1. Anteunis, M. Prof. Belgium: State University of Gent. for the 300 MHz spectra. Compounds1, and2were synthesized by Mrs. C. Fulea, University of Bucharest, Romania This work was supported by the National Research Council of Canada. 220 MHz n.m.r. spectra were obtained at the Canadian 220 MHz N.m.r. Centre, Sheridan Park, Ontario, under the direction of Dr. A. E. Gray. We are indebted to
2. The fact that the peaks aresharpbefore and after the onset of splitting supports this interpretation
3. The idea of different rate processes for C2and C6protons is not consistent with rotational motion around the C[dbnd]N bond, or with ring inversion or N inversion; no other phenomenon could be envisaged which would lead to different rate processes
4. Temperature‐Dependent Chemical Shifts in the NMR Spectra of Gases