research papers
A new CuII-azide complex has been synthesized by the reaction of piperazine, Cu(OAc)2·2H2O (OAc is acetate) and NaN3. In the structure, 2-1,1- and 3-1,1,1-azide anions bridge five CuII cations to form a linear pentanuclear cluster unit, which is further linked by 2-1,1- and 2-1,3-azide anions to form a two-dimensional condensed [Cu5(N3)12]n layer.
metal-organic compounds
The four Co atoms of a novel tetranuclear mixed-valence cobalt complex display distorted octahedral coordination environments and are bridged by two 2-[(oxidoimino)methyl]-6-methoxyphenolate ligands, two 2-[(hydroxyimino)methyl]-6-methoxyphenolate ligands and two azide anions to form a tetranuclear [Co4N4O4] cluster. Adjacent clusters are connected through weak C-HN and C-HO interactions.