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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 30, Number 6
JKCSEZ 30(6)
December 20, 1986 

 
Title
Near-IR Spectroscopic Studies of the Hydrogen Bonding between Thioacetamide and N,N-Dimethylacetamide in CCl4

CCl4중에서 Thioacetamide와 N,N-Dimethylacetamide사이의 수소 결합에 관한 분광학적인 연구
Author
Kang Bong Lee, Byung-Chul Kim, Chang-ju Yun, O. D. Bonner, Young-Sang Choi

이강봉, 김병철, 윤창주, O. D. Bonner, 최영상
Keywords
Abstract
Thioacetamide(TA)-CCl4와 TA-N,N-dimethlylacetamide (DMA)-CCl4 용액에서 YA의 ν3 + Amide Ⅱ 조합띠의 근적외선 스펙트럼을 5∼55℃에서 얻었다. 삼성분계에서 이 조합띠는 단위체 TA, 1 : 1 TA-DMA complex and 1 : 2 TA-DMA 및 1 : 2 TA-DMA 성분으로 나타나지만, 묽은 용액에서는 단위체 TA와 1 : 1 복합체만이 나타나며 이를 컴퓨터를 사용해서 각 띠의 형태를 Lorentzian-Gaussian 곱의 함수로 보아 분리하였다. 농도 및 온도에 따른 스펙트럼을 분석하여 1 : 1복합체에 대한 평형상수와 열역학적 피라미터들을 구했으며, ΔH°는 -14.4 KJ mol-1 ΔS°는 -15.6 J mol-1 deg-1이었다.

Spectra for the ν3 + Amide Ⅱ combination band of thioacetamide(TA) were obtained in carbon tetrachloride solutions and in very dilute solutions of TA-N,N-dimethlylacetamide (DMA) in carbon tetrachloride in the range of 5∼55℃. The combination band in the three component system can be resolved into components due to monomeric TA, 1 : 1 TA-DMA complex and 1 : 2 TA-DMA complex. In the dilute solutions the experimental spectrum was resolved by using the computer into its two Lorentzian-Gaussian product components which have been identified with the monomeric TA and the 1 : 1 complex. The equilibrium constants and thermodynamic parameters of 1 : 1 complex were determined by analysis of concentration and temperature dependent spectra. The ΔH° and ΔS° for the 1 : 1 complex were -14.4 KJ mol-1 and -15.6 J mol-1 deg-1, respectively.

Page
510 - 515
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