Knowledge Bank

The techniques of high resolution Raman spectroscopy were used in an investigation of the rotational spectra of $Hg(CH3)2$ and $Hg(CD3)2$. The spectra were photographical in the second order of 21-ft, grating (6.7 $cm-1/mm$). Lines of the S branches with J up to about 100 were observed: their s pacing is about $0.46cm-1$ for the lighter molecule and about 0.36 $cm-1$ for the deuterated species. An analysis gave the values $Bo=0.1162$ and 0.0912 $cm-1$ and $IB\circ =(240.9\pm 0.4)\times 10-40$ and $(306.9\pm 0.7)\times 10-40$ gm $cm2$ for $Hg(CH3)2$ and $Hg(CD3)2$ respectively. The interruclear distance r(C-Hg) was determined to be $2.094\pm 0.005\backslash AA.$