title: Theoretical investigation into the structural, thermochemical, and electronic properties of the decathio[10]circulene.
abstract: For the first time, a theoretical study has been performed on the prototypical decathio[10]circulene (C(20)S(10)) species, which is an analogue of the novel octathio[8]circulene "Sulflower" molecule (C(16)S(8)). Examinations of the singlet and triplet states of C(20)S(10) were made at the B3LYP/6-311G(d) level. Local minima of C(2) and C(s) symmetry were found for the lowest singlet and triplet states, respectively. The stability of C(20)S(10) was assessed by calculating the ΔH°(f) of C(16)S(8) and C(20)S(10) and the ΔH(o) for their decomposition into C(2)S units. Frontier molecular orbital plots show that structural adjacent steric factors along with the twist and strain orientations of C(20)S(10) do not disturb the aromatic π-delocalizing effects. In fact, C(20)S(10) maintains the same p(z) HOMO character as C(16)S(8). These similarities are further verified by density-of-states characterization. Calculated infrared spectra of C(16)S(8) and C(20)S(10) show broad similarities. Molecular electrostatic potential results reveal that eight of the peripheral sulfur atoms are the most electronegative atoms in the molecule, while the interior ten-membered ring exhibits virtually no electronegativity.
authors.affiliation: Department of Physics, Atmospheric Sciences and Geoscience, Jackson State University, 1400 J. R. Lynch Street, P.O. Box 17660, Jackson, Mississippi 39217, USA.
authors.forename: Brian
authors.initials: B
authors.lastname: Napolion
authors.forename: Frank
authors.initials: F
authors.lastname: Hagelberg
authors.forename: Ming-Ju
authors.initials: MJ
authors.lastname: Huang
authors.forename: John D
authors.initials: JD
authors.lastname: Watts
authors.forename: T M
authors.initials: TM
authors.lastname: Simeon
authors.forename: Derricka
authors.initials: D
authors.lastname: Vereen
authors.forename: Wilbur L
authors.initials: WL
authors.lastname: Walters
authors.forename: Quinton L
authors.initials: QL
authors.lastname: Williams