Template effects in the formation of [2]pseudo-rotaxanes containing diazapyrenium units.
The template effects exerted by guests 14 and 15 in the ring closure reaction of 3 have been quantitatively evaluated. The rate largely increases in the presence of the two templates. The results are compared with those relative to the ring closure reaction of 1 yielding cyclobis(paraquat-p-phenylene), 2. The comparison indicates that the formation of tetracationic aromatic cycles templated by aromatic donors benefits from the use of extended pi surfaces both in the acceptor and in the donor components.
Doddi
Giancarlo
G
Dipartimento di Chimica e CNR-IMC, Università di Roma La Sapienza, Piazzale Aldo Moro 5, 00185 Rome, Italy.
Ercolani
Gianfranco
G
Mencarelli
Paolo
P
Papa
Giuseppe
G