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KMID : 1059519860300060510
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Journal of the Korean Chemical Society
1986 Volume.30 No. 6 p.510 ~ p.515
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Near-IR Spectroscopic Studies of the Hydrogen Bonding between Thioacetamide and N,N-Dimethylacetamide in CCl4
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Lee Kang-Bong
Kim Byung-Chul
Yoon Chang-Ju
Choi Young-Sang
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Abstract
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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.
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