SEARCH Articles Figures Tables Allylic substitution transition states Electrophilic aromatic substitution reactions transition state modeling Electrophilic substitution, aromatic transition states Substitution reactions solvent-assisted transition state Transition state bimolecular nucleophilic substitution Transition state unimolecular nucleophilic substitution Transition states in nucleophilic substitution Transition states in substitution reactions Transition states nucleophilic substitution Transition states substitution reactions Transition states vinylic substitution Trigonal bipyramidal transition state in octahedral substitution reactions Trigonal bipyramidal transition state in square planar substitution reactions