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Org Lett. 2013 Jul 5;15(13):3404-7. doi: 10.1021/ol401456h. Epub 2013 Jun 13.

Through-space electrostatic interaction between the electron-donating 1,3-diphosphacyclobutane-2,4-diyl units.

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1
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

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.

PMID:
23763275
DOI:
10.1021/ol401456h
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