Abstract
Inelastic neutron scattering (INS) is used to obtain a direct measurement of the tunnel frequency of the methyl groups at 2 K in acetic acid ( ν 0 = 1.52 μeV) and its temperature dependence up to 38 K. Corresponding measurements of the libration frequency up to 90 K are also reported. In conjunction with a new 2 K crystal-structure determination, a recently published method for calculating rotational potentials of methyl groups from crystal structures is re-examined. Crystal structures at four different temperatures, and the improved calculation, are used to predict the temperature dependence of the rotational potential correctly.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.