scholarly journals Transition metal complexes with thiosemicarbazide-based ligands, Part 58. Synthesis, spectral and structural characterization of dioxovanadium(V) complexes with salicylaldehyde thiosemicarbazone

2011 ◽  
Vol 76 (6) ◽  
pp. 865-877 ◽  
Author(s):  
Ljiljana Vojinovic-Jesic ◽  
Vukadin Leovac ◽  
Mirjana Lalovic ◽  
Valerija Cesljevic ◽  
Ljiljana Jovanovic ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Structural Characterization ◽  
Ammoniacal Solution ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Oxo Ligand

The first two complexes of dioxovanadium(V) with salicylaldehyde thiosemicarbazone (SALTSC), of the coordination formulas [VO2(SALTSC-H)]?H2O (1) and NH4[VO2(SALTSC-2H] (2), were synthesized and characterized by elemental analysis, conductometric measurements, IR and UV-vis spectroscopy and X-ray analysis. The complexes were obtained in the reaction of an aqueous ammoniacal solution of NH4VO3 and SALTSC. The results of the characterization showed that SALTSC was coordinated in the usual ONS tridentate mode as monoanion in complex 1 and dianion in complex 2. In both complexes, the vanadium atom is in a deformed square-pyramidal environment and is slightly shifted towards the apical oxo-ligand (? 0.52 ?).

scholarly journals Transition metal complexes with thiosemicarbazide-based ligands. Part 57: Synthesis, spectral and structural characterization of dioxovanadium(V) and dioxomolybdenum(VI) complexes with pyridoxal s-methylisothiosemicarbazone

2010 ◽  
Vol 75 (8) ◽  
pp. 1063-1074 ◽  
Author(s):  
Vukadin Leovac ◽  
Vladimir Divjakovic ◽  
Milan Joksovic ◽  
Ljiljana Jovanovic ◽  
Ljiljana Vojinovic-Jesic ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Structural Characterization ◽  
Vanadium Complex ◽  
Molybdenum Complex ◽  
Octahedral Structure ◽  
X Ray

This work is concerned with the synthesis of neutral dioxovanadium(V) and dioxomolybdenum(VI) complexes with tridentate ONN pyridoxal S-methylisothiosemicarbazone (PLITSC) of the respective formulas [VO2(PLITSC-H)]?2H2O and [MoO2(PLITSC-2H)]. Structural X-ray analysis of the vanadium complex showed that it has an almost ideal square-pyramidal structure, while the molybdenum complex is supposed to have a polymeric octahedral structure. In addition to elemental analysis, both complexes were characterized by conductometric and magnetometric measurements, as well as by IR, UV-vis, 1H- and 13CNMR spectra.

scholarly journals Transition metal complexes with thiosemicarbazide-based ligands. Part 60. Reactions of copper(II) bromide with pyridoxal S-methylisothiosemicarbazone (PLITSC). Crystal structure of [Cu(PLITSC−H)H2O]Br•H2O

2014 ◽  
Vol 79 (3) ◽  
pp. 291-302 ◽  
Author(s):  
Vukadin Leovac ◽  
Ljiljana Vojinovic-Jesic ◽  
Sonja Ivkovic ◽  
Marko Rodic ◽  
Ljiljana Jovanovic ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Structural Characterization ◽  
Electronic Spectra ◽  
Square Planar

The synthesis and structural characterization of a square-planar copper(II) complex with pyridoxal S-methylisothiosemicarbazone (PLITSC) of the formula [Cu(PLITSC?H)H2O]Br?H2O (1) as the first Cu(II) complex with monoanionic form of this ligand were described. Complex 1 together with two previously synthesized complexes [Cu(PLITSC)Br2] (2) and [Cu(PLITSC)Br(MeOH)]Br (3) were characterized by elemental analysis, IR and electronic spectra and also by the methods of thermal analysis, conductometry and magnetochemistry.

scholarly journals Characterization of reactive organometallic species via MicroED

2019 ◽  
Author(s):  
Christopher Jones ◽  
Matthew Asay ◽  
Lee Joon Kim ◽  
Jack Kleinsasser ◽  
Ambarneil Saha ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Cryogenic Cooling ◽  
Structural Determination ◽  
X Ray ◽  
X Ray Crystallography ◽  
Diamagnetic Transition

Here we apply microcrystal electron diffraction (MicroED) to the structural determination of transition metal complexes. We find that the simultaneous use of 300 keV electrons, very low electron doses, and an ultra-sensitive camera allows for the collection of data without cryogenic cooling of the stage. This technique reveals the first crystal structures of the classic zirconocene hydride, colloquially known as “Schwartz’s reagent”, a novel Pd(II) complex not amenable to solution-state NMR or X-ray crystallography, and five other paramagnetic or diamagnetic transition metal complexes.

X-ray Crystal Structure of the N-(2-hydroxy-1-naphthalidene)phenylglycine Schiff Base. Synthesis and Characterization of its Transition Metal Complexes

2006 ◽  
Vol 31 (5) ◽  
pp. 580-585 ◽  
Author(s):  
Kalagouda B. Gudasi ◽  
Manjula S. Patil ◽  
Ramesh S. Vadavi ◽  
Rashmi V. Shenoy ◽  
Siddappa A. Patil ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Synthesis And Characterization ◽  
X Ray

scholarly journals Transition metal complexes with thiosemicarbazide-based ligands, part 47: Synthesis, physicochemical and voltammetric characterization of iron(III) complexes with pyridoxal semi-, thiosemi- and S-meth

2003 ◽  
Vol 68 (12) ◽  
pp. 929-942 ◽  
Author(s):  
Violeta Jevtovic ◽  
Ljiljana Jovanovic ◽  
Vukadin Leovac ◽  
Luka Bjelica
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
High Spin ◽  
Transition Metal Complexes ◽  
Elemental Analysis ◽  
Solution Equilibria ◽  
Electrode Processes ◽  
Voltammetric Study

The reaction of warm EtOH solutions of FeX3.nH2O (X=Cl, NO3) with tridentate ONX (X=O, S, N) pyridoxal semi-, thiosemi- and S-methylisothiosemicabazones (H2L1, H2L2, H2L3, respectively) yielded high-spin octahedral mono- and bis(ligand) complexes of the formula [Fe(H2L1-3)Cl2(H2O)]Cl,[Fe(HL1,2)2]Cl.nH2O and [Fe(H2L3)(HL3)]NO3)2.H2O. The compounds were characterized by elemental analysis, conductometric and magnetochemical measurements, IR and UV-Vis spectra. Besides, a detailed voltammetric study of the complexes was carried out in DMF solution in the presence of several supporting electrolytes, to characterize the nature of the electrode processes and solution equilibria.

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