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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Chemical Society
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Journal DOI :
Korean Chemical Society
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Volume & Issues
Volume 11, Issue 4 - Dec 1967
Volume 11, Issue 3 - Sep 1967
Volume 11, Issue 2 - Jun 1967
Volume 11, Issue 1 - Mar 1967
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Charge Transfer Complex Formation of Amines with Organic Halides (I)
Kim, Yoo-Sun ; Oh, Jung-Hee ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 121~125
The formation of a charge transfer complex between various amines and organic halogen compounds was closely investigated. A mixture of amine (piperidine, pyridine, diethylamine, ethylamine, triethylamine and triethanolamine) and organic halides(carbon tetrachloride and chloroform) was checked for its UV absorption spectrum in presence of n-hexane solvent. A red shift was observed. The formation of charge transfer complex was observed in the case of triethylamine and diethylamine, whereas the formation of contact complex was distinct in case of piperidine. The relation between the nucleophilicity of amines and their tendency of forming charge transfer complex was discussed.
Charge-Transfer Complex Formation of Amines with Organic Halides (II) Complex Forming Tendency by Various Electron Acceptors
Kim, Yoo-Sun ; Oh, Jung-Hee ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 126~131
Various amines (Triethylamine, Diethylamine, Dimethylaniline, Pyridine and Diphenylamine) and electron acceptors (Carbontetrachloride, iodine monochloride and iodine) were reacted in the hexane solvent system to form a charge transfer complex in each case. The tendency of forming a charge transfer complex by these electron acceptors was proportional to the basicity of amines and the different type of complex was formed as the polarity of electron donor had markedly changed, which were identified by ultraviolet spectrophotometry. A correlation between the formation of complex and the basicity of amine and the polarity of electron acceptor was discussed.
Spectrophotometric Determination of Impurities such as Iron and Copper in High Purity of Antimony with 8-Hydroxy-quinoline
Park, Kyu-Chang ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 132~137
A spectrophotometric method for the determination of major impurities, such as iron and copper, in high purity of antimony with 8-hydroxyquinoline (oxine) has been studied. The iron-oxinate is stable at the pH range 5.0 to 5.7, and the copper-oxinate at the pH range 3.5 to 4.0. To mask antimony in sulfuric acid solution of sample, author has investigated the effect of tartaric acid on antimony, and found that 10ml of 0.5M tartaric acid solution could mask up to 600mg of antimony. The absorbance of iron-oxinate was measured at 580
and iron could be determined, but it is necessary for copper-oxinate to measure at 410 and 580m respectively after removing heavy metals other than copper by back extraction with 15% solution of sodium hydroxide, and copper could be determined by making a correction for the amounts of iron present. Up to 150
of iron (0.005-0.03%), and 100
of copper (0.005-0.016%), in 500mg of antimony could be determined.
Evaluation of Reaction Velocity by Polarography and Studies on Simple Velocity Equation
Whang, Jung-Ui ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 138~142
The electrode reduction velocities of Zn, Ni and Co ions at DME in various supporting electrolytes and temperatures were measured by Randles' method. The values for Zn ions agreed with Randles' values within 20%. As mentioned in the auther's previous paper, the observed values of Ni and Co ions were considered to be reasonable. In the present work the curves log y vs. log z for the various metals in the range of 20~35
Transient State Theory of Significant Liquid Structure Applied to A Binary Mixture of Benzene and Carbon Tetrachloride
Choi, Dong-Sik ; Ahn, Woon-Sun ; Kim, Kak-Choong ; Chang, Sei-Hun ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 143~149
The Transient State Theory of Significant Liquid Structure is applied to a binary liquid solution of benzene and carbon tetrachloride, which gives slightly positive deviation from Raoults law. The partition function for the solution is derived according to the proposed theory. The various thermodynamic properties such as total and partial vapor pressures, molar volumes, entropies of mixing, and compressibilities are calculated at three different temperatures, 298.15
. The calculated values agree satisfactorily with experimental data.
A Study of the Formation of Carbon Monoxide in the Combustion of Anthracite Holed Briquettes
Han, Dong-Chin ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 150~158
When anthracite burns by natural draft the mole percent of carbon monoxide (CO%) contained in exhaust gas is approximately expressed as follows in the early stage of combustion. (CO%)=
are the rate constant for the reaction (
), mole fraction of oxygen and oxides of carbon contained in the exhaust gas, respectively. From experimental evidence obtained in this work with natural draft combustion of briquettes the percent of carbon monoxide to the total quantity of oxides of carbon produced and rate of air flow into the furnace were: 1.76% and 0.53 l/sec (When lid is used in the furnace) 12.35% and 2.4 l/sec (without use of a lid). is the rate constant for the reaction(
are respectively the molefraction of oxygen and oxide of carbon contained in the exhaust gas.
Oxidation-Reduction Titration Curve Both Half Reactions Homogeneous in Coefficient
Choi, Q-Won ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 159~164
An exact expression of the titration fraction as a function of the potential is derived for the cases where the coefficients of the both half reactions involved in the titration are homogeneous. It shows that the potential is independent of the concentration of the reagents not only at the equivalence point but also at all titration fractions. The sharpness of the end point detection by potentiometric method is shown to depend not only on the difference of the normal potentials involved but also strongly on the number of electrons transferred in each half reaction. The inflexion point of the potentiometric titration curve is shown to be slightly off from the equivalence point, including the cases where the number of electrons involved are equal. Completeness of the reaction in the course of titration is analyzed, too, mostly in terms of equilibrium constant, thus most of the results are applicable to any type of equilibrium in a single phase with particular relationship of coefficients of chemical equation.
Untersuchungen Zur Herstellung Von Neun Messpraparaten Fur Die Rontgenfluoreszenzspektrometrie
Park, Yung-Kyu ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 165~169
Eine neue Methode zur Herstellung von Meßpraparation wird die Bestimmng der Spurenelemente Quecksilber, Kupfer, Blei, Zink, Nickel, Kobalt und Eisen durch Rontgenflureszenzspektrometrie entwickelt. Die Spurenelemente werden aus waßrigen Losungen durch Einleitung von Schwefelwasserstoff mit Aluminiumsulfat als Trager bei pH8 ausgefallt. Die Niederschlage der Metallsulfide werden uber Membranfilter filtriert, mit Gelatine fixiert und ihre Absolutmengen durch Rontgenfluoreszenz analyse bestimmt. Bei der geringen Dicke der auszumessenden Schichten treten Matrixeffekte nicht auf. Durch den Zusatz von Aluminiumsulfat-Trager wird eine gute Reproduzierbarkeit erzielt: Quecksilber, Kupfer, Blei, Zink, Nickel und Kobalt werden bei einer Konzentration von 50 bis 1000 p.p.b. mit einer relativen Standard-abweichung von 5.0% und Eisen bei einer Konzentration von 50∼1000 p.p.d. mit einer relativen Standardabweichung von 6.1% gemessen.
Effect of Substituents on the Formation of 2-Substituted Phenyl-5-phenyltetrazole
Hong, Soon-Yong ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 170~172
2-Phenyl-5-substituted phenyltetrazole and 2-substituted phenyl-5-phenyltetrazole were prepared from the corresponding hydrazone and phenyl azide with 2-methoxyethanol and metallic sodium as reaction medium at 110~115
. At this reaction condition, however, the preparation of 2-substituted phenyl-5-phenyltetrazoles with substituents of relatively high Hammett substituent constant was unsuccessful. Surprisingly it was found that the solvent molecule was exchanged with substituent during the reaction when tried to obtain 2-m-fluorophenyl-5-phenyltetrazole using benzaldehyde m-fluorophenylhydrazone as starting material. Also disscussed the effect of electronic nature of substituents on the formation of 2,5-diphenyltetrazole derivatives.
Kinetics of the Rearrangement of
-4-Nitroazoxybenzene in Strongly Acidic Solution
Han, Chi-Sun ; Lee, Kwi-Ja ; Nam Goong, Ha-Il ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 173~178
The rearrangement of
-4-nitroazoxybenzene into 4-hydroxy-4'-nitroazobenzene in strongly acidic solutions has been as certained by UV spectrophotometry. The kinetics of the rearrangement in 20 vol. % ethanol and 80 vol. % of aqueous sulfuric acid-water solutions has been studied, and the rearrangement was found to be acid catalyzed pseudo-frst-order reaction. The mechanism of the rearrangement is also discussed.
Study on Anomalous Polarographic Behavior of Cd (II) in Tartrate Solution
Koh, Kwang-Ho ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 179~184
The polarograms of Cd(II) in 0.15M tartrate solution were investigated in the range of pH values from 6.0 to 12.6 at 20
. Up to pH value of 7.8, the limiting current and the halfwave potential were found to be constant, and when compared with the nitrate solution of the same
concentration at the same ionic strength, the limiting current decreased by 28% and the halfwave potential shifted by -0.05 volt. The values of limiting current sharply decreased as the pH value exceeded 8.2 and the minimum values appeared at the pH values of 11.2~11.4. The values of halfwave potential gradually decreased as the pH value increased over 8.2 and the value of -0.78 volt was obtained at the pH value of 12.6. Possible mechanisms of electrode reaction were suggested and the anomalous behavior of reduction waves of Cd(II) in tartrate solution up to pH value of 9.4 was discussed.
炭化水素內에서의 Alkyl Iodides 의 光分解에서
과 Alkyl Iodides 間의 交換反應
Choi, Jae-Ho ;
Journal of the Korean Chemical Society, volume 11, issue 4, 1967, Pages 185~186