Synthesis, crystal structure and charge transfer spectra of dinuclear copper(I) complexes bearing 1,2-bis(arylimino)acenaphthene acceptor ligands

► Dinuclear halide bridged copper(I) complexes carrying substituted bis(imino)acenaphthene (BIAN) ligands are prepared. ► Crystal structures and electronic spectra are presented. ► Charge transfer transitions and solvatochromic behavior are discussed.