Schuster, Ingeborg I. published the artcileA carbon-13 NMR study of the 1:1 hydrogen bond between trifluoroacetic acid and aromatic ethers in deuteriochloroform, HPLC of Formula: 2944-47-0, the publication is Journal of Organic Chemistry (1991), 56(2), 624-31, database is CAplus.
From the measured values of the equilibrium constants and 13C NMR shift changes for 1:1 hydrogen bonding of trifluoroacetic acid with 2-alkyl- and 2,6-dialkylanisoles and 7-alkyl-2,3-dihydrobenzofurans in deuteriochloroform, conclusions are drawn concerning the stereochemistries of the hydrogen bonded complexes. The data indicate that hydrogen bonding of the planar 2-alkylanisoles may involve rotation of the methoxy group about the aryl-OCH3 bond, the rotational angles ranging from 13° (anisole) to 43° (tert-butylanisole). The values of log K1 correlate roughly with the torsional potential for methoxy group rotation in anisole, recently obtained by means of quantum mechanics, and with the angle-dependent electron densities at the methoxy oxygens that have been calculated for these o-alkylanisoles. The equilibrium constants for hydrogen bonding of the 2,6-dialkylanisoles also follow the predicted order of increasing methoxy oxygen electronic charge. The results for the rotationally rigid 2,3-dihydrobenzofurans are compatible with preferential involvement of the oxygen sp2 lone electron pair in hydrogen bond formation.
Journal of Organic Chemistry published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C15H14O, HPLC of Formula: 2944-47-0.
Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem