Synthesis, structural and spectroscopic studies of novel azo-containing N,O-bonded complexes in the α-Iminoketone and Azophenolate forms

Journal of the Brazilian Chemical Society

Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil¹  Ferreira, Leonardo C.¹  Filgueiras, Carlos A. L.¹  Visentin, Lorenzo C.¹  Bordinhão, Jairo¹ 

关键词: α-iminoketone;    azo-group;    π-π interactions;    non-classical H-bonds;   

DOI  :  10.1590/S0103-50532010000700005

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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.

【 授权许可】

Unknown