Naslov
N, PI -Interactions in Polycyclic Unsaturated Ketones: Photoelectron Spectroscopic Study

Autori
Kovač, Branka ; Novak, Igor ; Mlinarić-Majerski, Kata ; Vinković, Marijana ; Kaselj, Mira

Izvornik
Journal of organic chemistry (0022-3263) 59 (1994), 11; 3033-3036

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Polycyclic unsaturated ketones ; photoelectron spectroscopic ; n ; pi-interactions

Sažetak
He I photoelectron spectra (PE)of several ß, gama-unsaturated polycyclic ketones, their parent ketones, and alkenes have been measured. The assignmentof spectra is based on semiempirical MO calculations (PM3 method)and empirical arguments. Endo-derivatives showed larger HOMO/SHOMO band separation then exo-cyclic unsaturated ketones. The results of MO calculations are in good agreement with this general trend. Strikingly different photochemical transformations and pi*-n electronic transition intensities, exhibited by the two groups of compounds, can be rationalized within the framework of oxygen lone pair pi bond interacttions.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA