65523-27-5Relevant academic research and scientific papers
Sterically Hindered Free Radicals, IX. Generation and Structure of Stannyl Radicals R3Sn* with Bulky Groups
El-Farargy, Ahmed F.,Lehnig, Manfred,Neumann, Wilhelm P.
, p. 2783 - 2794 (2007/10/02)
Methylated phenyl groups in hexaaryldistannanes cause reversible thermal dissociation R3Sn-SnR3 (1) 2 R3Sn* (2) only if at least the 2,6-positions are methylated.Further methyl groups enhance this dissociation only when neighbouring these positions and each other, thus causing a buttressing effect .So, DSn-Sn is decreased (51.5 -> 38.5 kcal/mol).ESR data and geometry of 2 are reported, as well as those of stannyl radicals 2, R = PhmMenCCH2 (m + n = 3) generated from the corresponding hydrides.The rotation around C-Sn bonds is hindered with increasing m.A preferred conformation is concluded from ESR data.Numerous compounds 1, R3SnH, and other precursors are prepared for the first time.
TRIARYL-SILYL, -GERMYL, AND -STANNYL RADICALS MAr3 (M=Si, Ge, OR Sn AND Ar=2,4,6-Me3C6H2) AND Ge(2,6-Me2C6H3)3: SYNTHESIS AND ESR STUDIES
Gynane, Michael J. S.,Lappert, Michael F.,Riley, Paul I.,Riviere, Pierre,Riviere-Baudet, Monique
, p. 5 - 12 (2007/10/02)
The triarylmetal-centred radicals MAr3 (M=Si, Ge, or Sn: Ar=2,6-Me2C6H3 or 2,4,6-Me3C6H2) have been prepared from the appropriate triarylmetal chloride, MAr3Cl, and an electron-rich olefin >2 (R=Me or Et) under UV irradiation in toluene at low
