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    Conversion of CO2 into cyclic carbonates in the presence of metal complexes as catalysts
    (Science Reviews 2000 Ltd, 2010) Kilic, Ahmet; Durgun, Mustafa; Ulusoy, Mahmut; Tas, Esref
    The sterically hindered salicylaldimine ligands N,N'-(1,5-diaminonaphthalene)-3,5-bu(2)(t)-salicylaldimine (L-1), N,N'-(2,7-diaminofluaren)-3,5-bu(2)(t)-salicylaldimine (L-2) and N,N'-(1,8-diaminonaphthaline)-3,5-bu(2)(t)-salicylaldimine (L-3) have been synthesised by the condensation of 1,5-diaminonaphthalene, 2,7-diaminofluarene, and 1,8-diaminonaphthaline with 3,5-di-tert-butylsalicylaldehyde, respectively. Dinuclear M(II) complexes of L-1 and L-2 and mononuclear M(II) complexes of L-3 have been prepared using Cu(II), Ni(II), Co(II), and Mn(II) salts and characterised. The synthesised sterically-hindered, salen-type complexes were tested as catalysts for the formation of cyclic carbonates from CO2 and liquid epoxides (propylene oxide, epichlorohydrine, 1,2-epoxybutane and styrene oxide), which served as both reactant and solvent. Ligand structure and the type of metal centre have a marked influence on the catalytic activity. Mn(II) complexes showed the highest catalytic activity.
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    Öğe
    Crystal and molecular structure of N-[1-(3-aminopropyl)imidazole]-3,5-di-t- butylsalicylaldimine
    (Japan Society for Analytical Chemistry, 2009) Çelik, Ömer; Taí, Eşref; Ide, Semra; Ulusoy, Mahmut
    A new compound N-[1-(3-aminopropyl)imidazole]-3,5-di-tert-butylsalicylaldimine (C21H31N3O) has been obtained from the reaction of 5 mmol 3,5-DTB in 20 ml absolute ethanol and 5 mmol 1-(3-aminopropyl)imidazole in 10 ml ethanol, with the addition of 3 - 4 drop of acetic acid. The crystal and molecular structure of the title compound has been determined by the X-ray diffraction method. It crystallizes in the monoclinic system, space group P21/n with lattice parameters a = 9.2609(8)Å, b = 22.665(2)Å, c = 10.0975(8)Å, b = 100.400(7) and Z = 4. 2009 © The Japan Society for Analytical Chemistry.
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    Öğe
    Syntesis, Crystallographic Structure and Semiempirical Studies of a Novel Complexes of Uranyl(VII).
    (Int Union Crystallography, 2009) Tek, Ahmed Arif; Celik, Omer; Ulusoy, Mahmut; Iskeleli, Nazan Ocak; Eroglu, Erol; Tas, Esref
    [Abstract Not Available]