The Crystal Structure of Bis[<i>N</i>-(2,6-diisopropylphenyl)imino] Acenaphthene and Studies of its Copper(I) and Copper(II) Complexes

Abstract

The crystal structure of the rigid bidentate nitrogen ligand bis[N-(2,6-diisopropylphenyl)imino]acenaphtene (o, o'-iPr2C6H3-BIAN) is described. Syntheses, electronic spectra and electrochemical properties of two copper complexes containing (o,o'-iPr2C6H3-BIAN), namely, [CuCl(o,o'-iPr2C6H3-BIAN)2]Cl (1) and [Cu(o,o'-iPr2C6H3-BIAN)2](CIO4)(AcOH)2 (2), where AcOH=acetic acid, are reported. Although in both complexes two o,o'-iPr2C6H3-BIAN ligands are coordinated, geometries about the copper atom are significantly different. While complex 2 displays a strongly "flattened" distortion towards square-planar geometry, in complex 1 square-pyramidal coordination with an almost perfect planar arrangement of two o,o'-iPr2C6H3-BIAN ligands around the copper centre is suggested.