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Electron deficient carbon and silicon species

Oxiranes and Oxirenes S.OS.3.3.8. Electron deficient carbon and silicon species... [Pg.107]

A complete stereocontrol is achieved by addition of the bulky silyl radical (Me3Si)3Si to a chiral and conformationally flexible electron-deficient olefin 163, as shown in equation 68213. Replacement of (Me3Si)3Si with a less sterically hindered (n-Bu)3Sn gives a mixture of syn and anti diastereomeric adducts 164 and 165 in a ratio of 7 3. The A values (kcalmol-1) of the tin, carbon and silicon species follow the order (n-Bu Sn (1.1) < Me (1.7) < Me3Si (2.5), and the bond length for C—Sn (2.2 A) is longer than that for C-Si (1.85 A)214 215. [Pg.475]

See other pages where Electron deficient carbon and silicon species is mentioned: [Pg.107]    [Pg.95]    [Pg.107]    [Pg.95]    [Pg.107]    [Pg.95]    [Pg.107]    [Pg.95]    [Pg.107]    [Pg.95]    [Pg.107]    [Pg.95]    [Pg.277]    [Pg.277]    [Pg.109]    [Pg.418]    [Pg.279]    [Pg.417]    [Pg.283]    [Pg.279]   


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Carbon electrons

Carbon species

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Silicon deficiency

Silicon species

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