Knowledge Bank

In continuation of our $analysis1,2$ of the antisymmetric wagging band $(va=1\leftrightarrow 0$, 1020--860 $cm-1$) of hydrazine, $NH2NH2$, an examination with $0.002cm-1$ resolution has recently been made by the use of infrared diode lasers. The J-structures of the $a-RQ5,b-RQ5,b-PQ8,b-PQ9,c-RQ3,c-PQ8,d-RQ7,d-RQ5,d-PQ7$, and $d-PQ8$ clusters have been analyzed, where a, b, c, and d are the components of the inversion splitting in each transition (C-type) (see the figure). It has been found that the inversion splitting becomes smaller with increasing J and with increasing K, both in the $va=0$ state (shown by b-c) and $va=1$ state (shown by a-d). An explanation is given for this finding. [FIGURE]