Knowledge Bank

Cyclopropenone-$d0$ and $-d2$ have been studied as solid and liquid in both the Raman and infrared spectrum. In addition the 1600 - $2000cm-1$ infrared region has been observed in the gas phase for both molecules. The results indicate that the interpretation of the spectra of this molecule will have to be substantially different than that advanced for the substituted cyclopropenones. The region $1750cm-1$ to $1900cm-1$ contains two strong infrared bands in both cyclopropenone-$d0$ and cyclopropenone-$d2$, but neither appears to be the double bond stretch. The double bond is assigned at $1467cm-1$ in cyclopropenone and $1395cm-1$ in cyclopropenone-$d2$. This assignment does not correlate well with previous assignments for the substituted cyclopropenones.