Abstract
Generation and transformation of alkenyl carbenium ions formed upon adsorption of hydrocarbons in zeolites were investigated by UV-VIS spectroscopy. Bands generally observed in the ranges of 290–320, 350–370 and 430–460 nm were assigned to mono-, di- and trienylic carbenium ions. Characteristic band shifts of the alkenyl carbenium ions to the higher wavelengths were found, due to the formation of branched, i.e. more stable carbenium ions. Standard heats of formation, obtained from semiempirical methods showed that with increasing alkyl substitution the stability of carbenium ions increases. The π-π ★ MO distances computed are in accordance with the experimentally observed shifts of the band maxima.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
