Luminescence studies on substituted niobocene ketene complexes: evidence for thermally activated excited-state processes involving arene torsion
Abstract
Photophysical studies on the η2-C,O bound nibocene ketene complexes [Nb(η5-C5H4SiMe3)2(H)(OCCRR′)](R = R′= Ph 1, R = Me, R′= Ph 2) provide evidence for solution luminescence and temperature-dependent decay rates; the failure of 2 to exhibit photochemical E–Z isomerization is consistent with the operation of arene torsional modes in the thermal decay processes.