanetricarboxylate yields a 3D hydrogen-bonded polymer [Zn(L)(H2chtc-)]H2chtc-·H2O (1) (L=3,14-dimethyl-2,6,13,17-tetraazatricyclo[14,4,01.18,07.12]docosane, H3chtc=1,3,5-cyclohexanetricarboxylic acid). Complex 1 is characterized by X-ray crystallography, spectroscopy and thermogravimetric analyzer. The coordination geometry around the zinc(II) atom is a distorted square-pyramidal with four nitrogen atoms of the macrocycle occupying the basal sites and one carboxylate oxygen atom of the H2chtc- ligand at the apical position. The compound crystallizes in the monoclinic system p21/c with a=8.5287(8), b=39.241(3), c=12.6135(11) Å, β (°)= 104.525(6)°, V=4086.5(6) Å3, Z=4. The IR spectrum and the TGA behavior of the complex are significantly affected by the 1,3,5-cyclohexanetricarboxylic acid.