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Browsing Journal of the Chemical Society of Pakistan by Issue Date

Browsing Journal of the Chemical Society of Pakistan by Issue Date

Now showing items 21-40 of 651

Synthesis of 2,4-Dihydroxy-1,5-Diphenyl- Pentane-1,5-Dione and its Reactions with Ureas.

ANTHONY R. BUTLER; AGNES MUIR (The Chemical Society of Pakistan, 1988-12-03)

2,4-Dihydroxy-1, 5-diphenyl pentane-1, 5-dione (3b) has been synthesised by the hydrolysis of 2,4-dibromo-1, 5-diphenyl pentane-1, 5-dione in 75% aqueous acetone containing silver oxide acting as catalyst. During hydrolysis ...
Synthesis of Nitrogeneous Compounds from 6-Unsaturated 1, 3-Dicarbonyl Esters. Part I. Substituted Pyrazoles, Isoxazoles and Oxyquinoxalines

HASSAN M. MOKHTAR (The Chemical Society of Pakistan, 1988-12-04)

Condensation of 4-substituted-but-3-en-2-ones (1) with ethyl oxalate gave ethyl 6-aryl-2,4-dioxo-A2-hexenoates (2) and were interconverted to the methyl esters by alcoholysis. Compounds (2) were converted by hydrazine or ...
Carbonization of Walnut Shells and the Determination of Surface Acidity of Charcoal by Selective Neutralization Technique

M. ARSALA KHAN; FAZAL RABBI (The Chemical Society of Pakistan, 1988-12-05)

Charcoal obtained from walnut shells were studied for determining the acidic surface complexes by selective neutralization technique using bases of different strengths. Effect of time, benzene extraction and demineralization ...
Determination of Chromium in Collected Leather Samples and Tannaries Waste by Spectroscopic Techniques.

MOHAMMAD RASUL JAN; MOHAMMAD DAUD; SHAHID PERVEZ; SAEED ANWAR (The Chemical Society of Pakistan, 1988-12-06)

Chromium was extracted from collected leather samples by two different methods and in the extracted solution chromium was determined by U.V./Vis and atomic absorption methbds. The chromium values in the extracted solution ...
Cyclisation Reaction of Dibenzoylmethanemono-- (tosylhydrazone) with Butyllithium and Lead tetraacetate.

C.M. ASHRAF; MUSHTAQ AHMAD (The Chemical Society of Pakistan, 1988-12-07)

Dibenzoylmethanemono(tosylhydrazone) undergoes cyclisation reaction with butyllithium and lead tetraacetate to afford 3,5-diphenylpyrazole in good yield in both cases. Mechanistic schemes have been postulated to account ...
Studies on the Condensation of 1,3-Diaryl-propen-1-one with Ethyl Cyanoacetate

S.EL-NAGDY; F.A.EL-BASSIOUNY; I. ATTIA; M.R. MAHMOUD (The Chemical Society of Pakistan, 1988-12-08)

Michael condensation of 1[p-bromopheny1]-34p-chlorophenyli-propen¬1-one [I] with ethyl cyanoacetate in the presence of ammonium acetate leads to the formation of (II) 6[p-bromopheny1]-2-hydroxy-44p-chlorophenyll nico¬tinonitrile, ...
Phase Transfer Synthesis of Sulphamethoxazole 1 N (methyl 2,3,4-tri-O-acety1-13-D-glucuronide)

BASHIR AHMAD; J.W.POWELL (The Chemical Society of Pakistan, 1988-12-09)

Sulphamethoxyazole-N1 -(methyl 2,3,4-tri-O-acetyl-6-D-glucuronide) was successfully synthesized and characterized by NMR and mass spectrometry for the metabolic study of suiphamethoxazole.
Synthesis of N-Methylbutobarbitone-N-(methyl 2,3, 4-tri-O-acetyl-B-D-glucuronide) under Phase Transfer catalysed condition

BASHIR AHMAD; J.W. POWELL (The Chemical Society of Pakistan, 1988-12-10)

N-Methylbutobarbitone-N-glucuronic acid (protected) was successfully synthesized by a phase transfer catalysed reaction; it was then characterized by proton NMR and mass spectrometry (EI), for use in investigating the human ...
Large Amplitude Pulse Voltammetry of Aromatic Amino Compounds

INAM UL HAQUE (The Chemical Society of Pakistan, 1988-12-12)

Large amplitude pulse voltammetry of aniline, p-anisidine, p-phenetidine, p-chloroaniline and m- dimethylaminoanisidine in nearly neutral aqueous solution at low concentrations shows that the anodic oxidation of these ...
Determination of Some Naturally Occuring Hydroxylated Anthraquinones by Differential Pulse Polarography

A. TEMIZER; A.N. ONAR; M.T. ORBEY; B. SENER; M. BASGUL (The Chemical Society of Pakistan, 1988-12-13)

Differential pulse polarographic analyses were carried out on the hydroxylated anthraquinone contents of various Rumex species growing in Turkey. Alizarin and emodin, which were extracted both from the roots and aerial ...
Some New Tin(II) Complexes of Schiff Bases Derived from Sulphadrugs

A.K. VARSHNEY; J.P. TANDON (The Chemical Society of Pakistan, 1988-12-14)

Reactions of tin(II) methoxide with the Schiff bases derived by the condensation of salicyladehyde and sulfadrugs have resulted in the isolation of some new tin(II) derivatives. These have been characterized on the bases ...
On the Formation of Mn(II) Anthranilic Acid Anilide Complexes. Structural Elucidation by TGA, IR, Electronic, EPR Spectra and Potentiometric Studies

SAMY; M.ABU-EL-WAFA; MOSTAFA A.EL-BEHAIRY; RAAFAT M. ISSA; AKILA A. SALEH (The Chemical Society of Pakistan, 1988-12-15)

A new series of Mn(1I)-anilide complexes have been prepared and chara¬cterized by elemental analysis, TGA and IR spectra. Electronic and EPR spectra indicate octahedral geometry around the MN(II) ion, where the solvent ...
A High Yield Method of Preparation of Pyridine-2-aldehyde

RASHID IQBAL; AWAD EL-HOSSADI; SABIHA SARWAR BAQAI (The Chemical Society of Pakistan, 1988-12-16)
Review: Glycoproteins: Biologically Vital Macromolecules

NASIR-UD-DIN; EVELYNE WALKER-NASIR; M.A.K.MALGHANI; S.ALTAF HUSSAIN (The Chemical Society of Pakistan, 1988-12-17)
Sesquiterpenoids of Ferula Species

HASSAN M.G.AL-HAZIMI (The Chemical Society of Pakistan, 1988-12-18)
Determination of Gadolinium and Samarium in Aqueous Solution by X-Ray Fluorescence Spectrometry

M. SALEEM; M. AFZAL; RIAZ QADEER; JAVED HANIF (The Chemical Society Of Pakistan, 1993-09-01)
An Infrared Study of the Adsorption of CO on Supported Bimetallic Catalyst System

S. TAJAMMUL HUSSAIN (The Chemical Society Of Pakistan, 1993-09-02)
Stability of Response of Red PMMA Dosimeters at Different Temperatures

HASAN M. KHAN; GULZAR AHMAD; MIAN S. WAHID; SHAD A. KHAN (The Chemical Society Of Pakistan, 1993-09-03)
Gas Chromatographic Determination of Chloride using 2,4-Dichlorophenylboroic acid as a Derivatizing Reagent

A. SARAFRAZ-YAZDI; W.I. STEPHEN (The Chemical Society Of Pakistan, 1993-09-04)
Some Aspects of Solute Concentration and Zone area of the spot for Detection and Quantitation of Amino Acids by Paper Chromatography

M. AMINUDDIN; IFFAT I IAMEED; M. AHMAD (The Chemical Society Of Pakistan, 1993-09-05)

Now showing items 21-40 of 651

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