Recueil des Travaux Chimiques des Pays-Bas p. 48 - 53 (1987)
Update date:2022-08-11
Topics:
Brouwer, A. M.
Jacobs, H. J. C.
The characteristic NMR and vibrational spectroscopic properties of 1-methylene-2-vinylcyclopropane 1 and some of its derivatives are described and discussed.The exocyclic C=C stretching vibration is consistently found at 1745 cm-1.The 1H NMR spectra show coupling patterns among the methylene and ring protons that are essentially independent of the substituents.The coupling constant between H-2 and the α-proton of the substituent depends on the conformation. 13C chemical shifts and coupling constants are readily interpreted using common substituent effect rules.MNDO calculations provide proton-proton distances and both orders which are used to interpret proton relaxation rates and proton-proton coupling constants.
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