Instability of 15-electron derivatives. X-ray structure of Cp☆MoCl2(PMe2Ph)2 and [Cp☆MoCl2(PMe2Ph)2]AlCl4

Fatima Abugideiri (1) , D. Webster Keogh (1) , Heinz-Bernhard Kraatz (1) , Wayne Pearson (2) , Rinaldo Poli (1)

1 University of Maryland [College Park]
2 United States Naval Academy

The complex Cp★MoCl2(PMe2Ph)2 (Cp★ = η5C5Me5) has been obtained in good yield from Cp☆MoCl4, PMe2Ph2, and Na in the appropriate stoichiometric ratio, and it is also obtained by a ligand redistribution process after reduction of Cp☆MoCl3- (PMe2Ph) with Na. This compound is oxidized by the CH2Cl2 solvent in the presence of AlCl3 to afford the salt [Cp☆MoCl2(PMe2Ph)2AlCl4. Both compounds have been characterized crystallographically and by 1H-NMR spectroscopy. The reasons for the instability of 15-electron Cp☆MoCl2L complexes are discussed. The 1H-NMR resonance data for Cp☆MoCl2L2(L=PMe3,PMe2Ph) and [Cp☆MoCl2(PMe2Ph)2]+ are also discussed.

Mots clés: Molybdenum; Crystal structure; Cyclopentadienyl

Domaines: Chimie de coordination; Cristallographie

Fatima Abugideiri, D. Webster Keogh, Heinz-Bernhard Kraatz, Wayne Pearson, Rinaldo Poli. Instability of 15-electron derivatives. X-ray structure of Cp☆MoCl2(PMe2Ph)2 and [Cp☆MoCl2(PMe2Ph)2]AlCl4. Journal of Organometallic Chemistry, 1995, 488 (1-2), pp.29-38. ⟨10.1016/0022-328X(94)00005-W⟩. ⟨hal-03532366⟩