Knowledge Bank

The $\nu 2$ bending mode of the $AsH2$ radical in the $X~2B1$ state has been investigated using $CO2$ laser magnetic resonance spectroscopy. A large number of resonances have been observed in the $920-1070cm-1$ region. Many resonances show the characteristic quarters of resolved $\mathrm{<mrow\; data-mjx-texclass="ORD">75</mrow>}As(T=3/2)$ hyperline structure. The $AsH2$ radical was produced in a discharge flow system by adding to arsine $(AsH3)$ the products of a microwave discharge of $H2$ in Ar. The current evidence for the active species as $AsH2$ is mainly chemical. The results of the spectrum assignment and parameter determination, currently underway, should confirm the identity.