Journal of the Brazilian Chemical Society
versión impresa ISSN 0103-5053
VISENTIN, Lorenzo C.; FERREIRA, Leonardo C.; BORDINHAO, Jairo y FILGUEIRAS, Carlos A. L.. Synthesis, structural and spectroscopic studies of novel azo-containing N,O-bonded complexes in the α-Iminoketone and Azophenolate forms. J. Braz. Chem. Soc. [online]. 2010, vol.21, n.7, pp. 1187-1194. ISSN 0103-5053. http://dx.doi.org/10.1590/S0103-50532010000700005.
This article describes the synthesis and the spectroscopic and structural characterization of two novel azo-containing complexes, cis-bis[4-nitro-2-(4-nitrophenylazo)-phenolate-κN1]bis(piridino-κN)cadmium(II), 1, and cis-bis[2-(4-phenylazo-phenylimino)-2H-acenaphthylen-1-one]dichloromercury(II), 2. In spite of the different metal centres, both complexes show an N,O-bidentate complexation to the metal. In 1 the metal coordinates to an azo N and to a phenolate O atom, whereas in 2 the metal binds to an O and an N atom of the α-iminoketone. Both complexes show intramolecular π-π interactions, which play an important role in their molecular structures. In addition they also present non-classical H-bonding, which is crucial to their supramolecular arrangements. Moreover, 2 is the first case in the literature of a complex with a new class of ligand, an azoiminoketone, as well as the first case of an α-iminoketone Hg complex.
Palabras llave : α-iminoketone; azo-group; π-π interactions; non-classical H-bonds.