285116-51-0Relevant academic research and scientific papers
Copper(n) complexes of hydroquinone-containing Schiff bases. towards a structural model for copper amine oxidases
Li, Peiyi,Solanki, Nayan K.,Ehrcnbcrg, Helmut,Feeder, Neil,Davies, John E.,Rawson, Jeremy M.,Halcrow, Malcolm A.
, p. 1559 - 1565 (2000)
Complexation of the preformed ligand 2,5-dihydroxy-Ar-{pyridin-2-ylmethyl}-benzylideneamine (HL1) with hydrated Cu(BF42) afforded [{Cu(u-L')}2][BF4]j 1. The crystal structure of l-MeNO2 shows a dimer of near-planar copper(n) ions, with a bridging apical BF4- anion. Variable temperature susceptibility measurements showed the copper(n) ions in 1 to be moderately antiferromagnetically coupled. The complexes [CuL2]X (X- = C1O4 2, NO3 3, CP 4 or NCS5) and [CuL3]ClO4 (6; HL2 = A-{pyridin-2-ylmethyl}-A f'-{2,5-dihydroxybenzylidene}-l,2-diaminoethane, HL3 = A{pyridin-2-ylmethyl}-Ar'-{2,4,5-trihydroxybenzylidene}-l,2-diaminoethane) have been prepared by template condensation of Apyridin-ylmethylH--diaminoethane with the appropriate benzaldehyde derivative and copper salt. The single crystal structure of 2 shows a near-planar four-co-ordinate copper(n) centre, with a non-co-ordinated C1O4- anion. The chelate ligand backbone is disordered over two orientations, which correspond to different patterns of intermolecular hydrogen bonding in the lattice. UV/vis and EPR data in dmf solution suggest that 2-6 all undergo solvolysis to form an identical [CuL(dmf)Jt (x = 0-2) species in solution. Cyclic voltammograms of HL1 and 1-6 are complex, and demonstrate rapid acid-catalysed decomposition of the benzoquinonecarbaldimine ligand oxidation products. The Royal Society of Chemistry 2000.
