Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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The Effect of Solvent Density on the Ethyl Acetoaceate Tautomerism

에틸 아세토아세테이트 토토머리즘 평형 상수의 밀도 의존성

  • Park, YoonKook (Department of Chemical System Engineering, Hongik University)
  • 박윤국 (홍익대학교 화학시스템공학과)
  • Received : 2006.03.30
  • Accepted : 2006.05.09
  • Published : 2006.06.10
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Abstract

The keto-enol tautomeric equilibrium constant, K, of ethyl acetoacetate in compressed and supercritical carbon dioxide was determined by using FT-IR (Fourier transform infrared) spectroscopy at three different temperatures. In order to investigate the effect of solvent density, the $CO_{2}$ pressure was systematically changed at a constant temperature. As the $CO_{2}$ density is increased, the amount of keto tautomer is increased, causing the K value to decrease. The modified lattice fluid hydrogen bonding theory has been applied to investigate the effect of density on the K.

본 연구에서는 아임계 및 초임계 이산화탄소하의 에틸 아세토아세테이트의 케토-에놀 토토머릭 평형상수를 후리에 적외선 분광기를 이용하여 세 가지 다른 온도에서 측정하였다. 케토-에놀 토토머릭 평형상수의 용매에 대한 밀도 의존성을 연구하기 위하여 정온하에서 이산화탄소의 압력을 변화시켰다. 용매인 이산화탄소의 밀도를 증가 시키면, 케토 토토머의 양이 증가하게 되어 케토-에놀 토토머릭 평형상수값이 감소한다. 에틸 아세토아세테이트의 케토-에놀 토토머릭 평형상수의 밀도의존성을 연구하기 위하여 변형된 격자유체수소결합 모델을 적용하였다.

Keywords

Acknowledgement

Supported by : 미국과학재단

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