Self-assembly hydrogen-bonded supramolecular arrays from copper(II) halogenobenzoates with nicotinamide: Structure and EPR spectra |
| |
| Authors: | Jozef Halaška Danica Čechová Michael K Lawson Zdeňka Růžičková Vladimír Jorík Marian Koman Marian Valko Bojan Kozlevčar Ján Moncol |
| |
| Institution: | 1.Faculty of Chemical and Food Technology,Slovak University of Technology,Bratislava,Slovakia;2.Department of General and Inorganic Chemistry, Faculty of Chemical Technology,University of Pardubice,Pardubice,Czech Republic;3.Faculty of Chemistry and Chemical Technology,University of Ljubljana,Ljubljana,Slovenia |
| |
| Abstract: | Nicotinamide was employed as a supramolecular reagent in the synthesis of six new copper(II) bromo-, iodo-, fluoro- and dibromobenzoate complexes. Structures of Cu(2-Brbz)2(nia)2(H2O)2] (I), Cu(2-Ibz)2(nia)2(H2O)2] (II), Cu(2-Fbz)2(nia)2(H2O)2] (III), Cu(4-Brbz)2(nia)2(H2O)2] (IV), Cu(3,5-Br2bz)2(nia)2(H2O)2] (V), Cu(F-Fbz)2(nia)2(H2O)] · H2O (VI) (nia = nicotinamide, 2-Brbz = 2-bromobenzoate, 4-Brbz = 4-bromobenzoate, 3,5-Br2bz = 3,5-dibromobenzoate, 2-Ibz = 2-iodobenzoate, 2-Fbz = 2-fluorobenzoate, 4-Fbz = 4-fluorobenzoate) were determined using X-ray analysis. Compound Cu(2-Brbz)2(nia)2] · 2H2O (VII) was prepared by a new method and also characterized by X-ray powder diffraction and EPR spectroscopy. Compounds I–V are monomeric complexes with a square-bipyramidal coordination sphere around the Cu2+ ion. Complex VI is monomeric with coordination environment around the Cu2+ ion of a tetragonal-pyramid. Complexes I and VII present examples of coordination isomerism. Molecules of all compounds are connected by N—H?O and O—H?O hydrogen bonds from the NH2 groups of nicotinamide and water molecules which create supramolecular hydrogen-bonding-coordination chains and networks. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
