Low Resolution Electronic Spectrum of Hexamethylbenzene with Application to Benzene

Abstract
The crystal spectrum of hexamethylbenzene has been obtained using polarized light in the region 1725—2800 A and the results including extinctions for out‐of‐plane absorption are interpreted. The vapor spectrum has been determined in the region 1300—2800 A and the solution spectrum down to 2150 A. The vapor spectrum shows a new band at 2350 A. A suggestion is made for determining quantum numbers in the Rydberg series formula.