53 research outputs found
Distortion Isomerism of Cu(II) Chloride Adducts with Bis(2-benzimidazolyl)ethane. Synthesis, Characterization, X-ray Structures and Spectroscopy of Four Different Isomers
Metals in Catalysis, Biomimetics & Inorganic Material
A structural study of copper(II) carboxylates: Crystal structure and physical characterisation of [Cuâ(2-bromopropanoato)â(caffeine)â]
Based on the bond-valence sum model the continual transition between the bidentate and monodentate bonding mode of carboxylato group and minimum of CuâO bond lengths were estimated. The dependence of CuâŻCu separation on CuâN bond length in binuclear Cu(II) carboxylates with caffeine were derived and fitted to the observed data. The crystal structure of [Cuâ(2-bromopropanoato)â(caffeine)â] has been determined by X-ray crystallography. The structure consists of centrosymmetric binuclear units where the two Cu atoms are coordinated by four disordered bridging 2-bromopropionates and two caffeine ligands at the apices of a bicapped square prism. Both 2-bromopropionates show disorder of their âBr and âCHâ substituents. Stacking ÏÂ·Ï interactions between the adjacent caffeine molecules link the complex units in 1-D networks. The binuclear structure of the studied compound is consistent with magnetic data and EPR spectrum
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