Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
A New Synthesis of Alpha-Hydroxycarboxylates and 2-Hydroxybenzoates
1
3
EN
Ali
Khalaj
Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran, I.R. IRAN
Reza
Abooafzeli
Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, P.O. Box 14155-6153, Tehran, I.R. IRAN
10.30492/ijcce.1997.10322
<em>A new synthesis of </em><em>a</em><em>-hydroxycarboxylates and 2-hydroxybenzoates based on the reaction of acetonides of </em><em>a</em><em>-hydroxycarboxylic acids and 2-hydroxybenzoic acid with sodium alkoxides in the corresponding alcohols as solvent is described. In general, decreasing the steric hindrance of the reactants and increasing the boiling points of alcohols increased the yields and decreased the required time for the reactions.</em>
Alpha-Hydroxycarboxylates,2-Hydroxybenzoates,Acetonides,Sodium alkoxides
https://ijcce.ac.ir/article_10322.html
https://ijcce.ac.ir/article_10322_17c80b2e03cfc3588f18b36d32ff310a.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
Synthesis and Characterization of Aminocarboxylato Iridium(III) Complexes
4
7
EN
Mohammad
Kooti
Department of Chemistry, Shahid Chamran University, Zip code 61355, Ahwaz, I.R. IRAN
Joseph S.
Merola
Department of Chemistry, Virgina Polytechnic Institute and State University, Blacksburg, VA 2406, USA
10.30492/ijcce.1997.10324
<em>Aminocarboxylic acids, such as 2-aminobenzoic acid, react easily with [Ir(COD)(PMe<sub>3</sub>)<sub>3</sub>]Cl, (COD=1,5-cyclooctadiene), in THF to produce hydridoaminocarboxylato iridium(III) complexes in high yields. These octahedral complexes are formed via oxidative addition reaction of the O-H bond of the carboxylic group with the central metal. The starting iridium(I) complex losses the COD molecule, the chloride is coordinated to the metal and the phosphine groups take a meridional position in the final products which are characterized by <sup>1</sup>H, <sup>13</sup>C and <sup>31</sup>P NMR spectroscopies.</em>
Irridium(III) complexes,Hydridoaminocarboxylato iridium (III) complexes,Aminocarboxylate complexes
https://ijcce.ac.ir/article_10324.html
https://ijcce.ac.ir/article_10324_e8e7cedb5e9c06862a356009a0c6bc74.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
Kinetic Studies of the Catalytic Oxidation of Toluene to Benzoic Acid in the Liquid Phase
8
9
EN
Fereydoon
Milani Nejad
Department of Chemistry, Ferdowsi University, Mashhad, I.R. IRAN
Mohammad
Rahimizadeh
Department of Chemistry, Ferdowsi University, Mashhad, I.R. IRAN
Hassan Ali
Mirshahi
Department of Chemistry, Ferdowsi University, Mashhad, I.R. IRAN
10.30492/ijcce.1997.10325
<em>The catalytic oxidation of toluene to benzoic acid in the liquid phase has been studied in an un-stirred tank reactor. Low concentration of acetic acid was added in order to increase the solubility of the catalyst in toluene. The dependence of the rate of reaction on the concentration of toluene catalyst and oxygen pressure was studied. It has been suggested that liquid phase oxidation of toluene to benzoic acid primarily is a diffusion controlled reaction and the order of reaction with respect to oxygen shifts to lower values by stirring.</em>
Catalytic oxidation,Toluene,Benzoic acid,Rate of reaction,Diffusion controlled reaction
https://ijcce.ac.ir/article_10325.html
https://ijcce.ac.ir/article_10325_789675a63f8ff2149828bd5c2c0adefd.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
Synthesis of 1,2,3,4,5,6,7,8-Octahydro-9-Ethoxy-10-Hydroxy-1-Anthracenone[OEHA]
10
14
EN
Abbas
Shockravi
Department of Chemistry, Faculty of Science Teacher Training University, Zip code 15614, Tehran, I.R. IRAN
abbas_shockravi@yahoo.co.uk
Kazem
Agh Nasiri
Department of Chemistry, Faculty of Science Teacher Training University, Zip code 15614, Tehran, I.R. IRAN
10.30492/ijcce.1997.10326
<em>Anthralin and some of its derivatives have implied antipsoriatic effect in clinical and pharmaceutical studies. Anthralin is synthesized by different strategies. In this work we report the synthesis of "OEHA" as a precursor of another biological active compound.</em>
Anthralin,Antipsoriatic activity,1-Hydroxy-9-Anthrone,Octahydro-9-ethyoxy-10-hydroxy-1-anthracenone
https://ijcce.ac.ir/article_10326.html
https://ijcce.ac.ir/article_10326_7d1102ea4e353c4d6f9ab8d185f6a28c.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
An Electrochemical Study of the S-Derivatives of 2-Amino Cyclopentene-1-Dithiocharboxylic Acid in Aqueous Ethanolic Media
15
18
EN
Afsaneh
Safavi
Department of Chemistry, Faculty of Science, Shiraz University, Zip code 71454, Shiraz, I.R. IRAN
safavi@chem.susc.ac.ir
Mohammad Bagher
Golivand
Department of Chemistry, Faculty of Science, Shiraz University, Zip code 71454, Shiraz, I.R. IRAN
10.30492/ijcce.1997.10327
<em>A systematic study on the electrochemical behavior of the S-derivatives of 2-amino cyclopentene-1-dithiocarboxylic acid (ACDA) has been carried out in aqueous ethanolic solutions by means of polarography, coulometry and voltammetry. All the compounds studied exhibited a well defined anodic wave corresponding to a diffusion controlled process. Controlled potential coulometry gave n=1 per mole for the anodic waves of the S-methyl and N-methyl S-methyl derivatives of ACDA, while for the dimer of ACDA a two electron oxidation wave was obtained.</em>
Electrochemical study,Dithiocarboxylic acid derivatives,Aqueous ethanolic media
https://ijcce.ac.ir/article_10327.html
https://ijcce.ac.ir/article_10327_31c2acc3b46392a5193108005dc8d22d.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
Estimation of the Unperturbed Chain Dimensions of Poly(Vinyl Chloride) Polymer by Various Methods
19
21
EN
Mohammad
Saleem Khan
National Center of Excellence in Physical Chemistry, Peshawar University, Peshawar, 25120, NWFP, PAKISTAN
Akhtar
Saeed
National Center of Excellence in Physical Chemistry, Peshawar University, Peshawar, 25120, NWFP, PAKISTAN
10.30492/ijcce.1997.10328
<em>Flory Fox, Kurata-Stockmayer, Berry, Inagaki-Suzuki-Kurata, Stockmayer-Fixman and Ahmad-Baloch methods based on the excluded volume theory have been applied to poly(vinyl chloride)-cyclohexanone system to obtain K</em><em><sub>q</sub></em><em> and the radius of gyration. A discussion on the reliability of these methods is given. The Stockmayer-Fixman and Ahmad-Baloch methods are found to be equally applicable.</em>
Unperturbed chain dimensions,PVC,K,Radius of gyration,Intrinsic viscosity
https://ijcce.ac.ir/article_10328.html
https://ijcce.ac.ir/article_10328_e5fcc3206c0ece63b7e4a8e6b83ec9a5.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
Spectrophotometric Study of Cobalt, Nickel, Copper, Zinc and Lead Complexes with Methylthymol Blue in Binary Water-Methanol Mixtures
22
28
EN
Raoof
Ghavami
Department of Chemistry, Shiraz University, Zip code 71454, Shiraz, I.R. IRAN
Hamid
Abdollahi
Department of Chemistry, Shiraz University, Zip code 71454, Shiraz, I.R. IRAN
Mohammad
Saleem Khan
Department of Chemistry, Razi University, Zip code 67145, Kermanshah, I.R. IRAN
10.30492/ijcce.1997.10329
<em>The complexation reactions between methylthymol blue (MTB) and Co<sup>2+</sup>, Ni<sup>2+</sup>, Cu<sup>2+</sup>, Zn<sup>2+</sup> and Pb<sup>2+</sup> ions have been studied in different water-methanol mixtures at pH 4.45 and 25 °C by a spectrophotometric technique. The stepwise stability constants of the resulting 1:1 and 2:1 (metal ion to ligand) complexes were determined from the absorbance-mole ratio data. It was found that the overall stability constants of the complexes formed increase in the order Zn<sup>2+</sup><Co<sup>2+</sup><Pb<sup>2+</sup><Ni<sup>2+</sup><Cu<sup>2+</sup> for all solvent mixtures studied. There is an inverse relationship between the overall stability of the complexes and amount of water in the mixed solvent. A linear relationship was observed between log </em><em>b</em><em><sub>2</sub></em><em> of the complexes and the mole fraction of methanol in the solvent mixture.</em>
MTB complexes,Stoichiometry,stability,Mixed solvent,Spectrophotometry
https://ijcce.ac.ir/article_10329.html
https://ijcce.ac.ir/article_10329_4cf2b210551ce0b3755fd2c778255292.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
Selective Mono Bromination of 1,4-Dihydropyridines
29
32
EN
Yousef
Rastgar Mirzaei
Organic Synthesis Research Lab., Faculty of Chemistry, Tabriz University, Zip code 51664, Tabriz, I.R. IRAN
Adeleh
Moshtaghi Zenouz
Organic Synthesis Research Lab., Faculty of Chemistry, Tabriz University, Zip code 51664, Tabriz, I.R. IRAN
10.30492/ijcce.1997.10330
<em>2-monobromomethyl 1,4-dihydropyridines is selectively synthesized by bromination of the parent compound by 1.1 equivalents of pyridinium bromide perbromide in dichloromethane/pyridine at -20 °C. The same reagent in dichloromethane at 0 °C produce the 2,6-bis(bromomethyl) 1,4-dihydropyridines.</em>
Nifedipine analogues,Calcium channel antagonist,1,4-Dihydropyridine,Bromomethyl-1,4-dihydropyridines
https://ijcce.ac.ir/article_10330.html
https://ijcce.ac.ir/article_10330_177d531e444eed09594a91daf5311df4.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
Synthesis of 2-Mono and 2,6-Disubstituted Methyl-1,4-Dihydropyridines
33
35
EN
Yousef
Rastgar Mirzaei
Organic Synthesis Research Lab., Faculty of Chemistry, Tabriz University, Zip code 51664, Tabriz, I.R. IRAN
Karim
Akbari Dilmaghani
Organic Synthesis Research Lab., Faculty of Chemistry, Tabriz University, Zip code 51664, Tabriz, I.R. IRAN
10.30492/ijcce.1997.10338
<em>The 2-mono and 2,6-disubstituted methyl-1,4-dihydropyridines were synthesized by reaction of morpholine, thiophenol, 8-hydroxyquinoline, 2-naphthol and 2-mercopto-1-methyl imidazole with the 2-mono bromo and 2,6-dibromo-1,4-dihidropyridines.</em>
Nitrenedipine analogues,Calcium channel antagonists,2-mono and 2,6-disubstituted 1,4-dihydropyridines
https://ijcce.ac.ir/article_10338.html
https://ijcce.ac.ir/article_10338_b121834ae222007b91ed37c0d793e8bd.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
Material Balance by Linear Equations
36
39
EN
Seyed Mohammad
Milani
Department of Chemical Engineering, Tarbiat Modarres University, P.O. Box 14155-4838, Tehran, I.R. IRAN
10.30492/ijcce.1997.10339
<em>Material Balance around process has been conducted by using mixer output equations. A method based on Mason's theory has been proposed to develop mixer output equations.</em>
Numerical method,Material balance,Linear process simulation,Mixer output equations,Mason's theory
https://ijcce.ac.ir/article_10339.html
https://ijcce.ac.ir/article_10339_92349fa35253b6d3b294b0bc9df9e9af.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
16
1
1997
06
01
The Effect of Superficial Feed Velocity on the Column Flotation Recovery in Comparison with the Conventional Flotation Cells
40
47
EN
Rahbar
Rahimi
Department of Chemical Engineering, Sistan and Baluchestan University, Zahedan, I.R. IRAN
Majid
Tahmooresi
Iranian Research Organization for Science and Technology, Kerman, I.R. IRAN
10.30492/ijcce.1997.10340
<em>Flotation is the most important process for concentrating mineral ores. This process may occur in any vessel such as column flotation, which has been used widely during the last decade and the conventional flotation cells. The effect of superficial feed velocity on the copper recovery was investigated using pilot-scale column flotation of "Sarcheshmeh Capper Complex". The results were compared with the conventional flotation cell data. It was reveled that for coarse particles (d<sub>80</sub> = 90 </em><em>m</em><em>m) this column could not be used instead of cells and rougher cells, but for small particles (d<sub>80</sub>=44 </em><em>m</em><em>m) it could. For coarse particles, recovery curve demonstrated a maximum with increase in feed rate. However, a minimum was observed for fine particles.</em>
Column flotation,Flotation cell,Recovery,Collecting zone,Cleaning zone
https://ijcce.ac.ir/article_10340.html
https://ijcce.ac.ir/article_10340_49111942add88e823c52ebd5722b9ed2.pdf