DIENE AND DIENYL COMPLEXES OF TRANSITION ELEMENTS. X. η5-CYCLOPENTADIENYL-η5-1-ARYLPENTADIENYLRHODIUM HEXAFLUOROPHOSPHATES. REACTIONS WITH HALIDE IONS. CRYSTAL AND MOLECULAR STRUCTURE OF η5-CYCLOPENTADIENYL-η5-1-PHENYLPENTADIENYLRHODIUM HEXAFLUOROPHOSPHATE

Article abstract of DOI:10.1016/S0022-328X(00)99557-3

The structure of η⁵-cyclopentadienylrhodium hexafluorophosphate has been determined by X-ray methods.Crystals are monoclinic, space group P2₁/a, Z = 4, with a 11.056(8), b 19.741(13), c 8.033(9) Angstroem, β 94,5(1) deg. 1204 above background reflections have been collected on a diffractometer and the structure refined to R 0.0070.The structure contains discrete cations and anions.In the cation the rhodium atom is bonded to the cyclopentadienyl ring (Rh-C 2.136(20), 2.152(23), 2.146(21), 2.164(22), 2.194(22) Angstroem) and to the pentadienyl moiety of the 1-phenylpentadienyl ligand (Rh-C 2.236(17), 2.105(22), 2.217(24), 2.081(21), 2.138(25) Angstroem).Kinetics of reactions of η⁵-cyclopentadienyl-η⁵-pentadienyl salts with LiCl, LiBr and NaI in acetone have been measured.Reaction rates are essentially independent of the nature and concentration of halide.