Cobalt(III) complexes of some aromatic thiohydrazides – Synthesis, characterization and structure

Basak, Prodyut; Gangopadhyay, S.; De, Sudipta; Drew, Michael G. B.; Gangopadhyay, P. K.

doi:10.1016/j.ica.2010.01.011

Cited by 10 publications

(6 citation statements)

References 24 publications

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“…The ligands were synthesized as described earlier. 8 All other chemicals were of reagent grade and used without further purification; solvents were purified and dried according to the standard procedures. Electronic absorption and IR spectra were recorded on a Hitachi (Model U-3210) spectrophotometer and Unicam SP300S (KBr disks and Nujol mulls) respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The shortening of the bond length may be explained by extensive delocalization of π-electrons over the entire (2) Mo (1) (7) hydrazine moiety. The delocalization is also reflected in the lengthening of the CvN bond length [1.418(4) Å] from the usual CvN bond distances in hydrazones [C(52)-N(53) 1.294 (8) Å] in compound IIb.…”

Section: Table 1 Selected Bond Lengths (å) and Angles (°) Of Compoundmentioning

confidence: 99%

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Thiohydrazide complexes of molybdenum and their relevance to reduction of dinitrogen to ammonia

et al. 2015

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Aqueous solution of sodium molybdate reacts with aromatic thiohydrazides like thiobenzhydrazide, 2-hydroxythiobenzhydrazide, furan-2-thiohydrazide and thiophen-2-thiohydrazide to form green, neutral diamagnetic 1 : 3 chelates. They were characterized by elemental analysis and spectroscopic methods. Tris(2-hydroxythiobenzhydrazido)molybdenum(vi) was crystallized from benzene and the crystal structure shows that molybdenum(vi) is hexacoordinated to three sulfur and three nitrogen atoms from three identical ligands in facile trigonal prismatic geometry. The OH group is involved in intramolecular and intermolecular hydrogen bonding. The bound ligands of tris(thiohydrazido)molybdenum(vi) undergo a redox reaction differently depending on the solvents. Two complexes of molybdenum bound to those oxidized ligands were isolated and characterized and their structures were also solved. Of them a binuclear complex, containing two MoO2(2+) ions, of the ligand N-2-hydroxybenzoyl-N'-2-hydroxythiobenzoylhydrazine showed some capability to catalyze the reduction of dinitrogen to ammonia by sodium borohydride.

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Section: Methodsmentioning

confidence: 99%

Section: Table 1 Selected Bond Lengths (å) and Angles (°) Of Compoundmentioning

confidence: 99%

Thiohydrazide complexes of molybdenum and their relevance to reduction of dinitrogen to ammonia

et al. 2015

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“…Thiohydrazide ligands were prepared following the procedure described earlier [20]. Tris-acetylacetonatoiron(III) (Fe(acac) 3 ) was used as the starting material for the synthesis of thiohydrazide complexes by ligand displacement and prepared by standard method [21].…”

Section: Methodsmentioning

confidence: 99%

“…For all the complexes, the backbone vibrational signals such as C-C and C-H stretchings of the benzene ring, aromatic out of plane C-H bending, aromatic in plane C-H bending, aliphatic hydrizido N-N stretching, and C-N-N backbone bending ( (C-N-N)) remained unaltered following the metalation, indicating the robust nature of the backbone during the synthesis [20]. However, the C-N stretching band (](C-N)), which occurs in the range of 1580-1530 cm −1 in the ligands [20], shifted to higher frequency in the complexes suggesting partial double bond character in the C-N bond. On the other hand, the ](C=S) stretching vibration shifted to a lower frequency in the iron complexes indicating decrease of the bond order for C=S bond during metal coordination.…”

Section: Infrared Spectramentioning

confidence: 98%

Novel Low Spin Mixed Ligand Thiohydrazide Complexes of Iron(III): Synthesis, Spectral Characterization, Molecular Modeling, and Antibacterial Activity

Sengupta

Gangopadhyay

Goswami

et al. 2014

International Journal of Inorganic Chemistry

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Mixed ligand complexes of Fe(III) with aromatic thiohydrazides of general composition [Fe(acac)(L) 2 ] have been synthesized and characterized (acac-acetylacetonate, L = bidentate uninegative aromatic thiohydrazide ligand, for example, thiobenzhydrazide, 2-hydroxythiobenzhydrazide, furan-2-thiohydrazide, and thiophen-2-thiohydrazide). The magnetic susceptibility data and the EPR spectra of these complexes suggested the formation of rhombically distorted low spin iron center (d 5 ) in octahedral environment, which was also supported by the UV-vis spectral data of the complexes. Biological studies of these complexes also indicated that the iron-thiohydrazido complexes have superior antibacterial properties compared to the corresponding ligands.

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“…The ligands having nitrogen, oxygen and sulfur donor atoms served as excellent chelating agents for both transition and non‐transition metal ions as VO (II) ion . Coordination chemistry field attracts scientists to enrich studies, by offering new complexes have distinguish applications . Complexes of Schiff base or triazoles with different transition metals revealed wide range of potent implementations in various fields as medicinal, agriculture, catalysis and insecticides .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, analytical and spectral characterization for new VO (II)‐triazole complexes; conformational study beside MOE docking simulation features

El‐Metwaly

Farghaly

Elghalban

2020

Applied Organom Chemis

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New triazole‐derivatives were synthesized and characterized (spectral, analytical and conformational). After that, the new derivatives were coordinated with VO (II) atom to prepare new series of complexes. Distorted octahedral and square‐pyramidal geometries, were the geometries suggested based on UV‐ Vis and ESR spectra. A neutral poly‐dentate mode of bonding was proposed by 1:1 (M:L), for all complexes. TGA study supports the molecular formula of VO (II) complexes as well as, mass spectral‐analysis that executed for examples. The isotropic, anisotropic, molecular orbital and Hamiltonian parameters were estimated upon ESR spectra, for selected complexes. XRD patterns were executed for three complexes, two among appeared with particulate‐sizes in nanometer‐range. Conformational study was executed for all synthesizes applying RTD‐B3LYP‐FC method. Essential physical parameters were estimated and discussed. MOE‐docking that considered a bright part, was performed over all compounds towards 3s7s and 5jm5, as functional tumor proteins. The docking interaction parameters, introduced strongly some synthesizes to be anti‐tumor agents.

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Cobalt(III) complexes of some aromatic thiohydrazides – Synthesis, characterization and structure

Cited by 10 publications

References 24 publications

Thiohydrazide complexes of molybdenum and their relevance to reduction of dinitrogen to ammonia

Thiohydrazide complexes of molybdenum and their relevance to reduction of dinitrogen to ammonia

Novel Low Spin Mixed Ligand Thiohydrazide Complexes of Iron(III): Synthesis, Spectral Characterization, Molecular Modeling, and Antibacterial Activity

Synthesis, analytical and spectral characterization for new VO (II)‐triazole complexes; conformational study beside MOE docking simulation features

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