Raman Spectra of Some Molecules of the Pentatomic Type

Abstract

Raman spectra of a number of organic compounds containing a neopentyl group have been obtained. Among these is tetramethyl methane‐d₁. The spectrum of this compound shows the various types of isotope effects to be expected for a polyatomic molecule. It is also apparent from the spectrum that the vibrations of tetramethylmethane‐d₁ are less degenerate than the vibrations of tetramethylmethane. The spectrum of tetramethylsilicon has 5 lines in the internal vibration spectrum. The explanation for the existence of this extra line is probably the same as that given by Fermi in the case of CCl₄.