title: The coupling of carbon dioxide and epoxides by phenanthroline derivatives containing different Cu(II) complexes as catalyst.
abstract: A series of the mononuclear Cu(II) metal complexes containing the ligand Bdppz [(9a,13a-dihydro-4,5,9,14-tetraaza-benzo[b]triphenylene-11-yl)-phenyl-methanone] (L1) and Aqphen [(12,17-dihydronaphthol[2,3-h]dipyrido[3,2-a:2',3'-c]-phenazine-12,17-dione)] (L2) were synthesized and used as catalyst for the coupling of carbon dioxide (CO2) and liquid epoxide which served as both reactant and solvent. Dimethylamino pyridine (DMAP) was used as co-catalyst. The yields of epoxides to corresponding cyclic carbonates were determined by comparing the ratio of product to substrate in the (1)H NMR spectrum of an aliquot of the reaction mixture. The mononuclear Cu(II) complexes of these ligands were synthesized by treating an ethanol solvent of the appropriate ligand with a different molar amount of CuCl2·2H2O. The Cu(II) complexes were characterized by FT-IR, UV-Vis, elemental analysis, melting point analysis, mass spectra, molar conductivity measurements and magnetic susceptibility techniques. The reaction of the Bdppz and Aqphen ligands in a 1:1, 1:2 or 1:3 mole ratio with CuCl2·2H2O afforded ionic Cu(II) complexes in the presence of Et3N.
authors.affiliation: Department of Chemistry, University of Harran, 63190 Osmanbey Campus, Sanliurfa, Turkey. kilica63@harran.edu.tr
authors.forename: Ahmet
authors.initials: A
authors.lastname: Kilic
authors.forename: Ahmet Arif
authors.initials: AA
authors.lastname: Palali
authors.forename: Mustafa
authors.initials: M
authors.lastname: Durgun
authors.forename: Zeynep
authors.initials: Z
authors.lastname: Tasci
authors.forename: Mahmut
authors.initials: M
authors.lastname: Ulusoy
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D004852:Epoxy Compounds / Q000737:chemistry*; D008024:Ligands; D010618:Phenanthrolines / Q000138:chemical synthesis* / Q000737:chemistry; D011312:Pressure; D020058:Styrene / Q000737:chemistry; D013696:Temperature; D013997:Time Factors
chemical_list: D056831:Coordination Complexes; D004852:Epoxy Compounds; D008024:Ligands; D010618:Phenanthrolines; D002245:Carbon Dioxide; D020058:Styrene; D003300:Copper
keywords: Carbon dioxide; Cu(II) complexes; Cyclic carbonate; Mass spectra; Spectroscopy