Linear free energy relationships (LFER) are associated with the dawn of physical organic chemistry in the late 1930s and its objectives in understanding chemical reactivity as measured by reaction rates and equilibria.
Posts Tagged ‘Hammett equation’
Free energy relationships and their linearity: a test example.
Sunday, January 13th, 2019Mesomeric resonance in substituted benzenes: a crystallographic reality check.
Wednesday, August 26th, 2015Previously, I showed how conjugation in dienes and diaryls can be visualised by inspecting bond lengths as a function of torsions. Here is another illustration, this time of the mesomeric resonance on a benzene ring induced by an electron donating substituent (an amino group) or an electron withdrawing substituent (cyano).