Summary: Treatment of Me2Si(C5H5)Cl with Li2C2B10H10 followed by hydrolysis gave the new versatile ligand Me2-Si(C5H5)(C2B10H11) in 79% isolated yield, which can be converted into the monoanion, dianion, and trianion, respectively. It makes possible the synthesis of a wide range of organometallic complexes.

Summary: Reaction of Me2Si(C9H7)(C2B10H11) with 4 equiv of NaNH2 in dry THF, followed by treatment with 1 equiv of LnCl3, gave unprecedented tetranuclear clusters of the general formula [{(η5-μ2-C9H6SiMe2NH)-Ln}2(μ3-Cl)(THF)]2(í4-NH)âTHF (Ln) Gd (1), Er (2)) in moderate yield. Their molecular structures have been confirmed by single-crystal X-ray analyses, which represent the first organometallic clusters containing a central μ4-imido group.

Monofluorinated indolizines 4, benzo[d]indolizines 7 and 4H-pyrrolo[1,2-a]benzimidazoles 8 were synthesized in moderate yields by 1,3-dipolar reaction between fluorinated vinyl tosylates 2a and N-ylides of pyridinium, isoquinolinium and benzimidazolinium, generated in situ from their halides salts. When the same N-ylides were allowed to react with 2,3,3-trifluoro-1-propenyl tosylate 2b, the unexpected product formylated indolizines and their derivatives 9 were obtained. The reaction mechanism is also proposed.

The intermolecular additions of alkyl halides to per-(or poly)fluorophenyl aromatic aldimines using zinc as a single-electron-transfer radical initiator have been studied in aqueous media. The reaction proceeds well for imines with different substituents at room temperature under air atmosphere and the corresponding fluorine-containing amines and 1,2-diamines are obtained in poor to good yields. A tentative reaction mechanism is proposed.