title: Synthesis and racemization process of chiral carbon nanorings: a step toward the chemical synthesis of chiral carbon nanotubes.
abstract: A simple and realistic model for the shortest sidewall segments of chiral single-walled carbon nanotubes (SWNTs) has been designed, and one of the chiral carbon nanorings, cyclo[13]paraphenylene-2,6-naphthylene ([13]CPPN, 1) has been successfully synthesized. DFT calculations reveal that the racemization energy of 1 is 8.4 kcal·mol(-1). In addition, some important energetic values, such as racemization barriers and strain energies, of other chiral carbon nanorings have been systematically estimated for future molecular design.
authors.affiliation: Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.
authors.forename: Haruka
authors.initials: H
authors.lastname: Omachi
authors.forename: Yasutomo
authors.initials: Y
authors.lastname: Segawa
authors.forename: Kenichiro
authors.initials: K
authors.lastname: Itami