SEARCH Articles Figures Tables Angular group induced bond alternation - a new substituent effect detected by molecular geometry Determining the Directing Effects of a Substituent Effect of a Group Adjacent to an Ortho-Substituent Effect of a-Conjugated Substituents Effect of a-Methyl Substituents Effects of a Polar Substituent and Heteroatoms in the Ring Inductive effect as component of substituent effects Inductive effect of a substituent Resonance effect of a substituent Steric effects of a substituent