Intramolecular rearrangement in diphenylfulvene complexes of iridium(I) and rhodium(I) |
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| Affiliation: | 1. Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52074 Aachen, Germany;2. Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR 7583 (CNRS/Univ. Paris Est & Paris Diderot), Université Paris Est, 61 avenue du Général de Gaulle, F-94010 Créteil cedex, France |
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| Abstract: | Variable temperature NMR spectra of the complexes [M(C5H4CPh2)(C8H12)]X (C5H4CPh2 = 6,6-diphenylfulvene; C8H12 = 1,5-cyclooctadiene; M = Ir, X = PF6; M = Rh, X = ClO4) provide evidence of intramolecular rearrangement involving rotation of the diphenylfulvene ligand about the metal-fulvene axis. Rearrangement is slow on the NMR time-scale for both complexes at 223 K: spectra recorded at higher temperatures indicate that the barrier to rotation of the diphenylfulvene ligand is lower for the iridium than for the rhodium complex. |
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