2024-03-28T20:51:44Z
https://ijcce.ac.ir/?_action=export&rf=summon&issue=1819
Iranian Journal of Chemistry and Chemical Engineering
Iran. J. Chem. Chem. Eng.
1021-9986
1021-9986
1995
14
2
Preparation of Ethylenediamine by Ammonolysis of 1,2-Dichloroethane in Nonaqueous Media
Mohammad
Rahimizadeh
Ghadir
Rajabzadeh
Kinetic parameters of the ammonolysis reaction of dichloroethane in nonaqueous media are studied and the optimum reaction conditions are reported. A suitable reactor for running the reaction under high pressure in the range of 50 to 500 °C is designed. Kinetic behaviours of the system is studied and other reaction parameters such as rate constant, kinetic order, and activation energy are determined. Gas-liquid chromatography with internal standard method was used for analyses of the samples under the optimized conditions..
Ethylenediamine
Preparation Kinetic
Ammonolysis
Nonaqueous
1995
12
01
55
58
https://ijcce.ac.ir/article_10962_032661326f280b34b6e761d1f8e8631f.pdf
Iranian Journal of Chemistry and Chemical Engineering
Iran. J. Chem. Chem. Eng.
1021-9986
1021-9986
1995
14
2
Extraction-Fluorimetric Determination of Trace Amounts of Mercury by 1,10-Diaza-18-Crown-6 and Rose Bengal
Mojtaba
Shamsipur
Mohsen
Kompani
A simple and sensitive extraction-fluorimetric method for the determination of mercury is reported. The method is based on the quantitative extractionof a ternary crown-mercury-rose Bengal complex into chloroform at pH 10 followed by fluorimetric measurements at 580 nm. A linear working range from 0.05 to 2.00 mg/mL is obtained. The relative standard deviation for 1.0 mg/mL mercury is 3.5%. The procedure was successfully applied to the determination of mercury in fish and mercurochrome.
Mercury
Determination
1
10-Diaza-18-crown-6
Rose Bengal
Extraction
Fluorimetry
1995
12
01
59
64
https://ijcce.ac.ir/article_10963_ccefecfadc93dee2efd447890087bab3.pdf
Iranian Journal of Chemistry and Chemical Engineering
Iran. J. Chem. Chem. Eng.
1021-9986
1021-9986
1995
14
2
Ring Cleavage of Some Bicylic Compounds Derived from 1,2,4-Triazine
Majid
M. Heravi
Mehdi
Bakavoli
Zohreh
Sadjadi Hashemi
Ring cleavage occurred when 1,2,4-triazino-1,2,4-triazines (3), (4) and (5) were treated with concentrated hydrochloric acid to yield N-substituted triazines (7) and (8). These confirm the given configuration assigned to the isomeric triazinotriazines. 6-Methyl-2-phenyl-7H-oxazolo [3,2-b][1,2,4]-triazin-7-one (9) underwent ring cleavage on treatment with sodium alkoxide to afford 3-alkoxy-1,2,4-triazines (10). Treatment of (9) with concentrated hydrochloric acid gave 6-methyl-2-phenacyl-1,2,4-triazin-3,5(4H)-dione (6). Under basic conditions, degradation of (9) occurred followed by ring closure of an intermediate to give 1-amino-4-phenylimidazole-2(3H)-one (11)
Bicyclic compounds derived from 1
2
4-triazine
Ring cleavage
1995
12
01
65
71
https://ijcce.ac.ir/article_10964_8fc3ec1e0fc6a1cd4c9ee9d9f9da0b4f.pdf
Iranian Journal of Chemistry and Chemical Engineering
Iran. J. Chem. Chem. Eng.
1021-9986
1021-9986
1995
14
2
Catalytic-Spectrophotometric Determination of Trace Amounts of Manganese(II) by Catalysis of the Oxidation of Ferroin with Periodate
Abbas
Afkhami
Hamid
Bahrami
A catalytic spectrophotometric method for determination of ultra-trace quantities of manganese(II) id described. The method is based on the catalytic effect of manganese(II) on the oxidation reaction of ferroin by potassium periodate in acidic media. The reaction is monitored spectrophotometrically at 510 nm by a slope method and Mn(II) is determinable in the range of 1-1000ngmL-1. The limit of detection is as low as 0.94ngmL-1. The proposed method was applied to the determination of manganese in milk.
Manganese(II)
Catalytic
Spectrophotometric
Ferroin
Periodate
1995
12
01
72
86
https://ijcce.ac.ir/article_10965_021ea1763b6e8a8a62f6add465eef810.pdf
Iranian Journal of Chemistry and Chemical Engineering
Iran. J. Chem. Chem. Eng.
1021-9986
1021-9986
1995
14
2
Poly(P-N-Chlorostyrenesulphonamide): A New and Efficient Chlorinating Agent for Aromatic Rings
Ardeshir
Khazaei
Ebrahim
Mehdipour
Bijan
Roodpeyman
Poly(p-N-chlorostyrenesulphonamide) synthesized via direct chlorination of poly[(p-styrene) sulphonamide], can be used for selective chlorination of aromatic compounds. Aromatic rings of the anisole, p-xylene, ethylbenzene and toluene are chlorinated with good yields. The polymer can be recovery, rechlorinated and reused several times.
Selective chlorination
Polymer supported halogenations
Chlorinated poly (p-styrenesulphonamide)
1995
12
01
77
80
https://ijcce.ac.ir/article_10966_87f650a66d2011f511a9d5ffb99a1d09.pdf
Iranian Journal of Chemistry and Chemical Engineering
Iran. J. Chem. Chem. Eng.
1021-9986
1021-9986
1995
14
2
Effect of Alkyl Substituents on the Hydrogen Bonding and Molecular Structure of Benzophenylhydroxamic Acids Crystal structure of UO2 Complex of p-Isopropylbenzophenylhydroxamic Acid
Masoud
Hojjatie
Subramaniam
Muralidharan
Saswait
P.Bag
Giris
C.Panda
Henry
Freiser
The effect of alkyl substituents on the C-phenyl and/or the N-Phenyl ring of benzophenylhydroxamic acid on their molecular structure and hydrogen bonding has been investigated. The predominant configuration in CHCl3 is determined by steric and electronic effects. Substituents on the C-phenyl ring favor the cis configuration, while substituents in the N-phenyl ring favor a trans configuration. These can be rationalized on the basis of electronic effects. Bulky substituents in the C-phenyl ring give rise to a mixture of cis and trans forms due to steric factors. When substituents are present on the C-phenyl ring and N-phenyl ring the trans configuration is preferred. The crystal and molecular structures of complex of p-isopropylbenzophenylhydroxamic acid have been determined from a single crystal of this complex to elucidate the effect of complexation on the structure of this ligand which exists as a cistrans mixture. Complexation occurs exclusively from the cis configuration.
Hydroxamic acids. Alkyl substituents
C-Phenyl ring effect
N-Phenyl ring effect
Hydrogen bonding
Molecular structure
1995
12
01
81
89
https://ijcce.ac.ir/article_10967_77b9508e0fcd8564585d7da824e4f5cb.pdf
Iranian Journal of Chemistry and Chemical Engineering
Iran. J. Chem. Chem. Eng.
1021-9986
1021-9986
1995
14
2
Effect of Alkyl Substituents on the Hydrogen Catalytic Osmylation of Cis and Trans 2-Cyclohexene-Cyclohexanol
Mohammad Raouf
Darvich
Jamshid
Mohammadi Rovshandeh
Catalytic osmylation of cis and trans 2-cyclohexene-cyclohexanol (1a) and (1b) are carried out in the presence of N-methyl morpholine-N-oxide. Under the same conditions, only the cis isomer reacted, leading to triol (3). The steric hindrance of the equatorial OH group probably prevents the trans isomer from entering into such reaction. Triol (3) was also obtained from the reduction of the diol-ketone (4).
Osmylation
N-methylmorpholine-N-oxide
Cis and trans-2-cyclohexene-cyclohexanol
Hydroxylation
1995
12
01
90
93
https://ijcce.ac.ir/article_10968_5238a4c9ca54a6c85791b5edc2fbb6f5.pdf
Iranian Journal of Chemistry and Chemical Engineering
Iran. J. Chem. Chem. Eng.
1021-9986
1021-9986
1995
14
2
Electrochemical and Spectroscopic Studies of Interactions of Mn(III) Complexes with Nucleic Bases and Nucleosides
Davar
Mohammadi Boghai
Bahram
Ghanbari
Massoud
Hassanpoor
The complexes of Mn(OAc)3 and/or Mn(acac)3 with nucleic bases and nucleosides (adenine, guanine, xanthine, adenosine and guanosine) have been synthesized in nonaqueous solution. Polarographic and spectroscopic (IR and Visible) methods have been used to establish the active site(s) on the imidazole and pyrimidine rings in the nucleic bases and nucleosides for the interaction with the Mn(III) complexes. Infrared spectroscopic results, indicate the N.9 site for adenine, N.1 site for adenosine and N.7 site for guanosine are the most probable sites of interaction with Mn(OAc)3. In addition, these results emphasize a dichotomy between N.9 and N.7 sites in adenine and between N.7 and N.1 sites of guanosine and adenosine. In the case of Mn(acac)3, the binding site for adenine changes to N.7, Which could be accounted for the formation of the hydrogen bond between acetylaceton ligand and NH2 group.
Site
Dichotomy
Oxygen-Evolving-Complexe (O.E.C)
1995
12
01
94
99
https://ijcce.ac.ir/article_10969_1c18cf1e0ac6aa613970bbddfe3c4dc5.pdf
Iranian Journal of Chemistry and Chemical Engineering
Iran. J. Chem. Chem. Eng.
1021-9986
1021-9986
1995
14
2
A Control System for A Pilot Batch Polymerization Reactor
Mohammad
Shahrokhi
Mahmood
Parvazinia
In this article several control schemes for a pilot scale polymerization reactor are proposed and one of them is selected as the most suitable design. The performances of proposed schemes have been compared through computer simulations. The controllers are PID and Chosen reaction is polymerization of methyl methacrylate which is highly exothermic.
polymerization
Batch reactor
Modeling
Gel effect
PID Controller
1995
12
01
100
105
https://ijcce.ac.ir/article_10970_28586fbdbfeda26fa09bc94cd0f9ea88.pdf