Journal Article 5 hyperconjugation natural bond orbital theory 2 18e rule 1 3c/4e omega-bonding 1 Diels-Alder reactivity 1 OH stretching frequency 1 mehr ... Research Support, Non-U.S. Gov't 1 aromaticity 1 bond critical point 1 chemical bonding 1 cycloaddition 1 density functional theory computations 1 dipolar interactions 1 fluorine Perlin-like effect 1 hexamethylbenzene 1 one-bond C─F coupling constant 1 organofluorine compounds 1 quantum theory of atoms in molecules theory 1 steric repulsion 1 substituted phenols 1 transition metal bonding 1 π-hydrogen bonding 1 weniger ...