3D hydrogen-bonded network built from copper(II) complexes of 1,3-propanediamine

• Autor(a) principal: Legendre, Alexandre O. [UNESP]
• Data de Publicação: 2006
• Outros Autores: Andrade, Fabiana C. [UNESP], Ananias, Sandra R. [UNESP], Mauro, Antonio Eduardo [UNESP], Netto, Adelino Vieira de Godoy [UNESP], Santos, Regina H. A., Ferreira, Janaina G., Martins, Fabiane R.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0103-50532006000800029; http://hdl.handle.net/11449/35164
• topic: copper(II) complexes; hydrogen bonds; supramolecular chemistry

The reaction of Cu(NO3)(2).3H(2)O with 1,3-propanediamine (pn), in the presence of NaN3, afforded a 1:1 co-crystal formed by [Cu(NO3)(2)(pn)(2)] and [Cu(N-3)(NO3)(pn)(2)] (1 and 2), which were characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction. In both compounds, the copper(II) centers are in a distorted octahedral environment, formed by four N atoms of two bidentate pn ligands in the basal plane, whereas the axial bonds are formed by two O atoms from the nitrate ligands in 1 and one O atom from the nitrate ligand and one N atom from the azide ion in 2. The asymmetric unit of the crystal consists of two crystallographically independent 1 and 2 complexes, which are held together in a 3D network by a series of N - H center dot center dot center dot O and N - H center dot center dot center dot N hydrogen bonds, as well C - H center dot center dot center dot O interactions. New supramolecular synthons are identified by the occurrence of two geometrically distinct molecular recognition patterns involving the NO3- ion and amino groups from pn ligands.