An unusual ring-opening reaction of (tetrafluorobenzobicyclo[2.2.2]octatriene)tricarbonyl-iron

Article abstract of DOI:10.1021/om00155a028

Reaction of the title compound I with aryllithium reagents in ether at low temperature and subsequent alkylation of the acylmetalates formed with Et₃OBF₄ leads to an unusual ring-opening reaction of the bicyclodiene ligand to generate novel chelated diallyldicarbonyliron complexes II-VII. Complex V belongs to the monoclinic space group C_2h⁶ - C2lc with a = 16.870 (4) ?, b = 13.707 (4) ?, c = 19.361 (4) ?, β = 107.92 (2)°, V = 4259 (1) ?³, and D_calcd = 1.51 g/cm³ for Z = 8. Least-squares refinement based on 2481 observed reflections led to a final R of 0.0409 and R_w of 0.0391.