On the additivity of bond dipole moments. Stark effect studies of the rotationally resolved electronic spectra of aniline, benzonitrile, and aminobenzonitrile

David R. Borst, Timothy Michael Korter, David W. Pratt

Research output: Contribution to journalArticle

59 Scopus citations


We study the influence of an applied electric field on the fully resolved electronic spectra of aniline (AN), benzonitrile (BN), and 4-aminobenzonitrile (ABN) in the gas phase. Using these data, we test the commonly held but rarely proven assumption that the total dipole moment of a polyatomic molecule is the vector sum of bond dipole moments, localized in different parts of the molecule. We find that μ a(ABN)≈μ a(AN)+μ a(BN) in the excited S 1 state, but not in the ground S 0 state. Possible reasons for this non-additivity are discussed.

Original languageEnglish (US)
Pages (from-to)485-490
Number of pages6
JournalChemical Physics Letters
Issue number5-6
StatePublished - Dec 28 2001
Externally publishedYes


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

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