Knowledge Bank

The high resolution infrared vibration-rotation spectra of both $\mathrm{<mrow\; data-mjx-texclass="ORD">10</mrow>}BD3$CO and $\mathrm{<mrow\; data-mjx-texclass="ORD">11</mrow>}BD3$CO have been obtained in the region of $2170cm-1$. The $v2$and $\nu 2$ + $\nu 8$ - $\nu 8$ bands of both Isotopic molecules were analysed and band constants calculated. The two rotational constants $B0$ obtained from this study may be used with the $B0$ previously obtained for the $\mathrm{<mrow\; data-mjx-texclass="ORD">10</mrow>}BH3$CQ and $\mathrm{<mrow\; data-mjx-texclass="ORD">11</mrow>}BH3$CO molecules to calculate the four structural parameters of borine carbonyl. It will be shown that, because of the high degree of correlation between two molecular parameters, there exists a large uncertainty in two of the four molecular parameters.