Molecular complexes of aryltellurium(IV) chlorides

Garad, M. V.

doi:10.1016/s0277-5387(00)86963-6

Cited by 22 publications

(9 citation statements)

References 4 publications

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“…Further, evidence for the coordination mode of the ligand is obtained by 1 H NMR studies and chemical shift data for the free ligand (3-APY-{SalH}) and its complexes are compiled in Table 3. , shows downfield shifting as compared to free ligand, suggesting deshielding of azomethine proton due to cooedination to tellurium through the azomethine nitrogen 48,49,68,76 .…”

Section: Infrared Spectramentioning

confidence: 99%

“…Tellurium(IV) chloride is also known to form adducts with amides [31][32][33][34][35][36][37][38] and thiourea 39 , thus reflecting its acceptor behaviour. Also, organyltellurium(IV) chlorides are known [31][32][33][34][35][36][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56] to behave as Lewis acids and form complexes with several N˗, O˗ and S˗ donor bases. In view of this, we have investigated the reactions of tellurium(IV) chloride and organyltellurium(IV) chlorides with o-hydroxybenzaldehyde-3-aminopyridine Schiff base (3-APY-{SalH}), to synthesize some new complexes of tellurium(IV).…”

Section: Introductionmentioning

confidence: 99%

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Tellurium(IV) Complexes Containing Bidentate Schiff Base and their Biological Activities

2018

Chem Sci Trans

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Monobasic (ON) bidentate Schiff base ligand has been prepared by condensing o-hydroxybenzaldehyde with 3-aminopyridine. The new organyltellurium(IV) complexes, having formula [TeCl 3 (3-APY-{Sal})], [RTeCl 2 (3-APY-{Sal})] and [R 2 TeCl(3-APY-{Sal})] have been synthesized by reacting equimolar ratio of Schiff base (3-APY-{SalH}) with TeCl 4 , RTeCl 3 and R 2 TeCl 2 : where R=4-methoxyphenyl, 4-hydroxyphenyl, 3-methyl-4-hydroxyphenyl. The characterization of Schiff base and its complexes were carried out by elemental analyses, conductivity measurements, FTIR and 1 H NMR spectral studies. Also, the biological activities (antifungal and antibacterial) of the Schiff base ligand and some of its tellurium(IV) complexes have been studied.

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Section: Infrared Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tellurium(IV) Complexes Containing Bidentate Schiff Base and their Biological Activities

2018

Chem Sci Trans

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“…The absence of a singlet in high frequency region (δ 13.460 ppm), which typically corresponds to phenolic hydrogen indicates that N-2-pyridyl-5-chlorosalicylideneimine binds tellurium by deprotonated phenolic oxygen. The singlet that appears at δ 9.392 ppm is ascribed to azomethine hydrogen, which is less shielded after coordination through azomethine nitrogen 38,41,50,51,70,78 and appear in the downfield region 10.254-10.271 δ ppm. The complex multiplets found in the spectrum of complexes in the δ 6.840-8.651 ppm region corresponds to coupled hydrogen atoms of aromatic rings.…”

Section: H Nmr Spectramentioning

confidence: 99%

N-(2-Pyridyl)-5-chlorosalicylideneimine Schiff Base and its Tellurium(IV) Complexes: Synthesis, Characterization and In Vitro Biological Activities

2018

Chem Sci Trans

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“…The present study has thrown more light on the chelating behaviour of Schiff base derived from o-vanillin and 2-aminophenol towards organyltellurium(IV) chlorides which are known [51][52][53][54][55][56][57][58][59][60][61][62][63][64] to act as Lewis acid. These complexes have been examined for their antimicrobial activity against different strains of bacteria and fungi.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Some Tellurium(IV) Complexes of Bidentate(ON) Schiff Base Derived from o-Vanillin and 2-Aminophenol

2017

Chem Sci Trans

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Eight new organyltellurium(IV) chelates with bidentate Schiff base formed by condensation of o-vanillin and 2-aminophenol having formula o-VAPH.RTeCl 2 , o-VAPH.R 2 TeCl have been synthesized and characterized by elemental analyses, molar conductance, infrared and proton nuclear magnetic resonance spectral studies. The data predict the pentacoordination of tellurium atom by monobasic bidentate(ON) Schiff base having Ψtrigonal bipyramidal geometry. Some of these complexes have also been observed to possess antifungal and antibacterial activity. ExperimentalAll preparations were carried out under dry N 2 atmosphere and the solvents used were purified by standard method 65,66 before use. The purity of compounds was checked by TLC using silica gel-G (Merck). Melting points were determined in open capillary tube and are uncorrected.Carbon, hydrogen and nitrogen analyses were obtained microanalytically on a Thermo-Finnigan CHNS analyser from SAIF, Panjab University Chandigarh. Conductivity was measured in DMSO at 25±2 o C with a microprocessor based conductivity bridge type MICROSIL.Infrared spectra were recorded in KBr pellets on a FT-Infrared spectrophotometer model RZX (Perkin Elmer) at SAIF, Panjab University Chandigarh. Proton magnetic resonance spectra were recorded in DMSO-d 6 using TMS as an internal reference on BRUKER AVANCE II 400 NMR spectrometer. The antimicrobial screening was carried out by tube dilution method

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Molecular complexes of aryltellurium(IV) chlorides

Cited by 22 publications

References 4 publications

Tellurium(IV) Complexes Containing Bidentate Schiff Base and their Biological Activities

Tellurium(IV) Complexes Containing Bidentate Schiff Base and their Biological Activities

N-(2-Pyridyl)-5-chlorosalicylideneimine Schiff Base and its Tellurium(IV) Complexes: Synthesis, Characterization and In Vitro Biological Activities

Investigation on Some Tellurium(IV) Complexes of Bidentate(ON) Schiff Base Derived from o-Vanillin and 2-Aminophenol

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