Anteunis, M.; Vandewalle, M. published the artcile< Long-range phenomena. XII. Organic mass spectrometry. VII. Enolization in 3-oxotetrahydrofuran. PMR and MS study>, Electric Literature of 5455-94-7, the main research area is PMR oxotetrahydrofuran enolization; mass spectra oxotetrahydrofuran enolization.
A PMR study shows extensive enolization in the 3-oxotetrahydrofurans with branched substitution at C-5. Next to classical M-mode long range couplings, non-planar (non-classical) long range couplings, J(2,4) and J(2,5) are common features. The 3-oxotetrahydrofuran ring is easily changed conformationally, which is reflected by changes in vicinal and long range coupling values. The mass spectra of the keto- and enol mols. show different fragmentation patterns. The expulsion of an alkane moiety, directly from the molecular ion (M+), is observed for the enol form. Mass spectrometry allows easy characterization of C-2 or C-5-substituted 3-oxotetrahydrofurans.
Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about Mass spectra. 5455-94-7 belongs to class tetrahydrofurans, and the molecular formula is C8H14O2, Electric Literature of 5455-94-7.
Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem