Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998612119930601Synthesis of 1-Hydroxy-2-(Prop-2'-Enyl) 9-Antrone171092610.30492/ijcce.1993.10926ENHashem SharghiDepartment of Chemistry, Shiraz University, Shiraz, I.R. IRANFatemeh TamaddonDepartment of Chemistry, Shiraz University, Shiraz, I.R. IRANRamin RezaieDepartment of Chemistry, Shiraz University, Shiraz, I.R. IRANJournal Article19920930<em>An efficient synthesis of the 1-hydroxy-2-(prop-2'-enyl)9-anthrone is described. Selective nitration of anthraquinone, reduction to the corresponding amine, diazotization and treatment by sulfuric acid solution afforded the 1-hydroxy-9,10-anthraquinone in good yield as the key intermediate. Reaction with allyl bromide/K<sub>2</sub>CO<sub>3</sub> and subsequent selective reduction accompanied by a Claisen rearrangement produced the title compound in high yield.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998612119930601Solvent Extraction Spectrophotometric Determination of Vanadium Using Sodium Salt of 2-Mercapto-Pyridine-N-Oxide as a Reagent8111092710.30492/ijcce.1993.10927ENAfsaneh SafaviDepartment of Chemistry, Faculty of Sciences, Shiraz University, Shiraz, I.R. IRANGholam Reza KhayatianDepartment of Chemistry, Faculty of Sciences, Shiraz University, Shiraz, I.R. IRANAli MassoumiDepartment of Chemistry, Faculty of Sciences, Shiraz University, Shiraz, I.R. IRANJournal Article19910419<em>A solvent-extraction spectrophotometric technique is proposed as a new method for determination of trace quantities of vanadium. Sodium salt of 2-mercapto-pyridine-N-oxide (thione) forms a complex with vanadium instantaneously. The purple 1:2 complex is formed of pH 2.3, easily extracted in chloroform and shows strong absorbance at 500 nm. The extracted complex is found to obey Beer's law in the concentration range of 0.3-18 </em><em>m</em><em>gmL<sup>-1</sup> vanadium. The molar absorptivity of vanadium thione complex is 2.63</em><em>´</em><em>10<sup>3</sup> L.mol<sup>-1</sup>.cm<sup>-1</sup> with a detection limit of 0.1 </em><em>m</em><em>gmL<sup>-1</sup>. The proposed method offers the advantage of sensitivity and relative freedom from interferences compared to the existing methods. This method is applied in the determination of vanadium in rutile.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998612119930601Thermodynamic Studies on the Interaction of Histone H2B with Dodecyl Trimethyl Ammonium Bromide12161092810.30492/ijcce.1993.10928ENAli Akbar Moosavi MovahediInstitute of Biochemistry and Biophysics, Tehran University, Tehran, I.R. IRANMohammad Morad FarajollahiInstitute of Biochemistry and Biophysics, Tehran University, Tehran, I.R. IRANJournal Article19920720<em>The interaction of histone H<sub>2</sub>B and dodecyl trimethyl ammonium bromide (DTAB) was studies via equilibrium dialysis method at two different temperatures, at pH 6.4 in phosphate buffer. The binding data were used to obtain the Gibbs free energy of interaction, which is interpreted in terms of a theoretical model based on the Wyman binding potential. The data were then used to obtain the enthalpy of interaction from the temperature dependence of the equilibrium constants by the van't Hoff relation, in order to get a better picture of the thermodynamics of the interaction. The enthalpy of unfolding is found to be consistent with Hill plots which are good estimation of the cooperativity of the system.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998612119930601Preparation of the Phencyclidine Analogues (Part II)17211092910.30492/ijcce.1993.10929ENMohammad Raouf DarvichDepartment of Chemistry, Faculty of Science, Tehran University, Tehran, I.R. IRANAfsaneh ZonooziDepartment of Chemistry, Faculty of Science, Tehran University, Tehran, I.R. IRANJournal Article19921104<em>Using </em><em>a</em><em>-tetralone, as starting material, a series of phencyclidine analogues were synthesized. This ketone was reacted separately with ethylmagnesium bromide, P-methoxyphenylmagnesium bromide and P-methylphenylmagnesium bromide. The resultant alcohols were treated with a suspension of NaN<sub>3</sub> and CCl<sub>3</sub>COOH in CHCl<sub>3</sub>. The azides were subsequently reduced with LiAlH<sub>4</sub> in dry ether to their primary amines. Cyclization of these amines with 1,5-dibromopentane and 1,4- dibromobutane gave tertiary amines.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998612119930601Behenic Acid Monolayer and Bilayer Assemblies- A Study of Concanavalin A (Con A) Adsorption and its Interaction with Dextran Using Surface Plasmon Resonance Spectroscopy and Microscopy22311093010.30492/ijcce.1993.10930ENGholam Hossein RounaghiDepartment of Chemistry, Faculty of Sciences, Ferdowsi University Mashhad, I.R. IRANU.J KrullChemical Sensor Group, Department of Chemistry, Erindale College, University of Toronto, Mississauga Road, Mississauga, Ontario, L5L 1C6, CANADAR.F. DebonoChemical Sensor Group, Department of Chemistry, Erindale College, University of Toronto, Mississauga Road, Mississauga, Ontario, L5L 1C6, CANADAJournal Article19920829<em>Deposition of behenic acid (B.A) mono and bilayers onto gold coated surfaces was performed by Langmuir-Blodget dip-casting technique. Surface Plasmon resonance (SPR) and ellipsometry methods were employed for investigation of the monolayer and bilayer films. The adsorption of the biologically important molecule Concanavalin A (Con A) from bulk solution to these monolayers and bilayers as well as the interaction between deposited Con A with dextran molecules in the presence of Ca<sup>2+</sup> and Mn<sup>2+</sup> ions was investigated. The results obtained, show that no significant interaction occurs between the adsorbed Con A and dextran in the case of B.A. bilayer, while a significant binding takes place in the monolayer.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998612119930601Chromium (VI) Based Oxidants IV, Zinc Chlorochromate Nonahydrate Zn(ClCrO3)2, 9H2O; as An Efficient and Mild Oxidizing Agent, Part 232381093210.30492/ijcce.1993.10932ENHabib FirouzabadiDepartment of Chemistry, Shiraz University, Shiraz, I.R. IRANAli SharifiDepartment of Chemistry, Shiraz University, Shiraz, I.R. IRANBabak KarimiDepartment of Chemistry, Shiraz University, Shiraz, I.R. IRANJournal Article19930309<em>Zinc chlorochromate nonahydrate is easily prepared from the aqueous solution of chromium trioxide and zinc chloride in quantitative yield. This oxidant, in methylene chloride and at room temperature, oxidizes thiols to their disulfides. Acetals and thioacetals are deprotected to their corresponding carbonyl compounds. Sulfides are selectively converted to ther sulfoxides or sulfones. Aryloxyranes undergo carbon-carbon bond cleavage and produce the corresponding aldehydes. Cyclohexane oxide yields 2-hydroxy cyclohexanone. Trimethylsilyl ethers are also deprotected and converted to the corresponding carbonyl compounds in high yields.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998612119930601Extraction of Traces of Copper as Tetra-Butylammonium Tetrathiocyanato Copper (II) and Its Spectrophotometric Determination Using Eriochrome Black T39441093310.30492/ijcce.1993.10933ENMojtaba ShamsipurDepartment of Chemistry, Shiraz University, Shiraz, I.R. IRANAli Reza FakhariDepartment of Chemistry, Shiraz University, Shiraz, I.R. IRANJournal Article19920704<em>An extraction-spectrophotometric method for the determination of traces of copper (II) is described. The method is based on the quantitative extraction of copper as tetrabutylammonium tetrathiocyanato copper (II) into methyl isobutyl ketone, followed by spectrophotometric determination, using eriochrome black T as a metallochromic indicator. The red-violet mixed complex of copper absorbs at </em><em>l</em><em><sub>max</sub></em><em> = 570 nm with a molar absorptivity of 4.4</em><em>´</em><em>10<sup>4</sup> Lmol<sup>-1</sup>cm<sup>-1</sup>. The sandell's sensitivity for 0.001 absorbance unit is 1.4 ngcm<sup>-2</sup>. The method is simple, sensitive and free of interferences from many anion and cations.</em>Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998612119930601Application of a Polymer-Bound Thiazolium Salt to the Synthesis of Alpha-Hydroxy Ketones with an Aromatic and Aliphatic Substituent (Bencyloins) [1]45481093410.30492/ijcce.1993.10934ENKhashayar KarimianLaboratory of Chemistry, ACIC, INC. Toronto, CANADAFarajollah MohanazadehDepartment of Chemistry, Mazandaran University, Babolsar, I.R. IRANJournal Article19921206<em>Alpha-Hydroxy ketones with an aromatic and aliphatic substituent were prepared with condensation of aromatic and aliphatic aldehydes in the presence of polymer-bound thiazolium salt.</em>