One-Electron Reduction of 2-Mono(2,6-diisopropylphenylimino)acenaphthene-1-one (dpp-mian)

The electrochemical characteristics of 2-mono(2,6-diisopropylphenylimino)acenaphthene-1-one (dpp-mian) have been investigated. One-electron reduction of dpp-mian involves the iminoketone fragment, which is revealed by the EPR spectrum obtained after the electrolysis of the dpp-mian solution in tetrahydrofuran (THF). The reduction of dpp-mian with one equivalent of metallic potassium leads to a similar EPR spectrum. The sodium complex [(dpp-mian)Na(dme)]₂ ( 1 ) produces an EPR signal with hyperfine coupling on the nitrogen atom of the iminoketone fragment of the dpp-mian ligand. Dpp-mian can also be reduced in a one-electron process by SnCl₂×(dioxane). In this case, complex (dpp-mian)₂SnCl₂ ( 2 ) is formed, with the tin atom displaying an oxidation state of +4. Tin(II) chloride dihydrate, SnCl₂×2(H₂O), also reduces dpp-mian, but the two ligands bound to tin in the product form a new carbon–carbon bond between the ketone moieties of the dpp-mian monoanions to form complex (bis-dpp-mian)HSnCl₃ ( 3 ). Metallic tin reduces dpp-mian to form the (bis-dpp-mian)₂Sn ( 4 ) species. Compounds 1 – 4 were characterized by X-ray diffraction.     

Stannylenes based on neutral,anionic, and dianionic 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene

Russian Chemical Bulletin - The reaction of 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (dpp-bian (1)) with one equivalent of SnCl2 gave the complex [(dpp-bian)0SnCl2] (2) containing the...