서울特別市 一圓의 漢江의 汚染度에 關한 調査硏究

李根楔 상명대학교 논문집 1975 상명대학교논문집 Vol.4 No.-

The pollutable source from the tributary Han River and polluted of the main fiver has been Potable water source for Seoul City are investigated September, 1974 to March, 1975. As the result of this surver the following Conclusions are obtained; The maximum and minimum values(in unit ppm)of BOD are obtined respectively as following:2.5 and 1.0 at Kwang Jang site 2.7 and 1.5 at Jung Gi Do site, 13.7 and 6.2 at Bo Kwang Dong site, 10.3 and 5.4 at No Ryang Jin site, 13.8 and 9.8 Mapo site. The highest lovel of the BOD values are shown during the dry season, form November to January 1975. In tributary river the highest level of the BOD values is shown in Cheong Ge cheon, 301.4ppm, and the lowest levl in Tan chun, 44.2 p.p.m.

1-(Methylthio) Vinyllithium을 이용한 1,4-dicarbonyl 화합물의 합성

이근설,박진숙 상명대학교 기초과학연구소 1991 기초과학연구 Vol.5 No.-

1,4-디카르보닐 화합물을 합성하기 위한 새로운 컨쥬게이트 첨가/알킬화 방법이 발표되었다. 현 실험에선 초기 물질로 sulfide을 사용하였따. α-phosphoryl methyl sulfide를 aldehyde 와 반응시키면 vinyl sulfides로 전환된다. Diethyl[ (methyl (aryl) thio) methyl] phosphonates는 triethyl phosphite와 chloromethyl(aryl)sulfide을 Arbuzou 반응법으로 제조한것이다. diorganocuprate는 순수한 cuprous iodide와 vinyl sulfide을 반응시켜서 얻는다. 계속적으로 중간체인 α, β-불포화 sulfide 축합 반응물질을 가수분해시켜서 최종 생산물인 1,4-dione을 얻는다. 1H-NHR 스펙트라로 1,4-dione을 확인함으로 이 방법을 증명하였다. To synthesize 1,4 - dicarbonyl compound a new conjugate addition/ alkylation method was reported. In the present experiments sulfide was used as a starting agent. a- phosphoryl methyl sulfide with aldehyde are converted into vinyl sulfides. Diethyl C [(methyl(aryl) thio)methyl] phosphonates which prepared by Arbuzov reaction of triethyl phosphite with chloromethyl (aryl) sulfide. The diorganocuprate was obtained by treatment of purified cuprous iodide with vinyl sulfide. Subsequent hydrolysis of the intermediate α, β- unsaturated sulfidecondensation product affords the desired 1,4 - dione end product. This method was proved to give 1,4 - dione by means of examination of H-NMR spectra.

[特輯]企業에서 바라는 電算敎育의 方向

이근설 한국정보과학회 1983 정보과학회지 Vol.1 No.2

클로로필의 에너지전이에 미치는 용매의 영향

李根楔,朴冕用 상명대학교 기초과학연구소 1987 기초과학연구 Vol.1 No.-

Absorption and fluorescence spectra of chlorophyll -a and -b in twenty- four solvent of different dielectric constant have been measured. The solvent - depend of absorption and emission wavelength maxima was discussed to solvent polarization and ionization potential by least square fitting method.

디에틸에테르 중에서 사브롬화탄소에 의한 클로로필의 에너지�칭

李根楔 상명대학교 논문집 1984 상명대학교논문집 Vol.13 No.-

The chlorophyll-a and chlorophyll-b have been separated from the spinach leaves through the sugar-packed column by using of the mixed solvents of petroleum ether, dioxane and n-propyl alcohol. The energy quenching constants of chlorophyll-a and chlorophyll-b by carbontetrabromide as a quencher were measured in the solvent of diethl ether by spectrofluorometry, and its constants of chlorophyll-a and chlorophyll-b were 3.2 and 0.75 respecturely.

카르보닐화합물에 대한 유기티타늄화합물의 화학선택성에 대한 연구

이근설,김희정 상명대학교 기초과학연구소 1992 기초과학연구 Vol.6 No.-

카르보음이온 화학은 탄소-탄소 결합을 형성하는 유기합성분야에서 가장 중요한 부분중의 하나이다. 고전적인 카르보음이온, 예를 들어 알킬리튬 또는 Grignard 시약은 카르보닐화합물에 대해 높은 반응성을 나타내는 반면 낮은 선택성을 갖는다. 반면에 RTiX3로 표현되는 유기티타늄 화합물은 카르보닐 화합물에 대해 화학적이고 입체적인 선택성이 높은 것으로 알려졌다. 본 연구에서는 trichlorophenyltitanium을 합성하여 이것의 카르보닐 화합물에 대한 반응성을 본 결과 다른 유기티타늄 화합물과 같이 알데히드 화합물에 선택적인 반응성을 나타내는 것을 알 수 있었다. Carbanion chemistry is one of the most important field in organic synthesis, expecially for the formation of C-C bond. Though the classical carbanions, for example alkyllithium or Grignard reagent, show high reactivity for the carbonyl compounds, but they react with low selectivity. On the other hand, it is well known that organotitanium compounds generally expressed as RTiX₃(R=methyl, allyl) have high chemo-and stereoselectivity. In this study trichlorophenyltitanium was prepared in situ from phenyllithium and titaniumtetrachloride and was added to carbonyl compounds in order to investigate its reactivity. As a result this reagent was proved to have the same aldehyde reactivity as the other organotitanium compounds.

2-(N, N- dimethylamino) phenyl triisopropoxy titanium 화합물의 카르보닐 화합물에 대한 첨가 반응 연구

이근설,김희정 상명대학교 기초과학연구소 1992 기초과학연구 Vol.7 No.-

카르보음이온 화학은 탄소-탄소 결합을 형성하는 유기합성분야에서 가장 중요한 부분중의 하나이다. 고전적인 카르보음이온, 예를들어 알킬리튬 또는 Grignard시약은 카르보닐 화합물에 대해 높은 반응성을 나타내는 반면 낮은 선택성을 갖는다. 반면에 RTiX₃(R=methyl, allyl)로 표현되는 유기티타늄 화합물은 카르보닐 화합물에 대해 화학적이고 입체적인 선택성이 높은 것으로 알려졌다. 본 연구에서는 2-(N, N-dimethylamino phenyl) triisopropoxy titanium을 합성하여 이것의 카르보닐 화합물에 대한 반응성을 본 결과 다른 유기티타늄 화합물과 같이 알데히드 화합물에 선택적인 반응성을 나타내는 것을 알수있었다. Carbanion chemistry is one of the most important field in organic synthesis, expecially for the formation of C-C bond. Though the classical carbanions, for example alkyllithium or Grignard reagent, Show high reactivity for the carbonyl compounds, but they react with low selectivity. On the other hand, it is well known that organotitanium compounds generally expressed as RTiX₃(R=methyl, allyl) have high chemo-and stereoselectivity. In this study 2-(N, N-dimethylamino phenyl) triisopropoxy titanium was prepared in situ from 2-(N, N-dimethylamino) phenyllithium and chloridetriisopropoxytitanium and was added to carbonyl compounds in order to investigate its reactivity. As a result this reagent was proved to have the same aldehyde reactivity as the other organotitanium compounds.

전이금속 착화합물의 31P NMR 연구

이근설,김희정,황영애 상명대학교 기초과학연구소 1997 기초과학연구 Vol.10 No.-

전이금속 원소에 배위된 포스핀 착화합물의 31P NMR 스펙트라를 이용하여, 인의 화학적 이동, δ31P과 짝지음상수, JM-P와 JP-P가 착화합물에서의 금속의 산화수, 금속의 염기도, 배위수, 포스핀 리간드의 치환체의 전기 음성도 및 입체적 크기, 한자리 및 여러자리 리간드로 작용하는 포스핀 리간드와 포스핀 외에 배위된 다른 리간드에 따라 어떤 영향을 받는가에 대한 연구가 진행되었다. ^{31}P NMR spectroscopy of the transition metal-phosphine complexes has been studied to investigate the dependence of chemical shift of phosphorus nucleus, δ^{31}P, and the coupling constants, J_{M-P} and J_{p}-P, on the oxidation state and basicitiy of the metals and on coordination numbers, the electronegativity and bulkiness of phosphine ligands, monodenatate and polydentate phosphine ligands and other ligands.

「망개나무 열매 껍질에 含有된 Anthocyanin 色素」에 關한 硏究

李根楔 상명대학교 논문집 1981 상명대학교논문집 Vol.9 No.-

The red pigments of anthocyanin in Seed Peel of Smilax Chima Linne were identified by Spectrophotometry and studied it for the applicable possibilities. The absorbance of the pigments has a tendency to increase in the acidic solution and decreased gradually on the heating time at 70℃. The anthocyanins were formed stable red complex compound with the tin(Ⅱ,Ⅳ)and aluminum(Ⅲ). Two derivatives of anthocyanin, Cyanidin­3­mono­glucoside, and Leuco­ anthocyanin were intentified by the paper Chormatography, metal chelation and infrared spectroscopy.

인삼 사포닌과 그 분획물이 유기산의 산화에 미치는 영향에 관한 연구

李根楔 상명대학교 논문집 1982 상명대학교논문집 Vol.10 No.-

The antioxygenic effect of chloroform­methanol extract(2:1, v/v)and each fraction of chloroform­methanol extract fractionated by preparative thin layer chromatography of pauax ginseng roots on autoxidation of oleic acid have been observed is vitro. All of each sample have been antioxygenic function and have constrained the formation of hydroperoxides on autoxidation of oleic acid. In the each fraction of chloroform­methanol, the fraction having larger Rf value showed stronger antioxygenic activity to the subserate. The sequence of intensity of each frartion is as following;Fr5>Fr₄>Fr₃>Fr₁>and Fr₂