98603-71-5Relevant articles and documents
Comparmental ligands. Part 11. Copper(II) complexes of 'half-unit' Schiff bases: crystal and molecular structures of the monomeric and of one dimeric complex
Bailey, Neil A.,Fenton, David E.,Tate, John R.,Thomas, Peter M.
, p. 1471 - 1478 (2007/10/02)
The synthesis of 'half-unit' Schiff bases derived from 1-(2'-hydroxyphenyl)butane-1,3-dione (Hhpbdo) and α,ω-alkanediamines are reported, together with that of the related compound derived from Hhpbdo and 2-(2'-aminoethyl)pyridine.The copper(II) complexes of these are reported and threedimensional X-ray crystal structure analyses were cariied out for acetatocopper(II), 5)(O2CMe)>, and acetatocopper(II), 1)(O2CMe)>.The crystal structure of 5)(O2CMe)> is triclinic, R = 0.0332, for 2529 reflections.The copper(II) atom is five-co-ordinate, with the nitrogen atoms, ketonic oxygen of the ligand, and one acetate oxygen providing a tetrahedrally distorted (15 deg) square plane, with a further acetate oxygen at 2.55 Aengstroem.The structure of 1)(O2CMe)> (R = 0.0476, 1550 reflections) shows an acetate-bridged, dinuclear dimer in which there is a copper-copper distance of 3.51 Angstroem.The coordinating atoms comprise four short interactions (ketonic oxygen, imino-nitrogen, primary amine nitrogen, and acetate oxygen) with two longer interactions, one towards the bridging acetate oxygen, and the other to the second oxygen of the acetate anion which is the more strongly bound to the copper(II).The application of the 'half-units' to the synthesis of unsymmetrical Schiff bases and the metal complexation properties of these bases are discussed briefly.
