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Articles by Halit Kantekin
Total Records ( 3 ) for Halit Kantekin
  Meltem B. Kılıcaslan , Fatma Agın and Halit Kantekin
  Dinitrile monomer (3) was synthesized by nucleophilic aromatic substitution of 4-phenoxyphenol (1) with 4-nitrophthalonitrile (2). The metal-free phthalocyanine (4) was prepared by the reaction of dinitrile monomer (3) with DMAE. Ni(II), Co(II), and Zn(II) metallophthalocyanines were prepared by the reaction of 3 with chlorides of Ni(II), Co(II), and Zn(II) in DMAE. The new compounds were characterized by IR, 1H- and 13C-NMR, UV-Vis, elemental analysis, and MS specral data.
  Gulsev Dilber , Halit Kantekin , Nurettin Yayli and Riza Abbasoglu
  In this study, 19-nitro-6,7,15,16,23,24-hexahydro-13H,26H-14,25-propanotribenzo-[b,i,o] [1,4,11,14,7,18] tetraoxadiazacycloicosine (3) was synthesized using 6,7,8,9,10,11,17,18-octahydro-5H-dibenzo[e,n][1,4]dioxa[8,12]diazacyclopentadesine (1) and 4-nitro-1,2-bis(2-iodoethoxy)benzene (2) as the starting compounds. Macrobicyclic amine 4 was synthesized by reaction of an aromatic nitro compound with hydrazine hydrate (100%) and palladium (10%)-activated carbon in n-butanol. N1,N2-di-6,7,15,16,23,24-hexahydro-13H,26H-14,25-propanotribenzo[b,i,o][1,4,11,14,7,18]tetraoxadiazacycloicosin-19-yl-N’1,N’2-dihydroxyethane-diimidamide vic-dioxime (6) was synthesized by reaction of cyanogen-di-N-oxide in CH2Cl2, which was obtained from (E, E)-dichloroglyoxime and an aqueous solution of Na2CO3 (0.1 N) with 4. Mononuclear Ni(II), Co(III), and Cu(II) complexes, 7, 9, and 10, were synthesized by reaction of vic-dioxime with NiCl2·6H2O, CoCl2·6H2O, and CuCl2·2H2O, respectively. −Capped mononuclear Ni(II) complex 8 was synthesized by reaction of boron-trifluoride diethyl etherate with mononuclear nickel(II) complex 7 in acetonitrile. The structures of new compounds were determined by elemental analysis, 1H-NMR, 13C-NMR, IR, mass spectroscopic data, and thermal methods (TG/DTA). The conformational analysis of the ligands was performed using DFT and AM1 methods.
  Zekeriya Bıyıklıoglu , Atif Koca and Halit Kantekin
  Novel Ni(II), Zn(II), Co(II) and Cu(II) phthalocyanines with four peripheral 4-[methyleneoxy(18-crown-6)] groups have been synthesized via the cyclic tetramerization of 4-[{(18-crown-6)-yl}methyleneoxy]phthalonitrile and the corresponding metal salts (NiCl2, Zn(CH3COO)2, CoCl2 and CuCl2). The thermal stabilities of the metal-free and metallophthalocyanine compounds were determined by thermogravimetric analysis. The structures of the target compounds were confirmed using elemental analysis, IR, 1H-NMR, 13C-NMR, UV–Vis and MS spectral data. Voltammetric and in situ spectroelectrochemical measurements show that while the cobalt phthalocyanine complex gives both metal-based and ring-based redox processes, the metal-free, nickel, zinc and copper phthalocyanines show only ring-based reduction and oxidation processes. An in situ electrocolorimetric method has been applied to investigate the color of the electro-generated anionic and cationic forms of the complexes.
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