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  • Title: Aromatic C-H...O interactions in a series of bindone analogues. NMR and quantum mechanical study.
    Author: Sigalov M, Vashchenko A, Khodorkovsky V.
    Journal: J Org Chem; 2005 Jan 07; 70(1):92-100. PubMed ID: 15624909.
    Abstract:
    The aromatic C-H...O hydrogen bonding within the series of the structurally relative indenone derivatives has been studied. The presence of the hydrogen bonds is corroborated by the large low-field chemical shifts of the protons involved in the hydrogen bond observed experimentally and reproduced by quantum mechanical calculations. Further confirmation is provided by analysis of the orbital overlap coefficients, (13)C NMR chemical shifts, and one-bond spin-spin coupling constants J((13)C-(1)H). The relationship between molecular geometry and (1)H NMR chemical shifts of involved protons has a complex nature, but the C-H...O distance is the principal factor.
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