$^{13}C$ MAGNETIC SHIELDING FROM BEAM MASER MEASURMENTS OF SPIN ROTATION INTERACTION IN $CH_{3}$ CN
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Date
1978
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Publisher
Ohio State University
Abstract
A beam maser spectrometer was used to make high resolution measurements (6 kHz f.w.h.m.) of $J=1\rightarrow 0$ transitions in $CH_{3}{^{13}}CN$. Spectra of $CH_{3}{^{12}}CN$. were obtained at higher resolution using Ramsey’s method of separated oscillating fields. Analysis of the spectra yielded values for quadrupole coupling, spin-rotation and spin-spin interaction strengths. The $^{13}C$ spin-rotation interaction strength was used to determine the paramagnetic contribution to the shielding tensor component $\sigma_{1}$. The diamagnetic contribution is obtained from molecular orbital calculations. Our results are compared with values obtained from liquid crystal and multiple pulse N.M.R. experiments.
Description
Author Institution: Department of Chemistry, University of Arizona