G. Y. S. K. Swamy, K. Ravikumar, K. Chandramohan, N.V. Lakshmi: The Crystal and Molecular Structure of (µ-terephthlato) bis [(N-Salicylidene -N’-(2-hydroxyethyl) ethylenediamine) Copper(II)]

Crystal Research and Technology

Cryst. Res. Technol. 36 (2001) 1273 - Abstract -

G. Y. S. K. Swamy, K. Ravikumar, K. Chandramohan, N.V. Lakshmi

Laboratory of Crystallography, Indian Institute of Chemical Technology, Hyderabad, India

The Crystal and Molecular Structure of (µ-terephthlato) bis [(N-Salicylidene -N’-(2-hydroxyethyl) ethylenediamine) Copper(II)]

The title compound [[Cu(shen)]₂(tp)], {[Cu(C₁₅H₁₇O₄N₂)]₂}, where tp = dianion of terephthalic acid and shen = (N salicylidene N' (2 hydroxyethyl ethylene-diamine)) has been prepared and its crystal structure determined by single crystal X ray diffraction at room temperature. The complex crystallizes in the orthorhombic space group Pbca with four formula units in a unit cell of dimensions a=12.298(2), b=14.214(2) and c=16.436(2)Å. The structure consists of binuclear units with Cu(II) ion bridged by the tp ligand in a bis unidentate fashion. The five coordinate Cu(II) complex adopts a distorted square based pyramid. A crystallographic inversion center has been located at the center of the benzene ring of the tp bridging ligand. The Cu...Cu distance inside a same binuclear entity is 11.069Å. Intermolecular aromatic ring stacking interactions were observed with the shortest atom to atom contact being 3.423Å.

Keywords: crystal structure, X ray diffraction, molecular bridging, schiff base, stacking interactions, copper(II) complex

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