title: In pursuit of negative Fukui functions: examples where the highest occupied molecular orbital fails to dominate the chemical reactivity.
abstract: In our quest to explore molecules with chemically significant regions where the Fukui function is negative, we explored reactions where the frontier orbital that indicates the sites for electrophilic attack is not the highest occupied molecular orbital. The highest occupied molecular orbital (HOMO) controls the location of the regions where the Fukui function is negative, supporting the postulate that negative values of the Fukui function are associated with orbital relaxation effects and nodal surfaces of the frontier orbitals. Significant negative values for the condensed Fukui function, however, were not observed.
authors.affiliation: Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario, Canada.
authors.forename: Eleonora
authors.initials: E
authors.lastname: Echegaray
authors.forename: Carlos
authors.initials: C
authors.lastname: Cárdenas
authors.forename: Sandra
authors.initials: S
authors.lastname: Rabi
authors.forename: Nataly
authors.initials: N
authors.lastname: Rabi
authors.forename: Sungmin
authors.initials: S
authors.lastname: Lee
authors.forename: Farnaz Heidar
authors.initials: FH
authors.lastname: Zadeh
authors.forename: Alejandro
authors.initials: A
authors.lastname: Toro-Labbe
authors.forename: James S M
authors.initials: JS
authors.lastname: Anderson
authors.forename: Paul W
authors.initials: PW
authors.lastname: Ayers
mesh_terms: D004583:Electrons; D019791:Guanidine / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D010084:Oxidation-Reduction
chemical_list: D019791:Guanidine