置換 phenol類와 여러 有機溶媒間의 水素結合能力에 관한 硏究 (第Ⅰ報)
- 置換 phenol類와 여러 有機溶媒間의 水素結合能力에 관한 硏究 (第Ⅰ報)
- Other Titles
- Hydrogen Bonding Abilities of Substituted Phenols and Various Organic Solvents (Ⅰ)
- Issue Date
- No. 2
- 置換 phenol類와 여러 有機溶媒間의 分子間 水素結合을 I.R.로 硏究하였다. 이들 사이의 水素結合에 의하여 OH stretching band가 70∼570㎝＾-1 더 낮은 frequency로 이동하였다. Joesten과 Drago는 frequency shifts(Δν)로서 置換 phenol類와 鹽基들간의 enthalpy값을 구하는 일반식, -ΔΗ(㎉.mole＾-1)=0.016Δ_(ο-Η)+0.63,을 제안했는데, 이 식으로부터 水素結合 energy를 계산하였다. 또한, 置換基效果를 고찰하기 위해 frequence shifts를 Hammett-type式에 적용했는데 frequency shifts와 Hammentt 置換基常數(σ) 사이에는 직선관계가 成立함을 알았다.
The intermolecular hydrogen bond of substituted phenols and various organic solvents in carbon tetrachloride solution was quantitatively studied by use of infrared spectroscopy. The i.r. band shifting of OH stretching as much as 70∼570㎝＾-1 to lower frequency was attributed to hydrogen bonding of the complex. Joesten and Drago have proposed the following general equation for predicting enthalpy values for substituted phenols-base association from frequency shifts (Δν) data is -ΔΗ(㎉.mole＾-1)=0.016Δ_(ο-Η)+0.63. In this paper calculated enthalpy values from this equation. The Hammett-type equation was adopted for the correlation of the frequency shifts to substitutes effects. It was found that the frequency shifts of the hydroxyl stretching vibration has a linear relationship with the Hammett substituent constant(σ).
Files in This Item:
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.