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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Chemical Society
Journal Basic Information
Journal DOI :
Korean Chemical Society
Editor in Chief :
Volume & Issues
Volume 14, Issue 4 - Dec 1970
Volume 14, Issue 3 - Sep 1970
Volume 14, Issue 2 - Jun 1970
Volume 14, Issue 1 - Mar 1970
Selecting the target year
Halogen Containing Heterocyclic Compounds (Part III) Chlorination of Furfuryl Acetate in Presence of Acid and Lewis Acids
Kim, You-Sun ; Lee, Soo-Sun ; Oh, Myung-Won ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 201~206
Furfuryl acetate was chlorinated in presence of acetic acid using carbontetrachloride as the solvent. When the chlorination proceeded at the low concentration of acetic acid, the formation of the tetrachloride was more efficient than that of higher concentration. The chlorination done in presence of various Lewis acids such as aluminum chloride, hydrogen fluoride, and borontrifluoride could not give high yield of tetrachloride, but trichloride. In case of borontrifluoride and hydrogen fluoride, the decomposition of the reaction mixture was apparent. The results were discussed in terms of the stability of furfuryl nucleus towards an electron acceptor and the convenient procedure of preparing trichloro furfuryl acetate was described.
Synthesis of 2,6-dichloro-4-Nitro Aniline Mercuric Acetate and Its Pharmaceutical Effects
Cho, Chul-Hyung ; Shin, Sung-Euy ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 207~212
A large variety of weed killers, insecticides, and bactericiedes on the market today are of almost infinite variety, but their pharmacological effects are different from each other according to the objects to cope with. Therefore, it is hoped that some chemical substance which serves as weed killer, an insecticide, and a bactericede at a same time, should be synthesized, in order to save expense and labor. I anticipated that the desire would be met by introducing to a molecule the radical which has the three effects. Here, I made an attempt of introducing
gas to aniline considering the following respects: 1. Introduction velocity of
gas under the varied temeratures and velocities of
gas 2. The effect of reaction period under the condition which gives the most satisfactory yield. 3. The actions of catalysts,
, and their proportions when a mixture of the three catalysts is used in producing 2,6-dichloro-aniline. After consideration of above phenomena, the maximum production rate of 79.5% of 2.6-compound was obtained. With the compound I synthesized 2.6-dichloro-4-nitroaniline-mercuric acetate. Investigations of the effects of the compound as weed killer, an insecticide, and a bactericide showed that the compound, 2,6-dichloro-4-Nitro Aniline mercuric acetate has a satisfactory herbi-insecti-bactericidal effect.
Polarographic Studies on the Kinetics of Cu(II)-thiocyanate and the Adsorption Wave of Cu(I)-thiocyanate
Hwang, Jung-Euy ; Chung, Chong-Jae ; Son, Moo-Young ; Park, Yu-Chul ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 213~219
In the presence of hydrogen peroxide, the effects of temperature and pH to the catalytic reaction velocity of cupric -thiocyanate and the quantities of reduction products adsorbed on the D.M.E. have been studied by polarographic method. According to these experiments, the following empirical equation has been derived for the relation among temperature
, concentration of hydrogen ion
and adsorbed cuprous-thiocyanate in moles/
, and rate constant log
where, A,B,C,D and
are constants. The Calculated values by both equations are well agreed with empirical values within 8% in the error.
Formation of a complex between furfuryl derivatives and halides
Kim, You-Sun ; O, Myeong-Won ; Do, Jae-Beom ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 221~228
The tendency of forming a charge transfer complex between furfuryl derivatives (2-methyl furan, furfuryl acetate, and Ethyl 2-furoate) and halides(Iodine, Iodine monochloride, and Trichloro bromo methane) was studied by means of ultra violet spectrophotometry. In case of furfuryl acetate the formation of the complex could not be distinctly detected by this method. Iodine and trichloro bromo methane could show a distinct formation of charge transfer complex in the U.V. region, whereas iodine monochloride shows a possibility of forming an addition compound rather than the charge transfer complex itself. The results were discussed in conjunction with the stability of the furfuryl ring.
A Study on the Electrodepositic Preparation of Lead Peroxide Anode
Nam, Chong-Woo ; Kim, Hark-Joon ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 229~235
Electrodeposition of lead peroxide on the graphite core was studied. The results are following; 1) At more noble potential than 1.6V vs. S.C.E. and lower temperature than
deposited current efficiency is increased but deposited layer falls off easily from graphite core. 2) Oxygen overvoltage of
deposited layer on the graphite core is largely with increasing
depositing anodic potential and with lowlying electrolytic temperature. 3) To obtain the
deposited layer without falling off from the graphite core, it is necessary to change the electrolytic conditions, anodic potential and electrolytic temperature, in four stages successively.
Effect of Additives on Gamma Radiolysis of Methanol
Choi, Sang-Up ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 237~242
Effect of Added 1-hexene on the yield of hydrogen produced from Co-60 gamma radiolysis of methanol was investigated at room temperature. The results indicated that the yield of hydrogen decreased rapidly with increasing 1-hexene concentrations. Effect of added methyl borate on the radiolysis of methanol was also studied in the presence of oxygen. The results revealved that methyl borate acted as a less effective scavenger than oxygen towards the precursors of the radiolysis products. Experimental data previously obtained on the systems with oxygen added were treated more quantitatively to re-examine mechanism of the radiolysis of methanol in detail.
Geochemical Investigation in Contaminated River Waters(Part III) Bromine Contents of River Water in Seoul
Lee, Yong-Keun ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 243~256
Halogen contents of the river water of Seoul city and of municipal reservoirs were investigated from June in 1969 to February in 1970. Bromine contents were ranging from 0.006 to 0.048 mg/1 of the reservoirs, 0.021 to 0.048 mg/1 of Han River, 0.051 to 0.540 mg/1 of rivers running through residential areas and 0.083 to 0.920 mg/1 of rivers running through industrial areas. Bromine contents increased as the river water became contaminated. Most of Br/Cl of Han River and the reservoirs were higher than
of sea water. Bromine contents at 17 different places were the largest in November. The contents of chlorine, iodine and COD (chemical oxygen demand) were nearly correlated with that of bromine. Bromine contents of the river waters in Seoul chiefly originated from consumption of domestic and industrial salt.
Study on the Several Factors in the Fractional Leaching Method of Mixed Hydrated Oxides of Monazite Sand
Rhee, Chin-Taik ; Ko, Hyo-Tae ; Chun, Sang-Moon ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 257~261
Some factors such as the weight ratio, reaction time and temperature for the separation of rare earth elements from monazite are studied. The influence of the inorganic phosphate for the leaching is also studied.
Surface Tension of Molten Salts and Strong Electrolyte Solutions
Paek, Woo-Hyun ; Sung, Yong-Kil ; Jhon, Mu-Shik ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 263~269
A theory of surface tension developed by using the approximation that the surface of liquids consists of a monomolecular layer has been applied to the molten salts (NaCl, KCl, NaBr, KBr) and the strong electrolyte solutions. By considering that the ionic forces are the long-range forces and with the use of the partition functions developed, the surface tension of molten salts and strong electrolyte solutions has been calculated. The results show good agreement between theory and experiment at various temperatures and over a wide concentration ranges (0.1-4.0m)
Kinetics and Mechanism of 1,3-Cycloaddition of 188.8.131.52-Tetrachlorobenzene-2-Diazo-1-Oxide
Hong, Soon-Yung ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 271~275
The effect of dimethyl maleate on the rate of thermolysis of 3,4,5,6-Tetrachlorobenzene-2-Diazo-1-Oxide in 1-chloronaphthalene at
was investigated: In a separate experiment, the effect of dimethyl fumarate upon the same reaction at the same temperature was investigated. The rate of thermolysis was decreased by dimethyl maleate, while dimethyl fumarate accelerated the reaction. Some kinetic parameters of the thermolysis of 3,4,5,6-Tetrachlorobenzene-2-Diazo-1-Oxide were calculated. A mechanism of isomerization of dimethyl maleate to dimethyl fumarate by 3,4,5,6-Tetrachlorobenzene-2-Diazo-1-Oxide was proposed.
지이오갈피 (Acanthopanax Chiinensis) 의 성분연구(I) Sesamin의 분리와 확인
Jang, Se-Hui ;
Journal of the Korean Chemical Society, volume 14, issue 3, 1970, Pages 277~279