置換 Phenol類와 여러 有機溶媒間의 水素結合能力에 관한 硏究(第Ⅱ報) = Hydrogen Bonding Abilities of Substituted Phenols and Various Organic Solvents(Ⅱ)

국문 초록 (Abstract)

置換 Phenol類와 여러 有機溶媒間의 分子間 水素結合을 I.R. 분광법을 이용하여 硏究하였다. 이들 사이는 水素結合에 의하여 OH stretching band가 180~360cm^(-1) 더 낮은 frequency로 이동하였다.
Joesten과 Drago는 frequency shifts (Δν)로서 置換 Phenol類와 염기들간의 enthalpy값을 구하는 일반식, -ΔH (kcal.mole^(-1))=0.016Δν_(O-H)+O.63,을 제안했는데, 이 식으로부터 水素結合 energy를 계산하였다. 또한, 置換基效果를 고찰하기 위해 frequency shifts를 Hammett-type式에 적용하여 frequency shifts와 Hammett 置換基常數(σ) 사이에는 직선관계가 成立함을 알았다.

다국어 초록 (Multilingual Abstract)

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 180~360cm^(-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 -ΔH (kcal.mole^(-1))=0.016Δν_(O-H)+O.63. In this paper calculated enthalpy values from this equation. The Hammett-type equation was adopted for the correlation of the frequency shifts to substituted effects. It was found that the frequency shifts of the hydroxyl stretching vibration has a linear relationship with the Hammett substituent constant(σ).