Last modified: 2018-07-25
Abstract
Azo compounds are very important in the fields of dyes, pigments and advanced materials. Azo dyes are synthetic colours that contain an azo group, as part of the structure. They are characterized by the azo linkage (-N=N-). We are involved in the color generation mechanism of azo pigments typically characterized by the chromophore of the azo group to synthesize new copper complex with Cu(OAc)2.H2O. Metal complexes with azo ligands show interesting chemical and physical properties and are of interest as new materials, for example in bioinorganic and coordination chemistry, as well as in biological systems which can lead to the development of new products with specific properties. In this work the structure of the title molecule, Cu2(C17H13N2O2)4, is reported.
The dinuclear CuII complex consists of two inversion related asymmetric units, in which the CuII atoms are each coordinated by two N,O-bidentate phenylazo-naphtholate ligands. The two N atoms and two O atoms around the Cu atom are trans to each other with an O2"Cu"N1 bond angle of 86.83 (7) and O2"Cu"N3 angle of 96.06 (7). The inversion related asymmetric units are linked by one bridging O atom [O2i; symmetry code: (i) −x + 1, −y, −z + 2] with O2i"Cu"O4 and O2"Cu"O2i angles of 104.51 (6) and 81.69 (5), respectively, to form a distorted square pyramidal geometry. In the crystal, molecules are linked via weak C"H....O hydrogen bonds forming a layer.
References
[1] Carella, A., Casalboni, M., Centore, R., Fusco, S., Noce, C., Quatela, A., Peluso, A. & Sirigu, A. (2007). Opt. Mater. 30, 473477.
[2] Kulikovska, O., Goldenberg, L. M. & Stumpe, J. (2007). Chem. Mater. 19, 33433348.
[3] Patnaik, S., Sharma, A. K., Garg, B. S., Gandhi, R. P. & Gupta, K. C. (2007). Int. J. Pharm. 342, 184193.