title: Through-space electrostatic interaction between the electron-donating 1,3-diphosphacyclobutane-2,4-diyl units.
abstract: Catenation of stable 1,3-diphopsphacyclobutane-2,4-diyl units with biphenyl-, diphenyl ether-, and diphenylmethane-based bridging groups were utilized for evaluation of the distinct through-space interaction between the electron-donating P-heterocyclic biradical chromophores. Structural properties of the oligo(biradicals), characterized by X-ray crystallography and DFT calculation, suggest a possible distance between the biradical units for the through-space interaction.
authors.affiliation: Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552, Japan. ito.s.ao@m.titech.ac.jp
authors.forename: Shigekazu
authors.initials: S
authors.lastname: Ito
authors.forename: Makoto
authors.initials: M
authors.lastname: Kobayashi
authors.forename: Koichi
authors.initials: K
authors.lastname: Mikami