caa a22 4500 463191889 CHVBK 20180406164911.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10973-005-7479-9 doi (NATIONALLICENCE)springer-10.1007/s10973-005-7479-9 Orotic acid complexes of Co(II), Ni(II), Zn(II) and Cd(II) with imidazole [Elektronische Daten] Syntheses, spectroscopic and thermal studies [O. Yeşilel, H. Ölmez, H. İçbudak] The [Co(HOr)(H2O)2(im)2] (1), [Ni(HOr)(H2O)2(im)2] (2), [Zn(H2O)2(im)4](H2Or)2 (3) and [Cd(HOr)(H2O)(im)3] (4) complexes (H3Or: orotic acid, im: imidazole) were synthesized and characterized by elemental analysis, magnetic and conductance measurements, UV-vis and IR spectra. The thermal behaviour of the complexes was also studied by simultaneous thermal analysis techniques (TG, DTG and DTA). The orotate ligand (HOr2−) coordinated to the Co(II), Ni(II) and Cd(II) ions are chelated to the deprotonated pyrimidine nitrogen (N(3)) and the carboxylate oxygen, while do not coordinate to the Zn(II) ion is present as a counter-ion (H2Or−). The first thermal decomposition process of all the complexes is endothermic deaquation. This stage is followed by partially (or completely) decomposition of the imidazole and orotate ligands. In the later stage, the remained organic residue exothermically burns. On the basis of the first DTGmax, the thermal stability of the complexes follows order: 2, 176°C>1, 162°C>4, 155°C>3, 117°C in static air atmosphere. The final decomposition products which identified by IR spectroscopy were the corresponding metal oxides. Springer Science+Business Media LLC, 2007 imidazole complexes nationallicence orotic acid complexes nationallicence thermal analysis nationallicence Yeşilel O. Department of Chemistry, Faculty of Arts and Sciences, Eskişehir Osmangazi University, 26480, Eskişehir, Turkey aut Ölmez H. Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayıs University, 55139, Kurupelit, Samsun, Turkey aut İçbudak H. Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayıs University, 55139, Kurupelit, Samsun, Turkey aut Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/2(2007-08-01), 555-559 1388-6150 89:2<555 2007 89 10973 https://doi.org/10.1007/s10973-005-7479-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-005-7479-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yeşilel O. Department of Chemistry, Faculty of Arts and Sciences, Eskişehir Osmangazi University, 26480, Eskişehir, Turkey aut NATIONALLICENCE 700 1- Ölmez H. Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayıs University, 55139, Kurupelit, Samsun, Turkey aut NATIONALLICENCE 700 1- İçbudak H. Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayıs University, 55139, Kurupelit, Samsun, Turkey aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/2(2007-08-01), 555-559 1388-6150 89:2<555 2007 89 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer