Trichlorooxovanadium(V) derivatives of thio-Schiff bases

Kanoongo, Neeta; Singh, Ranvir; Tandon, J. P.

doi:10.1007/bf01023547

Cited by 9 publications

(7 citation statements)

References 9 publications

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“…UV/Vis spectra were acquired for 1 – 4 in DMSO (Figures S31–S34), and the assignments of the absorption bands are shown in Table 6. Charge transfer bands in the 266–292 nm region, which can be assigned to π→π* transitions associated with the thioamide moiety, are observed for 2 – 4 18a,26. These occurred at 266 and 292 nm (shoulder) for 2 , 270 and 288 nm (both shoulders) for 3 and 276 nm for 4 .…”

Section: Resultsmentioning

confidence: 95%

“…Charge transfer bands in the region 266-292 nm which can be assigned to π→π* transitions associated with the thioamide moiety are observed for compounds 2–4 . [18a, 26] These occurred at 266 nm and 292 nm (shoulder) for compound 2 , 270 nm and 288 nm (both as shoulders) for compound 3 , and 276 nm for compound 4 , respectively. Charge transfer bands assigned to n→π* transitions of aromatic rings are observed in the region 316-352 nm.…”

Section: Resultsmentioning

confidence: 99%

“…Charge transfer bands assigned to n→π* transitions of aromatic rings are observed in the region 316-352 nm. [18a, 19a, 26-27] These are observed as a shoulder at 316 nm for compound 2 , at 330 nm for compound 3 , and 352 nm for compound 4 , respectively.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis, Characterisation, and Preliminary In Vitro Studies of Vanadium(IV) Complexes with a Schiff Base and Thiosemicarbazones as Mixed Ligands

et al. 2011

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[VO(Sal-L-tryp)(H2O)] 1 (where sal-L-tryp = N-salicylidene-L-tryptophanate) was used as a precursor to produce the novel complexes, [VO(Sal-L-tryp)(MeATSC)].1.5C2H5OH 2 (where MeATSC = 9-Anthraldehyde-N(4)-methylthiosemicarbazone), [VO(Sal-L-tryp)(N-Ethhymethohcarbthio)].H2O 3 (where N-Ethhymethohcarbthio = (E)-N-ethyl-2-(4-hydroxy-3-methoxybenzylidene)hydrazinecarbothioamide), and [VO(Sal-L-tryp)(acetylethTSC)].C2H5OH 4 (where acetylethTSC = (E)-N-ethyl-2-(1-(thiazol-2-yl)ethylidene)hydrazinecarbothioamide), by reaction with the respective thiosemicarbazone. The chemical and structural properties of these ligands and complexes were characterised by elemental analysis, ESI MS, FT-IR, UV-visible, ESR, 1H and 13C NMR spectroscopy, and X-ray crystallography. DMSO and DMSO-d6 solutions of compounds 1-4 were oxidised in air to produce vanadium(V) species which were verified by ESI MS and 51V NMR spectroscopy. Anti-cancer properties of compounds 2-4 were examined with three colon cancer cell lines, HTC-116, Caco-2, and HT-29, and also with non-cancerous colonic myofibroblasts, CCD18-Co. Compounds 2-3 exhibited less inhibitory effects in the CCD-18Co cells, indicating a possible cytotoxic selectivity towards colon cancer cells. In general, those compounds which exhibited anti-proliferative activity on cancer cells, but did not affect non-cancerous cells, may have a potential in chemotherapy.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

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Synthesis, Characterisation, and Preliminary In Vitro Studies of Vanadium(IV) Complexes with a Schiff Base and Thiosemicarbazones as Mixed Ligands

et al. 2011

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“…In the spectra of 1:1 metal complexes, a new band also appears in the region 676-690 cm"' and which is due to the coordinated water molecule 13 . However in the spectra of manganese(II) complexes, bands due to NH vibrations disappear indicating deprotonation of the ligands and chelation of nitrogen with the manganese atom.…”

Section: Ir Spectramentioning

confidence: 97%

Biologically Potent Heterocyclic Sulphonamide Imines and Their Manganese (Ii) Complexes

Jain¹,

Nehra²,

Trivedi³

et al. 2003

Heterocyclic Communications

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Imines derived from different sulphadrugs and heterocyclic ketones and their Μη (II) complexes have been synthesized and characterized by their elemental analysis, molecular weight determinations, conductance and magnetic measurements. A high spin tetrahedral geometry around this metal ion has been proposed on the basis of magnetic and spectral studies. The unimolar and bimolar reactions of hydrated manganese acetate and chloride with monobasic, bidentate heterocyclic ligands resulted in the formation of the coloured solids which are soluble in DMF and DMSO. The molecular weight determinations indicate them to be monomers and their conductivity measurements in dry DMF show them to be non-electrolytes. All the ligands and their corresponding complexes have been screened for their fungicidal, bactericidal and nematicidal activities.Brought to you by | Purdue University Libraries Authenticated Download Date | 5/30/15 10:44 PM Vol. 9, No. I, 2003Biologiocally potent heterocyclic sulphonamide imines and their manganese(II) complexes

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“…This value shifted towards a lower frequency on coordination indicating the formation of a chelation between the oxygen of the carbonyl group and the metal ion [7]. The next strong band at 1580 cm-1 which was attributed to C=N group shifted towards a lower frequency on coordination [7 ,8] due to the decrease of the bond order as a result of metal nitrogen bond formation [7,8]. The position of the ligand in the range 3300-3500 cm-1 remained unaltered in the complexes indicating that there is no coordination through the NH group [7 ,8].…”

Section: Vi-determination Of Minimum Inhibitory Concentration (Mic)mentioning

confidence: 99%

Preparation, Characterization and Biological Activity of New Nickel(II) Complexes Containing Mixed Ligands

Dawood¹,

Shareef²

2007

J.Edu.Sci.

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Trichlorooxovanadium(V) derivatives of thio-Schiff bases

Cited by 9 publications

References 9 publications

Synthesis, Characterisation, and Preliminary In Vitro Studies of Vanadium(IV) Complexes with a Schiff Base and Thiosemicarbazones as Mixed Ligands

Synthesis, Characterisation, and Preliminary In Vitro Studies of Vanadium(IV) Complexes with a Schiff Base and Thiosemicarbazones as Mixed Ligands

Biologically Potent Heterocyclic Sulphonamide Imines and Their Manganese (Ii) Complexes

Preparation, Characterization and Biological Activity of New Nickel(II) Complexes Containing Mixed Ligands

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