抄録
Taft and his co-workers proposed Linear Solvation Energy Relationships (LSER) parameters in order to quantify solvent effect: π* scale of solvent polarity, α scale of hydrogen-bond donor, and β scale of hydrogen-bond acceptor. A conventional method for evaluation of α, β, and π* scales was proposed based on spectroscopic measurements using solvatochromic indicators A, B and C. The LSER parameters of alcohols were evaluated and their relationships with the chemical structure were discussed. It was concluded that (1) π* scale is mainly controlled by the dipole-dipole interactions, (2) α scale depends mainly on the inductive effect of alkyl groups and (3) β scale is influenced by the steric effect around α-carbon.
