Knowledge Bank

Ab initio LCAO-MO-SCF and configuration interaction calculations are reported for the geometrical isomers of $FO2$ and $C102$ and the HOO radical. Explanations are provided for the existence of C100, F00, and OC10 and the nonexistence of OFO. The ground states of these geometrical isomers and other qualitative features of their spectra are discussed. The ground $^\{2\}A^\{\backslash prime\}^\{\backslash prime\}$ state and lowest lying $\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}A\prime$ state of HOO are discussed with respect to the correlation diagram for the reaction $H+O2\leftharpoondown \rightharpoonup OH+0$.