Oxidative Addition of Diorgano Disulfides to Distannyne [{2,6-(Me2NCH2)2C6H3}Sn]2.

Reactivity of [{2,6-(Me₂NCH₂)₂C₆H₃}Sn]₂ ( 1) towards functionalized diorganodisulfides R₂S₂ as oxidizing agents was studied. The reactions provided organotin(II) thio derivatives {2,6-(Me₂NCH₂)₂C₆H₃}Sn(S₂CNMe₂) ( 2), {2,6-(Me₂NCH₂)₂C₆H₃}Sn (SC₆H₄-2-NH₂) ( 3) and {2,6-(Me₂NCH₂)₂C₆H₃}Sn(SC₅H₄N) ( 4). The ¹¹⁹Sn NMR spectroscopic data of 2- 4 suggest different electronic saturation of the tin(II) atoms in 2- 4, which caused redox stability of 2 and easy oxidation of 3 and 4. The treatment of the latter compounds with diorgano disulfides R₂S₂ yielded organotin(IV) thio derivatives {2,6-(Me₂NCH₂)₂C₆H₃}Sn(SC₆H₄-2-NH₂)₃ ( 5) and {2,6-(Me₂NCH₂)₂C₆H₃}Sn(SC₅H₄N)₃ ( 6). In addition, oxidation of 3 and 4 with the radical TEMPO (2,2,6,6-tetramethylpiperidin-1-oxyl) provided organotin(IV) hydroxide [{2,6-(Me₂NCH₂)₂C₆H₃}Sn(SC₆H₄-2-NH)(μ-OH)]₂ ( 7) and organotin(IV) oxide [{2,6-(Me₂NCH₂)₂C₆H₃}Sn(SC₅H₄N)(μ-O)]₃ ( 8). All prepared compounds 2- 8 were characterized by using multinuclear NMR spectroscopy, and the molecular structures of 2, 4, 7 and 8 were determined by using X-ray diffraction. Compounds 2- 4 were also characterized by cyclic voltammetry. [ABSTRACT FROM AUTHOR]