The vibrational transition energies of a diatomic molecule corresponding to $\mathrm{v}=1 \leftarrow \mathrm{v}=0$ and $\mathrm{v}=2 \leftarrow \mathrm{v}=1$ are $2143.1 \mathrm{cm}^{-1}$ and $2116.1 \mathrm{cm}^{-1}$, respectively. The anharmonic constant $\left(\omega_{\mathrm{e}} \chi_{\mathrm{e}}\right)$ of the molecule in $\mathrm{cm}^{-1}$ is