Synthesis,spectral and magnetic properties of two different 2-nitrobenzoatocopper(II) complexes containing N,N-diethylnicotinamide |
| |
Authors: | J Kavalírová M Korabik P Stachová J Moncol R Sillanpää T Lis D Mikloš M Melník J Mroziński D Valigura |
| |
Institution: | 1. Department of Inorganic Chemistry, Slovak Technical University, Radlinského 9, 812 37 Bratislava, Slovakia;2. Faculty of Chemistry, University of Wroclaw, 50-383 Wroclaw, Poland;3. Department of Chemistry, University of Jyväskylä, 40351 Jyväskylä, Finland |
| |
Abstract: | Two structurally different complexes, Cu2(2-NO2Bz)4(denia)1]n (1) and Cu(2-NO2Bz)2(denia)2(H2O)2] (2), were prepared from the same reaction (where 2-NO2Bz = 2-nitrobenzoate, denia = N,N-diethylnicotinamide) and they are reported together with Cu2(2-NO2Bz)4(DMF)2] (3) (DMF = N,N-dimethylformamide). The compounds under study were characterized by elemental analysis, electronic, IR and EPR spectra, magnetic measurements over the temperature range of 1.8–300 K and X-ray analysis. The molecular structure of (1) is polymeric, (2) is monomeric and (3) is dimeric. In the polymeric chain of (1), the denia molecules serve as bridges between dimeric Cu2(2-NO2bz)4 units. Each Cu(II) atom has a square-pyramidal arrangement with different chromophores, Cu1O4O′ and Cu2O4N. The Cu–Cu distances are 2.699(1) Å in the dimeric unit and 7.980(3) Å between the dimeric units. In (2) the Cu(II) atom has a tetragonal-bipyramidal environment CuO2N2O′2. In (3) two Cu(II) atoms are bridged by four carboxylate groups of four 2-NO2bz anions in a syn–syn arrangement which create a square base about each Cu(II) atom and an apical position is occupied by the O atom of a DMF molecule (CuO4O′). The Cu–Cu distance of 2.633(1) Å is somewhat shorter than in (1). Spectral and magnetic data of the complexes are discussed with their structures. |
| |
Keywords: | Copper(II) Carboxylate 2-Nitrobenzoate Crystal structure Spectra Magnetism |
本文献已被 ScienceDirect 等数据库收录! |
|