Related Experiment Video
Updated: Jul 21, 2026

A New Straightforward Method for Lipophilicity (logP) Measurement using 19F NMR Spectroscopy
Published on: January 30, 2019
Reversible Diels-Alder addition to fullerenes: a study of equilibria using (3)He NMR spectroscopy
G W Wang1, M Saunders, R J Cross
1Contribution from the Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, USA.
Abstract:
3He NMR spectroscopy has been used to study the equilibria of Diels-Alder additions of 9,10-dimethyl anthracene (DMA) to (3)He@C(60) and (3)He@C(70). Spectra of a series of equilibrium mixtures showed peaks for the isomeric adducts. One monoadduct, six bis-adducts, eleven tris-adducts, and ten tetrakis-adducts of DMA to C(60) were seen. One monoadduct and three bis-adducts of C(70) were detected. Equilibrium constants were found for these reactions and values for DeltaG, DeltaH, and DeltaS were obtained.
Related Concept Videos
¹H NMR of Labile Protons: Deuterium (²H) Substitution
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
NMR Spectroscopy and Mass Spectrometry of Aldehydes and Ketones
¹³C NMR: ¹H–¹³C Decoupling
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
Mass Spectrometry: Isotope Effect
NMR Spectroscopy Of Amines

