would be expected to disfavor such addition reactions in the absence

would be expected to disfavor such addition reactions in the absence of dipolar character as shown in 1. Indeed, addition reactions of silicon fluorid...
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7106 Table I. Reactions of 1,l-Dimethyl-1-silaethene, (CH&Si=CH2 (2), with Silicon Halides at 611 ~

~

~~

O

a

~~~~~

Products Reaction no.

[SiMeZb (mmol)

Substrate

(mmol)

Me2S?SiMe2

1 :1 Adduct

Y

~

1 2 3 4 5 6 7

18.4 13.9 13.3 14.3 9.76 10.1 15.3

SiFa HSiC1, SiC14 MeSiC1, Me2SiC12 Me,SiCl CF,

(-124) (49.8) (20.5) (38 .O) (26.4) (27.2) (112)

-

(zyie1d)c ~

F3SiCH2SiMe2F HC129iCH2SiMe2C1 C13SiCHzSiMepCl ClzMeSiCH2SiMe2Cl C1Me2SiCH2SiMeK1 Me,SiCH2SiMezC1

(44) (22) (20) (16) (13) (