Abstract
A number of chemical-shift measurements were made on dimethylformamide (DMF) as a pure liquid and in the solvents carbon tetrachloride, acetone-d6, fluorotrichloromethane, and hexamethyldisiloxane. These measurements included (1) the temperature dependence of the methyl-doublet separation, (2) the effect of solvent and concentration on the methyl-doublet separation, and (3) the effect of temperature, solvent, and concentration on the chemical shift of the formyl proton resonance and on the center of the methyl doublet. The results show large solvent effects that are interpreted in terms of dipolar association between DMF and solvent. No evidence for hydrogen-bonded species was found. Activation energies for the barrier to hindered rotation were calculated and were found to depend strongly on the nature of the solvent.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
