N-C Axially Chiral Anilines Electronic Effect on Barrier to Rotation and A Remote Proton Brake

Yumiko Iwasaki 1 Ryuichi Morisawa 1 Satoshi Yokojima Hiroshi Hasegawa Christian Roussel 2 Nicolas Vanthuyne 2 Elsa Caytan 3 Osamu Kitagawa 1
1 Shibaura Institute of Technology
2 ISM2 - Institut des Sciences Moléculaires de Marseille
3 ISCR - Institut des Sciences Chimiques de Rennes
Abstract : N-Aryl-N-methyl-2-tert-butyl-6-methylaniline derivatives exhibit a rotationally stable N-C axially chiral structure and the rotational barriers around an N-C chiral axis increased with the increase in electron-withdrawing character of para-substituent on the aryl group. X-ray crystal structural analysis and the DFT calculation suggested that the considerable change of the rotational barriers by the electron effect of para-substituents is due to the disappearance of resonance stabilization energy caused by the twisting of para-substituted phenyl group in the transition state. This structural property of the N-C axially chiral anilines was employed to reveal a new acid-decelerated molecular rotor caused by the protonation at the remote position (remote proton brake).
Keywords : amines axial chirality density functional calculations electronic effect proton brake
Document type :
Journal articles
Complete list of metadatas

Cited literature [16 references]  Display  Hide  Download
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01771098
Contributor : Laurent Jonchère <>
Submitted on : Sunday, April 7, 2019 - 6:40:05 AM
Last modification on : Saturday, April 13, 2019 - 1:19:53 AM

File

2018-kita1.pdf
Files produced by the author(s)

Identifiers

Collections

UNIV-RENNES1 | UNIV-RENNES | UR1-UFR-SPM | INC-CNRS | ISCR-PRATS | ISM2 | ISCR | EC-MARSEILLE | UNIV-AMU | INSA-GROUPE

Citation

Yumiko Iwasaki, Ryuichi Morisawa, Satoshi Yokojima, Hiroshi Hasegawa, Christian Roussel, et al.. N-C Axially Chiral Anilines Electronic Effect on Barrier to Rotation and A Remote Proton Brake. Chemistry - A European Journal, Wiley-VCH Verlag, 2018, 24 (17), pp.4453-4458. ⟨10.1002/chem.201706115⟩. ⟨hal-01771098⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

90

Files downloads

50