title: Electronic effects of substituents on the stability of the iridanaphthalene compound [Ir[upper bond 1 start]Cp*{=C(OMe)CH=C(o-C6[upper bond 1 end]H4)(Ph)}(PMe3)]PF6.
abstract: Iridanaphthalene complexes are synthesized from the corresponding methoxy(alkenyl)carbeneiridium compounds. The electronic character of the substituents on the 6-position of the metallanaphthalene ring is crucial from the point of view of the stability of the iridanaphthalene, [Ir[upper bond 1 start]Cp*{=C(OMe)CH=C(o-C[upper bond 1 end]6H4)(Ph)}(PMe3)]PF6, vs. its transformation to the corresponding indanone derivatives. Stability studies of the iridanaphthalene compounds revealed that strong electron donor substituents (-OMe) stabilize the iridanaphthalene, while weak electron donor (-Me) and electron withdrawing (-NO2) groups favor the formation of indanone derivatives. Two possible indanone isomers can be obtained in the conversion of the unstable iridanaphthalene complexes and a mechanism for the formation of these isomers is proposed.
authors.affiliation: Departamento de Química Inorgánica, Universidad de Vigo, Campus Universitario, E-36310 Vigo, Spain. bgs@uvigo.es.
authors.forename: M
authors.initials: M
authors.lastname: Talavera
authors.forename: J
authors.initials: J
authors.lastname: Bravo
authors.forename: J
authors.initials: J
authors.lastname: Castro
authors.forename: S
authors.initials: S
authors.lastname: García-Fontán
authors.forename: J M
authors.initials: JM
authors.lastname: Hermida-Ramón
authors.forename: S
authors.initials: S
authors.lastname: Bolaño