Journal of Chemistry

Papers

Voulume: 4
Issue: 2
Article No. 1
Reactions of Hexaphentyldilead with Bifunctional tridentate schiff bases
Deepika Bansal
Department of Chemistry, University of Rajasthan, Jaipur-302044 (INDIA)
Man Mohan
Department of Chemistry, University of Rajasthan, Jaipur-302044 (INDIA)
R.K. Mittal
Department of Chemistry, University of Rajasthan, Jaipur-302044 (INDIA)
Abstract :


 The reactions of hexaphenyldilead with bifunctional tridentate Schiff bases in 1:2 molar ratio have been studied in the medium of anhydrous benzene. Complexes of the type R3Pb-SBH (where R= -C6H5) have been synthesized. All the reactions were found to be quite facile and lead-lead bond was found to be cleaved in preference to the lead-carbon bond. The resulting derivatives were isolated in the form of yellow solids. They were quite stable in air and not easily attacked by the moisture. They are soluble in DMF and DMSO only.

In these complexes, the lead atom attains a coordination number of six and have octahedral structures.

 

Keyword : Reaction of Hexaphentyldilead, Bifunctional tridentate
DOI : juc
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Article No. 2
Copper (II) Sulphate nanoparticle based Membrane ion sensors-its preparation and analytical application
J. Thamarai Selvi
Department of Chemistry, Avinashilingam University for women, Coimbatore - 641043 (INDIA)
K. Krishnaveni
Department of Chemistry, Avinashilingam University for women, Coimbatore - 641043 (INDIA)
Abstract :

 A Copper sulphate nano particle have been used as ion carriers for the preparation of copper (II) selective membrane sensors. This electrode give near -Nerstian responses in the linear concentration range of 1x 10-1M to 1x10-6 M with detection limits of the order of 10-6 M. The stable potentiometric signals are obtained with in a short time period of 5 seconds. The effect of pH and the effect of medium have been studied found to give better response. Selectivity coefficient values have been evaluated using fixed interference method. The sensors have also been used as an indicator electrode in potentiometric titration of copper (II) ions with EDTA and its determination in Black pepper.
 

 

Keyword : Nano particle, selective membrane sensors
DOI : juc
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Article No. 3
Evaluation of extract of Ficus benghalensis as corrosion inhibitor for mild steel in hcl medium at different pH
S. SUBHASHINI
Department of Chemistry, Avinashilingam University for women, Coimbatore - 641043 (INDIA)
R. RAJALAKSHMI
Department of Chemistry, Avinashilingam University for women, Coimbatore - 641043 (INDIA)
T. ELAKKIYA
Department of Chemistry, Avinashilingam University for women, Coimbatore - 641043 (INDIA)
M. SRIMATHI
Department of Chemistry, Avinashilingam University for women, Coimbatore - 641043 (INDIA)
Abstract :

Economic losses due to corrosion are direct, as well as, indirect and affect the economy of country. Corrosion inhibitors are one of the widely used methods to control corrosion. Particular advantage of corrosion inhibitor is that often can be implemented or changed in situation without disturbing a process. Due to toxic nature and high cost of some inhibitors currently in use it is nearly to develop environmentally acceptable and less expensive inhibitors. Natural product can be considered as a good source for this purpose. As evaluation of the performance of acid extract of Ficus benghalensis (FB) bark on the corrosion inhibition of MS in 2N, 3N and 4N hydrochloric acid at different temperatures were studied. Weight loss, electrochemical polarization and impedance measurement techniques were conducted. The efficiency of the inhibitor was noticed to increase with increase in concentration of the inhibitor.

Keyword : Ficus benghalensis, corrosion inhibitor for mild steel, hcl medium at different pH
DOI : juc
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Article No. 4
Electrochemical Studies of In(III) complexes with 2,2´-Oxydiacetic acid in aqueous and aqueous-nonaqueous media (Methanol/Ethanol)
SUNITA SHARMA
Department of Chemistry, University of Rajasthan, Jaipur-302044 (INDIA)
Arvind Sharma MEENA
Department of Chemistry, University of Rajasthan, Jaipur-302044 (INDIA)
O.D. GUPTA (gupta_od@yahoo.com)
Department of Chemistry, University of Rajasthan, Jaipur-302044 (INDIA)
Abstract :

 

The polarographic determination of stability constants of metal complexes of In(III) with 2-2´ Oxydiacetic acid under varying temperatures, at 300K and 310K and in various aqueous and aqueous non-aqueous media, have shown the formation of 1:1 and 1:2 complexes. The values of overall stability constants of complexes have been calculated by DeFord and Hume's method which is further verified by Mihailov's method. The reduction process was found to be reversible and diffusion controlled involving three electron transfer. The change in thermodynamic parameters DG°, DH°, and DS° accompanying complexation have been also evaluated. It was found that the stability constants of In(III)-2,2´-Oxydiacetic acid system in aqueous non-aqueous medium are greater than in aqueous medium.
Ke words : Electrochemical, polarography, dropping mercury electrode, effect of temperature, 2,2´-Oxydiacetic acid, In(III), Mihailov's method and DeFord and Hume's method.

 

Keyword : Electrochemical, polarography, dropping mercury electrode, effect of temperature
DOI : juc
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Article No. 5
Reactions of Hexaphenyldilead with Monofunctional bidentate schiff bases
Deepika Bansal
Department of Chemistry, University of Rajasthan, Jaipur-302004 (INDIA)
Man Mohan
Department of Chemistry, University of Rajasthan, Jaipur-302004 (INDIA)
R.K. Mittal
Department of Chemistry, University of Rajasthan, Jaipur-302004 (INDIA)
Abstract :

 

The reactions of hexaphenyldilead with monofunctional bidentate Schiff bases in 1:2 molar ratios have been studied in the medium of anhydrous benzene. Complexes of the type R3Pb-SB (where R= -C6H5) have been synthesized. All the reactions were found to be quite facile and lead-lead bond was cleaved in preference to the lead-carbon bond. The resulting derivatives were obtained in the form of yellow solids. The molar conductance measurements show that they are non-electrolytes. In these complexes, the central lead atom probably acquires coordination number of five and have trigonal bipyramidal structures.

 

Keyword : Hexaphenyldilead, Monofunctional bidentate
DOI : juc
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Article No. 6
Synthesis and anticonvulsant activity of  2-(substituted phenylimino)-3-(5-substituted phenyl-1, 3, 4-thiadiazol-2-yl)-1, 3-thiazolidin-4-one
Siddiqui N.
Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Jami Hamdard (Hamdard University), Hamdard Nagar, New Delhi - 110062 (INDIA)
Arshad M.F.
Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Jami Hamdard (Hamdard University), Hamdard Nagar, New Delhi - 110062 (INDIA)
Khan S.A.
Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Jami Hamdard (Hamdard University), Hamdard Nagar, New Delhi - 110062 (INDIA)
Abstract :


Some 2-(substituted phenylimino)-3-(5-substituted phenyl-1, 3, 4-thiadiazol-2-yl)-1, 3-thiazolidin-4-ones were synthesized in good yields by appropriate synthetic route and characterized on the basis of spectral data and elemental analysis. The compounds were evaluated for anticonvulsant activity. The compounds 4a, 4c, 4e, 4f, 4i and 4j were potent in MES test and were less neurotoxic comparable to standard drug phenytoin.
 

Keyword : Thiadiazole, Thiazolidinones, Anticonvulsant, Neurotoxicity
DOI : juc
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Article No. 7
Spectral and antifungal studty of 4 methyl 1-2-dihydro-2-oxo-quinazoline semicarbazone / thiosemicarbazone and its metal complexes
B. K. RAI
Department of Chemistry,L.N.T. College, Muzaffarpur (INDIA)
ARBIND KUMAR
Department of Chemistry, Shyam Nandan Sahay College, Muzaffarpur (INDIA)
Abstract :


Complexes of Co(II), Ni(II) and Cu(II) with Schiff bases derived from 4-methyl, 1-2-dihydro-2-oxoquinazoline have been synthesized. The isolated compounds have been characterized by elemental analysis, molar conductance, magnetic moment and spectral data. On the basis of spectroscopic studies, the Schiff bases, 4-methyl-1-2-dihydro-2-oxoquinazoline semicarbazone [MDOQS] and 4-methyl-1-2-dihydro-2-oxoquinazoline thiosemicarbazone [MDOQT] behaves as a tridentate chelating agent and bonded to the metal ion through amine and imine nitrogen and oxygen/sulphur atoms of either semicarbazone or thiosemicarbazone moiety. The ligands and metal complexes were also screened for antifungal activity.
 

Keyword : MDOQS, MDOQT, Schif Base, Metal Complexes, Antifungal Activity
DOI : juc
Paper Download Count : 0
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Article No. 8
Zinc (II) sulphate nanoparticle based membrane ion sensors-its preparation and analytical application
J. Thamarai selvi
Department of Chemistry, Avinashilingam University for women, Coimbatore - 641043 (INDIA)
G. Shanthi
Department of Chemistry, Avinashilingam University for women, Coimbatore - 641043 (INDIA)
Abstract :

A Zinc sulphate nano particles have been used as ion carriers for the preparation of Zinc (II) selective membrane sensors. This electrode give near -Nerstian responses in the linear concentration range of 1x 10-1M to 1x10-6 M with detection limits to the order of 10-6 M. The stable potentiometric signals are obtained within a short time period of 5 seconds. The effect of pH and the medium have been studied and found to give better response. Selectivity coefficient values  have been evaluated using fixed interference method. The sensors have also been used as an indicator electrode in potentiometric titration of Zinc (II) ions with EDTA and its determination in pharmaceutical products.
 

Keyword : Nano particle, selective membrane sensors
DOI : juc
Paper Download Count : 0
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Article No. 9
Synthesis of 2-imino-4-oxo-thiazolidino based quinoxalinediones as antitubercular agents
P.Y. PAWAR
P.D.V.V.P. Fs, College of Pharmacy, Post MIDC, Vilad Ghat, Ahmednagar - 414 111, (MS) INDIA
S.B. BHISE
Government College of Pharmacy, Karad - 415 124 (MS) INDIA
Abstract :

6,7-bis[3-(4-substitutedphenyl)-4-oxo-thiazolidin-2-ylideneamino] quinoxa line-2,3(1H,4H)-diones (3a-e) have been synthesized by cyclisation of 6,7-bis[3'-aryl thiocarbamido]-quinoxaline-2,3(1H, 4H)-diones (2a-e) in presence of mono-chloroacetic acid, sodium acetate and glacial acetic acid. 6,7-Bis[3'-aryl thiocarbamido]-quinoxaline-2,3(1H,4H) -diones were obtained by reaction of 6,7-diaminoquinoxaline-2,3(1H,4H)-dione with substituted aromatic isothiocyanate. The constitution of the synthesized compounds is supported by IR, 1H NMR, Mass and elemental analysis. The compounds were subjected to preliminary in-vitro evaluation for antitubercular activity against Mycobacterium tuberculosis H37RV strain.
 

Keyword : Quinoxaline-2, antitubercular activity
DOI : juc
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Article No. 10
Synthesis of Some Thiazolidino-pyrimidines and Their Related Compounds
A.K. NAG
P.G. Department of Chemistry, College of Commerce Patna (INDIA)
R.N. PANDEY
Department of Chemical Engineering, BITS, Pilani, Goa, Campus, Zuarinagar, Goa (INDIA)
SEEMA SINHA
Department of Chemical Engineering, BITS, Pilani, Goa, Campus, Zuarinagar, Goa (INDIA)
RITA SINGH
Department of Chemical Engineering, BITS, Pilani, Goa, Campus, Zuarinagar, Goa (INDIA)
SIDDHARTHA K.R. SINGH
Department of Chemical Engineering, BITS, Pilani, Goa, Campus, Zuarinagar, Goa (INDIA)
Abstract :

Substituted thiazolidinones have been used as the starting material in the present work. Thiazolidinones contain an active methylene group at 5-position. These methylene groups readily react with aromatic aldehydes to form benzylidene derivatives of the thiazolidinones. These benzylidene derivatives possess unsaturated carbonyl group which are further allowed to react with urea to form different pyrimidine rings after cyclisation.

Keyword : Synthesis of Some Thiazolidino, pyrimidines and Their Related Compounds
DOI : juc
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