Chromium and molybdenum carbonyl complexes of C7Ph7H and C7Ph5Me2H and of C7Ph7H(CO), the Diels-Alder adduct of tetracyclone and triphenylcyclopropene: Variable-temperature NMR and x-ray cr

Article abstract of DOI:10.1021/om00003a015

The Diels-Alder reaction of tetraphenylcyclopentadienone (tetracyclone) with triphenylcyclopropene yields the adduct 2 with an endo hydrogen at C(7); thermal elimination of CO produces heptaphenylcycloheptatriene (1a). This initially formed isomer with a