Vibronic coupling and Jahn-Teller effect in negatively charged benzene and [18]annulene

Kazunari Yoshizawa, Takashi Kato, Tokio Yamabe

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The vibronic (vibrational-electronic) interactions and Jahn-Teller distortions in the mono- and trianions of benzene and [18]annulene, which show delocalized D6h structures in their neutral states, are discussed. E2g modes of vibration remove the orbital degeneracies in these highly symmetric molecules to lead to D2h distortions. We calculate the electronic structures, vibrational modes, and linear vibronic coupling constants of benzene and [18]annulene as well as their deutero-forms using the B3LYP method, a hybrid (Hartree-Fock/density functional theory) method. The C-C stretching E2g mode of 1656cm-1 and the C-H stretching E2g mode of 3184cm-1 give large vibronic coupling constants in the mono- and manions of benzene. On the other hand, in [18]annulene the lowest E2g mode of 116 cm-1 affords extremely large coupling constants in its mono- and trianions to contribute to the Jahn-Teller distortions. The lowest mode of [18]annulene is related to a deformation of the carbon ring of [18]annulene and analogous to acoustic mode of phonon in solid. Thus, the different types of E2g mode play an important role in the Jahn-Teller distortions in negatively charged benzene and [18]annulene.

Original languageEnglish
Pages (from-to)7637-7644
Number of pages8
JournalJournal of Chemical Physics
Volume108
Issue number18
DOIs
Publication statusPublished - May 8 1998
Externally publishedYes

Fingerprint

Jahn-Teller effect
Benzene
benzene
Stretching
vibration mode
electronics
Electronic structure
Density functional theory
Carbon
Molecules
density functional theory
electronic structure
orbitals
acoustics
carbon
rings
molecules

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Vibronic coupling and Jahn-Teller effect in negatively charged benzene and [18]annulene. / Yoshizawa, Kazunari; Kato, Takashi; Yamabe, Tokio.

In: Journal of Chemical Physics, Vol. 108, No. 18, 08.05.1998, p. 7637-7644.

Research output: Contribution to journalArticle

@article{94510d07c90f46228aee936d4bea6a30,
title = "Vibronic coupling and Jahn-Teller effect in negatively charged benzene and [18]annulene",
abstract = "The vibronic (vibrational-electronic) interactions and Jahn-Teller distortions in the mono- and trianions of benzene and [18]annulene, which show delocalized D6h structures in their neutral states, are discussed. E2g modes of vibration remove the orbital degeneracies in these highly symmetric molecules to lead to D2h distortions. We calculate the electronic structures, vibrational modes, and linear vibronic coupling constants of benzene and [18]annulene as well as their deutero-forms using the B3LYP method, a hybrid (Hartree-Fock/density functional theory) method. The C-C stretching E2g mode of 1656cm-1 and the C-H stretching E2g mode of 3184cm-1 give large vibronic coupling constants in the mono- and manions of benzene. On the other hand, in [18]annulene the lowest E2g mode of 116 cm-1 affords extremely large coupling constants in its mono- and trianions to contribute to the Jahn-Teller distortions. The lowest mode of [18]annulene is related to a deformation of the carbon ring of [18]annulene and analogous to acoustic mode of phonon in solid. Thus, the different types of E2g mode play an important role in the Jahn-Teller distortions in negatively charged benzene and [18]annulene.",
author = "Kazunari Yoshizawa and Takashi Kato and Tokio Yamabe",
year = "1998",
month = "5",
day = "8",
doi = "10.1063/1.476199",
language = "English",
volume = "108",
pages = "7637--7644",
journal = "Journal of Chemical Physics",
issn = "0021-9606",
publisher = "American Institute of Physics Publising LLC",
number = "18",

}

TY - JOUR

T1 - Vibronic coupling and Jahn-Teller effect in negatively charged benzene and [18]annulene

AU - Yoshizawa, Kazunari

AU - Kato, Takashi

AU - Yamabe, Tokio

PY - 1998/5/8

Y1 - 1998/5/8

N2 - The vibronic (vibrational-electronic) interactions and Jahn-Teller distortions in the mono- and trianions of benzene and [18]annulene, which show delocalized D6h structures in their neutral states, are discussed. E2g modes of vibration remove the orbital degeneracies in these highly symmetric molecules to lead to D2h distortions. We calculate the electronic structures, vibrational modes, and linear vibronic coupling constants of benzene and [18]annulene as well as their deutero-forms using the B3LYP method, a hybrid (Hartree-Fock/density functional theory) method. The C-C stretching E2g mode of 1656cm-1 and the C-H stretching E2g mode of 3184cm-1 give large vibronic coupling constants in the mono- and manions of benzene. On the other hand, in [18]annulene the lowest E2g mode of 116 cm-1 affords extremely large coupling constants in its mono- and trianions to contribute to the Jahn-Teller distortions. The lowest mode of [18]annulene is related to a deformation of the carbon ring of [18]annulene and analogous to acoustic mode of phonon in solid. Thus, the different types of E2g mode play an important role in the Jahn-Teller distortions in negatively charged benzene and [18]annulene.

AB - The vibronic (vibrational-electronic) interactions and Jahn-Teller distortions in the mono- and trianions of benzene and [18]annulene, which show delocalized D6h structures in their neutral states, are discussed. E2g modes of vibration remove the orbital degeneracies in these highly symmetric molecules to lead to D2h distortions. We calculate the electronic structures, vibrational modes, and linear vibronic coupling constants of benzene and [18]annulene as well as their deutero-forms using the B3LYP method, a hybrid (Hartree-Fock/density functional theory) method. The C-C stretching E2g mode of 1656cm-1 and the C-H stretching E2g mode of 3184cm-1 give large vibronic coupling constants in the mono- and manions of benzene. On the other hand, in [18]annulene the lowest E2g mode of 116 cm-1 affords extremely large coupling constants in its mono- and trianions to contribute to the Jahn-Teller distortions. The lowest mode of [18]annulene is related to a deformation of the carbon ring of [18]annulene and analogous to acoustic mode of phonon in solid. Thus, the different types of E2g mode play an important role in the Jahn-Teller distortions in negatively charged benzene and [18]annulene.

UR - http://www.scopus.com/inward/record.url?scp=0000620835&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000620835&partnerID=8YFLogxK

U2 - 10.1063/1.476199

DO - 10.1063/1.476199

M3 - Article

VL - 108

SP - 7637

EP - 7644

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

IS - 18

ER -