Transition metal complexes of novel ring-bridged bis(.eta.5-cyclopentadienyl) ligands. Their synthesis, chemistry, and structural characterization

1977 ◽  
Vol 99 (14) ◽  
pp. 4846-4848 ◽  
Author(s):  
P. A. Wegner ◽  
V. A. Uski ◽  
R. P. Kiester ◽  
S. Dabestani ◽  
V. W. Day
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Structural Characterization ◽  
Cyclopentadienyl Ligands

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 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 ?).

Stacking interactions of the methylated cyclopentadienyl ligands in the crystal structures of transition metal complexes

2020 ◽  
Vol 76 (2) ◽  
pp. 252-258 ◽  
Author(s):  
Dušan P. Malenov ◽  
Jelena P. Blagojević Filipović ◽  
Snežana D. Zarić
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Transition Metal Complexes ◽  
Electrostatic Potential ◽  
Stacking Interactions ◽  
Cyclopentadienyl Ligands ◽  
Π Interactions ◽  
Structural Database ◽  
Oppositely Charged

In the crystal structures of methylated cyclopentadienyl (Cp) complexes (MeCp, Me4Cp and Me5Cp) deposited in the Cambridge Structural Database, certain orientation types of stacked contacts can be noted as the most frequent. These orientation preferences can be well explained by the matching of oppositely charged regions of electrostatic potential. Parallel displaced stacking, large offset stacking and C—H...π interactions are the dominant interaction types that are responsible for the arrangement in the crystal structures of stacked methylated Cp complexes.

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