Knowledge Bank

Microwave and low resolution infrared spectra of some isotopically substituted molecules of ozone have been recorded. 1. Low temperature infrared spectra of $\mathrm{<mrow\; data-mjx-texclass="ORD">16</mrow>}O3$ and $\mathrm{<mrow\; data-mjx-texclass="ORD">18</mrow>}O3$ in gaseous state give the following zero order parameters expressed in $cm-1$. $\mathrm{<mrow\; data-mjx-texclass="ORD">16</mrow>}\omega 1=1134.918\omega 1=1070.0$ $\mathrm{<mrow\; data-mjx-texclass="ORD">16</mrow>}\omega 2=716.018\omega 2=674.75$ $\mathrm{<mrow\; data-mjx-texclass="ORD">16</mrow>}\omega 3=1089.218\omega 3=1026.5$ A Darling and Dennison resonance has been found. 2. 8 to 400 GHz microwave spectra of the five oxygen-18 substituted ozone molecules give the rotational constants in their ground state levels. 3. Both results lead to the anharmonic potential function of ozone.