Influence of steric and electronic effects of substituents on the molecular structures and conformational flexibility of 1,8-naphthalenedicarboximides

A. Yu Kovalevsky, I. I. Ponomarev, M. Yu Antipin, I. G. Ermolenko, O. V. Shishkin

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A series of 1.8-naphthalenedicarboximide derivatives containing substituents of different steric and electronic nature were studied by X-ray diffraction analysis. Ab initio quantum-chemical calculations in the HF/3-21G approximation demonstrated the high conformational flexibility of the imide tetrahydro ring in the molecules of these compounds. The electronic nature of the substituents has no effect on the geometry and conformational flexibility of naphthalenedicarboximides due to weak conjugation between the imide and naphthalene fragments in the molecules. However, the steric effects of the bulky substituents noticeably affect the equilibrium geometry of the imide ring by increasing its conformational flexibility.

Original languageEnglish
Pages (from-to)70-76
Number of pages7
JournalRussian Chemical Bulletin
Volume49
Issue number1
DOIs
StatePublished - 2000
Externally publishedYes

Keywords

  • 1,8-naphthalenedicarboximide
  • Conformational flexibility
  • Conjugation
  • Molecular structure
  • Quantum-chemical calculations

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