ORIGINAL_ARTICLE
Preparation and NMR, Mass and Mössbauer Studies of Di-and Triorganotin (IV) Derivatives of 3-(2-Furanyl)-2- Propenoic Acid
3-(2-Furanyl)-2-propenoic acid has been used to prepare a new series of organotin complexes of general formula R3SnL (R=Me, Et, n-Bu, Ph and Cy) and R2SnL2 (R=Me and n-Bu). These complexes have been characterized by elemental analyses, IR, 1H-NMR, MASS and Mössbaure spectroscopy.
https://ijcce.ac.ir/article_10169_cb2fffbdd395e92d9426b758141390a5.pdf
1994-06-01
1
6
10.30492/ijcce.1994.10169
Spectral studies of organotin derivatives of 3-(2-furanyl)-2-propenoic acid
Badshah, A
Danish, M.
1
Department of Chemistry, Quaid-i-Azam University, Islamabad, PAKISTAN
AUTHOR
Saqib Ali
Mazhar, M.
2
Department of Chemistry, Quaid-i-Azam University, Islamabad, PAKISTAN
LEAD_AUTHOR
N.
Islam
3
Department of Pharmacy, University of Peshawar, PAKISTAN
AUTHOR
M.
Iqbal Chaudary
4
H.E.J. Research Institute of Chemistry, University of Karachi, PAKISTAN
AUTHOR
ORIGINAL_ARTICLE
Preparation and Molecular Structure of [CuCl(L)]6; L= 2-(Methylamino)Pyridine
The 2-(methylamino) pyridine, L, reacts with CuCl in THF to give hexameric copper (I) complex, [CuCl(L)]6. The molecular structure has been determined by using single-crystal X-ray diffraction method. The complex crustallizes in the monoclinic space group P21/n with four molecules per unit cell. The unit cell dimensions are a = 8.3495 (15), b = 15.622 (6), and c = 17.030(4) Å with b= 98.55 (2)°. The final R value is 0.062 for 4261 reflections measured. Coordination number around Cu(1) and Cu(3) is four (nearly tetrahedral), but around Cu(2) is three (nearly trigonal). The Cu(2)-Cu(3) bond distance is 2.682 (2)Å.
https://ijcce.ac.ir/article_10386_365875fc1264fa36e9d5ba5e4f313130.pdf
1994-06-01
7
12
10.30492/ijcce.1994.10386
Preparation
Molecular structure
[CuCl(L)]6
L= 2-(Methylamino) pyridine
Hossein
Aghabozorg
1
Department of Chemistry, Faculty of Science, Teacher Training University, P.O. Box 15614 Tehran, I.R. IRAN
LEAD_AUTHOR
Sandro
Gambarotta
2
Department of Chemistry, University of Ottawa, Ontario K1N 6N5, CANADA
AUTHOR
Corinne
Bensimon
3
Department of Chemistry, University of Ottawa, Ontario K1N 6N5, CANADA
AUTHOR
ORIGINAL_ARTICLE
Bromination and Dehydrobromination Studies on Some CIS-4a-Methyl-Decaline-2,7-Diones
Results of the bromination and dehydrobromination of several angular methylated decalindiones are described. The key reaction, base-induced cyclization of the monobromo keto ester (3), and the dibromo ketone (4), leads to the formation of tricyclic systems (6) and (9) respectively.
https://ijcce.ac.ir/article_10387_a4f6252d0025055ad1feff9ad9736ee7.pdf
1994-06-01
13
24
10.30492/ijcce.1994.10387
Cis-fused decalin
Favorskii
Intermediate
Dehydrohalogenation
Intramolecular cyclization
X-ray Analysis
Sasanin
Karimi
1
CUNY Graduate Center, Department of Chemistry, Hunter College, New York, N.Y. 10021, USA
LEAD_AUTHOR
K.
Grohamann
2
CUNY Graduate Center, Department of Chemistry, Hunter College, New York, N.Y. 10021, USA
AUTHOR
L.
Todaro
3
Research Division, Hoffimann-La Roche, Inc., Nutly, NJ 07110, USA
AUTHOR
ORIGINAL_ARTICLE
The Reactive Chemisorption of Carbon Dioxide at Mg(100) Surface
X-ray photoelectron and electron energy loss spectroscopic (XPS-EELS) studies reveal that the following species are present when a mixture of CO2 and water vapour is exposed to the clean Mg(100) surface at 110K: CO3(a), C(a) CH(a), OH(a). The reactive chemisorptions of CO2 and H2O vapour coadsorbed on a Mg surface leads to the formation of CH bond. Increasing the temperature to 400 K shows the peaks in the C(1s) region of the spectrum disappears suggesting the CH containing species are not stable at 400K.
https://ijcce.ac.ir/article_10389_67e700ab14273dded519af390942c9bf.pdf
1994-06-01
25
29
10.30492/ijcce.1994.10389
Coadsorption of CO2 + H2O
Dissociative chemisorptions
X-ray photoelectron spectroscopy
C-H formation
Carbonate species
Asghar
Zeini Isfahani
1
Department of Chemistry University of Isfahan, P.O. Box 81744 Isfahan, I.R. IRAN
LEAD_AUTHOR
M.W.
Roberts
2
School of Chemistry and Applied Chemistry University of Wales, CF1 3TB, Cardiff., England
AUTHOR
A.F.
Carley
3
School of Chemistry and Applied Chemistry University of Wales, CF1 3TB, Cardiff., England
AUTHOR
S.
Read
4
School of Chemistry and Applied Chemistry University of Wales, CF1 3TB, Cardiff., England
AUTHOR
ORIGINAL_ARTICLE
Raman Study of the Photochemistry of Maleic Acid Adsorbed on the Surface of Colloidal Silver
The surface-enhanced Raman scattering (SERS) spectra of maleic (cis; 2-butaneoic acid) and fumaric (trans; 2-butaneoic acid) acids adsorbed on aqueous silver sol particles are reported. These two acids form two groups of isomers which differ only in the relative positions of the two carboxylate groups. The photochemistry of maleic and fumaric acids adsorbed on the surface of silver colloids is investigated using SERS as a probe. The photochemical studies of these two acids adsorbed on colloidal silver surfaces show that the photoisomerization of maleic to fumaric acid has occurred. We interpret our spectra as indicating that fumaric acid p bounds through a C=C double bond, while maleic acid s bonds through lone pairs on the carboxylate groups.
https://ijcce.ac.ir/article_10390_a7817e46dead61ed68be11be6b183b21.pdf
1994-06-01
30
36
10.30492/ijcce.1994.10390
Raman
Photochemistry
Maleic acid
Adsorption
Colloidal silver
Jalal
Shakhse Emampour
1
Department of Chemistry, University of Mashhad, P.O. Box 91735-654 Mashhad, I.R. IRAN
LEAD_AUTHOR
Jung Sang
Suh
2
Department of Chemistry Education, Seoul National University, Seoul 151-742, and Center for Molecular Science, 373-1 Kusungdong, Taejon 305-710, KOREA
AUTHOR
Martin
Moskovits
3
Department of Chemistry and Ontario Laser and Lightwave Research Center, University of Toronto, Toronto, M5S 1A1, CANADA
AUTHOR
ORIGINAL_ARTICLE
Thermal Analysis of Adenosine Deaminase in the Presence of Sodium N-Dodecyl Sulphate
The thermal denaturation of adenosine deaminase (ADA) has been investigated in the presence of sodium n-dodecyl sulphate (SDS) over the temperature range of (293-363K) in 2.5 mM phosphate buffer, pH 6.4 by temperature scanning spectroscopy. The interaction of SDS caused the folding of adenosine deaminanse resulting in a decrease of TH (temperature of minimum solubility), TS (temperature of maximum stability), DHVH / DH293 (intermolecular force between hydrophobic parts of adenosine deaminase with water) and other corresponding thermodynamic parameters. The folding of adenosine deaminase by SDS, induced minimum solubility at lower temperatures indicating enhanced apolar interactions in the interior phase resulting in a lower value for TH. In contrast the interaction of ADA with dodecyl trimethylammonium bromide (DTAB) led to the unfolding of the enzyme and a higher value of TH.
https://ijcce.ac.ir/article_10391_ab64fe37392b1525060f3a715ab2d85f.pdf
1994-06-01
37
42
10.30492/ijcce.1994.10391
Adenosine deaminase
Sodium n-dodecyl sulphate
Thermal denaturation
Ali Akbar
Moosavi Movahedi
1
nstitute of Biochemistry and Biophysics, University of Tehran, P.O. Box 13145-1384 Tehran, I.R. IRAN
LEAD_AUTHOR
Hassan
Moghaddamnia
2
Institute of Biochemistry and Biophysics, University of Tehran, P.O. Box 13145-1384 Tehran, I.R. IRAN
AUTHOR
Gholam Hossein
Hakimelahi
3
Institute of Chemistry, Academia Sinica, Taipei, Taiwan 11529, Republic of CHINA
AUTHOR
ORIGINAL_ARTICLE
The Direct Electrochemical Investigation of Redox Enzymes
Even though the use of enzymes as useful analytical reagents when immobilized onto a transducer such as an electrochemical device has been reported in the literature for nearly two decades, the direct, i.e. unmediated electrochemistry of enzymes is, nevertheless, a rather recent development. Efforts will be made to introduce the fundamental basis for protein-surface interactions with emphasis on the powerful technique of cyclic voltammetry. The experimental schemes and ample examples as performed in our laboratory will also be presented to illustrate the kinetic and thermodynamic information acquired based on such enzymatic systems. It is believed that forther acquisition of knowledge in the field combined with findings from other complementary disciplines such as modeling and simulation, instrumental computerization and miniaturization, and on-line adaptability will ultimately pave the way toward the universal acceptance of biosensor and actuators for chemical analysis.
https://ijcce.ac.ir/article_10392_e22e26ed82fbbaccce6973720e5924a1.pdf
1994-06-01
43
58
10.30492/ijcce.1994.10392
Enzymes
Electrochemical
Protein
Cyclic voltammetry
Kinetics
M.D.(Davood)
Nabi Rahni
1
Pace University, Department of Chemistry, Pleasantvile, NY 10570-2799, U.S.A.
LEAD_AUTHOR
H.Allen O.
Hill
2
Inorganic Chemistry Laboratory, Molecular Sensor Unit, University of Oxford, South Parks Road, Oxford, OX1 3QR, U.K.
AUTHOR
ORIGINAL_ARTICLE
Preparation and Characterisation of Immunoadsorbents for High Performance Liquid Affinity Chromatography (HPLAC)
The efficacy of activation methods and coupling were studied in the context of performance in batch and fixed bed binding experiments utilizing cell culture fluids or blood plasma as feedstock. Conclusions were drawn regarding selection of solid phase according to pore size, rigidity, pH stability, Chemistry of derivation and activation, and gross concentration of immobilized ligand required for optimal performance in analytical and preparative fractionation of complex feedstreams.
https://ijcce.ac.ir/article_10393_4206b35e5f059889c669e8fca0fbb81d.pdf
1994-06-01
59
67
10.30492/ijcce.1994.10393
Immunoadsorbent
High Performance Liquid Affinity Chromatography (HPLAC)
Seyed Abbas
Shojaosadaty
1
Biotechnology Group, Department of Chemical Engineering, Tarbiat Modares University, P.O. Box 14155-4838 Tehran, I.R. IRAN
LEAD_AUTHOR
Andy
Lyddiatt
2
Department of Chemical Engineering, University of Birmingham, P.O. Box 363, Birmingham, B15 2TT, ENGLAND
AUTHOR