Catalytic Spectrophotometric Determination of Traces of Tellurium (IV)
Mojtaba
Shamsipur
Department of Chemistry, Shiraz University, Postcode 71454, Shiraz, I.R. IRAN
author
Mir Fazlollah
Mousavi
Department of Chemistry, Shiraz University, Postcode 71454, Shiraz, I.R. IRAN
author
text
article
1995
eng
A Simple, rapid and sensitive method has been developed for determination of trances of tellurium (VI) (0.096-1.250 mg/mL) based on its catalytic effect on the reduction reaction of toluidine blue by sulfide ion at pH 4. The reaction is monitored spectrophotometrically by measuring the decrease in absorbance of the dyestuff at 628 nm by the fixed time method. The detection limit is 80 ng/mL and the relative standard deviation for 1 mg/mL tellurium is 2.2%.
Iranian Journal of Chemistry and Chemical Engineering
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
1021-9986
14
v.
1
no.
1995
1
5
https://ijcce.ac.ir/article_10160_9ed3f6bfde4732ac69e1e0a3dd5519e8.pdf
dx.doi.org/10.30492/ijcce.1995.10160
Preparation and Characterization of 2-(Methylamino) Pyridine Complex of Cu(I)
Hossein
Aghabozorg
Department of Chemistry, Faculty of Science, Teacher Training University, Postcode 15614, Tehran, I.R. IRAN
author
Hassan
Hosseini Monfared
Department of Chemistry, Faculty of Science, Teacher Training University, Postcode 15614, Tehran, I.R. IRAN
author
text
article
1995
eng
2-(Methylamino) pyridine (HMAP) reacts with MeLi in THF and generates the lithium salt (LiMAP). Further reaction of [Cu(TMEDS)2][CuCl2] (TMEDA=tetramethylethylenediamine) with one equivalent of this ligand in THF leads to the formation of a yellow dimeric Cu(I) complex, [Cu(MAP)]2. Analytical data, molecular weight, and magnetic susceptibility measurements, confirm the formula [Cu(MAP)]2 .
Iranian Journal of Chemistry and Chemical Engineering
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
1021-9986
14
v.
1
no.
1995
6
9
https://ijcce.ac.ir/article_10161_d5544091835c539aabbafd9a692fc12f.pdf
dx.doi.org/10.30492/ijcce.1995.10161
The Preconcentration and Determination of Pb2+, Cu2+, Co2+, Ni2+, Fe2+ and Zn2+ Elements in Water Samples Using Citrate Form of Anion-Exchange Resin
Mohammad Hossein
Arbab Zavar
Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, I.R. IRAN
author
Maryam
Kazemipour
Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, B.O. Box 91735-654, Mashhad, I.R. IRAN
author
text
article
1995
eng
Lead, copper, cobalt, nickel, iron and zinc ions form monocitrate complexes (negative charge) in citrate solution which is absorbed on the citrate form of anion-exchange resins (citrate as counter ion) y exchange of citrate ion with citrate complexes. These are subsequently recovered from the resin by 0.5M ammonium citrate eluent at pH 2.0. Under optimized conditions, quantitative recovery was achieved simultaneously for lead, cobalt, copper, nickel, iron and zinc (preconcentration factor 20). Each element could be determined by atomic absorption spectroscopy (AAS) with high precision.
Iranian Journal of Chemistry and Chemical Engineering
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
1021-9986
14
v.
1
no.
1995
10
15
https://ijcce.ac.ir/article_10162_878bde1bd1173debf8c985662ce87fad.pdf
dx.doi.org/10.30492/ijcce.1995.10162
Efficient Synthesis of a Range of 1-Hydroxy-2-(1-Alkyloxymethyl)-9,10-Anthraquinone Derivatives
Hashem
Sharghi
Department of Chemistry, Shiraz University, Postcod 71454, Shiraz, I.R. IRAN
author
Ali
Forghaniha
Department of Chemistry, Shiraz University, Postcod 71454, Shiraz, I.R. IRAN
author
text
article
1995
eng
Five new 1-hydroxy-2-(1-alkyloxymethyl)-9,10-Anthraquinones (9a-e) have been prepared. Selective nitration of 2-methyl-9,10-anthraquinone, reduction to the corresponding amine, diazotization and treatment by sulfuric acid solution afforded the 1-hydroxy-2-methyl-9,10-anthraquinone in good yield as the key intermediate. Reaction with dimethylsulphate/K2CO3 and subsequent monobromination with NBS/CCL4 produced 1-methoxy-2-(bromomethyl)-9,10-anthraquinone. A mixture of HBr/AcOH was used for demethylation. Treatment of hydroxybromo derivatives with different alcohols afforded corresponding ethers in high yields.
Iranian Journal of Chemistry and Chemical Engineering
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
1021-9986
14
v.
1
no.
1995
16
22
https://ijcce.ac.ir/article_10163_ae31611d6c53fed3c6dcfe063255a371.pdf
dx.doi.org/10.30492/ijcce.1995.10163
Synthesis of 1,5-Dihydroxy-9,10-Anthraquinone
Abbas
Shockravi
Department of Chemistry, Teacher Training University, Postcode 15614, Tehran, I.R. IRAN
author
J.M.
Bruce,
Department of Chemistry, Manchester University, M13 9PL ENGLAND
author
text
article
1995
eng
The synthesis of 1,5-dihydroxy-9,10-anthraquinone (17); (1,5-DHA) was accomplished during, attempts towards the synthesis one of its derivatives called anthralin (1,8-dihydroxy-9-anthrone) which is known as an antipsoriasis drug since 1916 [1]. This work is a new reigiospecilic preparation of 1,5-DHA based on Friedel-Crafts reaction starting from 1,4-dimethoxybenzene. This synthetic route, in addition to being successful, produced interesting by-products, in terms of biological activities. The advantage of this work over other attempts is the use of inexpensive materials and mild reaction conditions.
Iranian Journal of Chemistry and Chemical Engineering
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
1021-9986
14
v.
1
no.
1995
23
31
https://ijcce.ac.ir/article_10164_8d98eed4c924f10227421bf16e74d5ee.pdf
dx.doi.org/10.30492/ijcce.1995.10164
Synthesis of Functional Silylated Acylalkynes
Mohammad Reza
Saidi
Department of Chemistry, Sharif University of Technology, P.O. Box 13465-9176, Tehran, I.R. IRAN
author
Mohammad Mehdi
Mojtahedi
Chemistry & chemical Engineering Research Center of Iran, P.O. Box 14132-186, Tehran, I.R. IRAN
author
Seyyed Mohammad
Bolourchian
Chemistry & chemical Engineering Research Center of Iran, P.O. Box 14132-186, Tehran, I.R. IRAN
author
text
article
1995
eng
Functional trimethylsilylacetylenes 2(a-i) with different functional groups were synthesized from their corresponding acyl chloride (1) in good yields.
Iranian Journal of Chemistry and Chemical Engineering
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
1021-9986
14
v.
1
no.
1995
32
35
https://ijcce.ac.ir/article_10165_13505262be4f0904a44b62810a2da697.pdf
dx.doi.org/10.30492/ijcce.1995.10165
The Effect of Organic Substituents on the Acceptor Properties of TIN (IV) Chlorides
Mozaffar
Asadi
Department of Chemistry, Faculty of Sciences, Shiraz University, Postcode 71454, Shiraz, I.R. IRAN
author
Gasi Abdul Wahab
Derwich
Department of Chemistry, Faculty of Sciences, Baghdad University, Baghdad, IRAQ
author
text
article
1995
eng
The equilibrium constant of adduct formation between some triorganotin chloride of the type R3SnCl (R=C6H5, p-CH3C6H4, n-CH3)CH2)3, C6H5-CH2 and Lewis bases Cl¯, Br¯, and I¯, were measured in 50% v/v ethanol-water solvent spectrophotometrically. The average equilibrium constant values for the systems studied shows the following acceptor trend of tin(IV) in the triorganotin chlorides: p-tolyl > n-butyl > Phenyl > benzyl The influence of the organic moieties on the acceptor property of tin(IV) is discussed..
Iranian Journal of Chemistry and Chemical Engineering
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
1021-9986
14
v.
1
no.
1995
36
40
https://ijcce.ac.ir/article_10166_9f89852cdb2ee92a7689d95203a7158b.pdf
dx.doi.org/10.30492/ijcce.1995.10166
Ring Transformation of Oxazolo [3,2-b][1,2,4] Triazines
Majid
M. Heravi
Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, P.O. Box 91735-654, Mashhad, I.R. IRAN
author
Mehdi
Bakavoli
Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, P.O. Box 91735-654, Mashhad, I.R. IRAN
author
Zohreh
Sadjadi Hashemi
Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, P.O. Box 91735-654, Mashhad, I.R. IRAN
author
text
article
1995
eng
6-Methyl-2-phenyl-7H-Oxazolo [3,2-b] [1,2,4] triazine (1) undersent ting transformation on treatment with ammonia and primary amines to afford the corresponding imidazol [1,2-b][1,2,4] triazine (2). Treatment of (1) with hydrazine hydrate gave the corresponding 3-aryl-4H-1,2,4- triazino [4,3-b][1,2,4] triazin-8 (1H)-one (3).
Iranian Journal of Chemistry and Chemical Engineering
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
1021-9986
14
v.
1
no.
1995
41
48
https://ijcce.ac.ir/article_10167_1bb9611f74cb8fe4187ed64731f206cd.pdf
dx.doi.org/10.30492/ijcce.1995.10167
The Conformations of 1-Thiacyclooctan-3-One Dynamic Nuclear Magnetic Resonance and Force-Field Calculation
Mehran
Ghiaci
Department of Chemistry, Isfahan University of Technology, Postcode 85156 Isfahan, I.R. IRAN
author
Ahmad Reza
Massah
Department of Chemistry, Isfahan University of Technology, Postcode 85156 Isfahan, I.R. IRAN
author
text
article
1995
eng
The 1H and natural-abundance 13C-NMR spectra of 1-thiacyclooctan-3-one (1) have been measured from 25 to -100°C. Coalescence is observed in the 1H-NMR spectra of (1) at about -80°C, and attributed to ring inversion in a boat-chair conformation, which is the predominant conformation of (1). The free energy of activation (DG¹) for this process is 9.2±0.2 kcal/mol. The 13C-NMR spectra of (1) is temperature independent.
Iranian Journal of Chemistry and Chemical Engineering
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
1021-9986
14
v.
1
no.
1995
49
54
https://ijcce.ac.ir/article_10168_3a68fed9b8f8a64ed3c37272e215397a.pdf
dx.doi.org/10.30492/ijcce.1995.10168