Knowledge Bank

The $\nu 2$ bending fundamental of the $NH2$ radical $(\nu 0=1497.319$ $cm-1)$ has been studied by the technique of laser magnetic resonance. The $NH2$ radical was generated in a flow-through cell by reacting hydrogen atoms and hydrazine. The hydrogen atoms were generated by a microwave (2450 MHz) discharge of $H2O$. The cell was placed inside the CO laser cavity and between the pole caps of a Varian $15\prime \prime$ electromagnet. By using $\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}CO$ and $\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}CO$ laser lines, over 160 Zeeman resonances involving $J\le 7$ and $Ka\le 4$ have been detected and assigned, enabling accurate determination of the band origin and of the excited state rotational, centrifugal distortion, and spin-rotation interaction parameters.