| Abstract: | Several new copper(I) complexes of a group of bidentate bithiazole ligands have been isolated. The compounds prepared are bis(2,2′-dimethyl-4,4′-bithiazole)copper(I) perchlorate (Cu(me-b)2]ClO4), bis(4,4′-dimethyl-2,2′-bithiazole)copper(I) perchlorate (Cu(me-i)2]ClO4), bis(2,2′-diphenyl-4,4′-bithiazole) copper(I) perchlorate (Cu(ph-b)2]ClO4), bis(4,4′-diphenyl-2,2′-bithiazole)copper(I) perchlorate (Cu(ph-i)2]ClO4), bis(4,4′,5,5′-tetraphenyl-2,2′-bithiazole)-copper(I) perchlorate (Cu(ph4-i)2]ClO4, bis(2,2′-bithiazole)copper(l) perchlorate (Cu(i)2]CIO4), 2,2′-bithiazolecopper(I) perchlorate (Cu(i)ClO4), (2,2′-bithiazole)bis(triphenylphosphinesulfide)copper(I) perchlorate (Cu(i)(SPph3)2]ClO4,(2,2′-bithiazole)bis-( triphenylphosphine)copper(I) perchlorate (Cu(i)(Pph3)2]ClO4), and (4,4′-bithiazole)bis(triphenylphosphine) copper(I) perchlorate (Cu(b)(Pph3)2]ClO4). Several synthetic techniques were required including one developed in this work which involved the conversion of Cu(Pph3)4]ClO4 into the thiophosphine complex by reaction with sulfur and subsequent use of this as a labile precursor complex. Optical spectra of the complexes indicate extensive solution dissociation. Several of the complexes (Cu(ph-b)2]ClO4, Cu(ph-i)2]CIO4, and Cu(i)(Pph3]ClO4) were photoluminescent in the solid; one (Cu(ph-b)2]ClO4) showed extensive loss of emission during irradiation. Most of the complexes prepared here appear to bind through the thiazole nitrogen atoms. However, infrared evidence suggests that in two of the complexes thiazole sulfur atoms participate in the bonding. |
