THE ELECTROCHROMISM SPECTRA OF THE 3s - n MOLECULAR RYDBERG TRANSITION IN CYCLOBUTANONE, CYCLOPENTANONE AND CYCLOHEXANONE

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 Title: THE ELECTROCHROMISM SPECTRA OF THE 3s - n MOLECULAR RYDBERG TRANSITION IN CYCLOBUTANONE, CYCLOPENTANONE AND CYCLOHEXANONE Creators: Causley, G. C.; Russell, B. R. Issue Date: 1976 Publisher: Ohio State University Abstract: The excited state properties of the first 3s - n Rydberg transitions of cyclobutanone, cyclopentanone and cyclohexanone have been investigated using electrochromic techniques. These molecules all have a relatively sharp structured band, which corresponds to this transition, in their near vacuum ultraviolet vapor phase absorption spectra at ca. 200 nm. The technique used to obtain the Stark field spectra for these bands was developed by Scott and $Russell.^{1}$ The electric field spectra were numerically fit to a three term expression, which is a function of the absorption spectra and the first and second derivatives of the absorption spectra. The coefficients obtained from this evaluation are all proportional to the electric field strength squared and are used to determine the dipole moment and mean polarizability changes between the ground and excited states. The results of this study will be discussed with respect to available data on the 3s $\leftarrow$ n molecular Rydberg states of these ketones as well as other ketones, primarily acetone, for which the eletrochromism data has been obtained. Particular stress will be placed on the interrelation of excited state dipole moment and mean polarizability to transition strength and energy. Description: $^{1}$John D. Scott and B. R. Russell, J. Chem. phys. 63, 3243 (1975). This work was supported by the Robert A. Welch Foundation. Author Institution: Department of Chemistry, North Texas State University URI: http://hdl.handle.net/1811/9593 Other Identifiers: 1976-FD-5