Abstract
The radical cations of various cyclopentadiene dimers can be generated by photoinduced electron transfer to strong electron acceptors. Nuclear spin polarization effects observed during these reactions provide insight into the radical cation structures. Three of the systems studied, endo-[4 + 2]-( 1), anti-[2+2]-( 2), and exo-(4+2]-dicyclopentadiene ( 5) give rise to unusual singly linked, delocalized radical cations, whereas the anti-[4 + 4]-dimer ( 3) and 1,3-bishomocubane ( 4) give rise to more conventional radical cations. The reactions of spiroheptadiene ( 9) and di(spiroheptadiene) ( 10) provide evidence for two different dimer radical cations, a doubly linked (D) and a singly linked (S) species. This finding supports a stepwise mechanism for the radical cation Diels-Alder reaction of 9.
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.
