Amplitudes of Vibration. Bastiansen-Morino Shrinkage

10 Mean Amplitudes of Vibration. Bastiansen-Morino Shrinkage 

The parallel (relative to the molecular axis) mean amplitudes of vibration were calculated from earlier published vibrational frequencies [1] and structural data assuming a linear N3 group [2]. Results at 300 K in A are [3]  

The mean amplitudes of the N-N vibrations are the same for HN3 and DN3 [3]. Similar results were obtained in a more recent calculation [4]. Perpendicular mean-square amplitudes are given in [5]. 

The calculated Bastiansen-Morino shrinkage effect in the N3 group (taken to be linear) was found to be 0.004251 A for HN3 and 0.003923 A for DN3 [5]. 

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