@article{Rodić_Miškov-Pajić_Leovac_Radanović_Vojinović-Ješić_Belošević_Jaćimović_Živković-Radovanović_2020, place={Belgrade, Serbia}, title={First cobalt complexes with methyl pyruvate semi/thiosemicarbazone – Synthesis, physicochemical and structural characterization}, volume={85}, url={https://www.shd-pub.org.rs/index.php/JSCS/article/view/8309}, DOI={10.2298/JSC191219010R}, abstractNote={<p class="Abstract">In the reaction of acetone solutions of CoX2∙<em>n</em>H2O (X = Cl, Br) with methyl pyruvate semi/thiosemicarbazone (Hmps, Hmpt) the first Co(II) com­plexes with these ligands, <em>i.e.</em>, [Co(Hmps)(H2O)X2] (X = Cl (<strong>1</strong>), Br (<strong>2</strong>)), [Co(Hmpt)2][CoCl4]∙2H2О (<strong>3</strong>) and [Co(Hmpt)2]Br2∙Me2CO (<strong>4</strong>) were obtained. Complexes <strong>1</strong> and <strong>2</strong> represent the first examples of metal complexes of Hmps. All the obtained compounds were characterized by elemental analysis, conduc­to­metry, magnetic measurements, and IR spectra, and for complexes <strong>2</strong>–<strong>4</strong>, single crystal X-ray diffraction analysis was also performed. The effective magnetic moments were close to the upper limit (5 <em>μ</em>B) for complexes <strong>1</strong> and <strong>2</strong>,<strong> </strong>and close to the lower limit<strong> </strong>(4.4 <em>μ</em>B) for complexes <strong>3 </strong>and <strong>4</strong>,<strong> </strong>and as such are characteristic for high-spin Co(II) complexes. Structural analysis showed that both ligands coordinate in a neutral form in a tridentate manner, <em>via</em> the ester oxygen, imine nitrogen and the oxygen atom of the ureido (Hmps), or the sul­fur atom of the thioureido group (Hmpt). The central metal atoms are situated in a deformed octahedral coordination environment. Complex <strong>2</strong> has <em>cis</em>-Br con­figuration, while complexes <strong>3</strong> and <strong>4</strong><em> </em>have <em>mer</em>-configuration.</p>}, number={4}, journal={Journal of the Serbian Chemical Society}, author={Rodić, Marko V. and Miškov-Pajić, Vukoslava and Leovac, Vukadin M. and Radanović, Mirjana M. and Vojinović-Ješić, Ljiljana S. and Belošević, Svetlana K. and Jaćimović, Željko K. and Živković-Radovanović, Vukosava}, year={2020}, month={Apr.}, pages={453–466} }