Methyl silyl ether

Homopolymers and copolymers containing carbosiloxane and carbosilane units have been produced that bear latent reactive sites along the chain [184]. Reactive carbosiloxane and unreactive carbosilane homopolymers were first prepared in order to ensure catalyst monomer compatibility and to set end points for copolymer properties. Carbosiloxane homo- and copolymers were synthesized with latent reactivity dispersed throughout the polymer chain in the form of methyl silyl ethers (Scheme 21). It is well known that Si-OMe bonds, although inert during metathesis, can react with atmospheric moisture creating stable Si-O-Si bonds and methanol [185]. 

In the second example the diazene possesses a four-carbon tether with two stereogenic centers. The major product can be viewed as arising via a pathway where the tether coils to resemble a chair form of cyclohexane with the methyl, silyl ether and tive-membered ring occupying pseudoequatorial positions. Iliat the observed stereospecificity is due to the preference for the substituents to orient themselves... 

Disiloxane (H3SiOSiH3) and methyl silyl ether (H3COSiH3)... 

CHgOSi Methyl silyl ether 1.15 0.02 C2H402 Acetic add 1.70 0.03... 

Problem 173 The ZSiCX valence angle in methyl(silyl)ether is 120°. Could this angle be determined by across-angle repulsion Would you expect the coordination geometry of the N atom in methyl(disilyl)amine to be planar What about dimethyl(silyl)amtne (The former is found to be planar, the second nearly so.)... 

Another interesting case of migration of a methoxide to a neutral silicon center has been reported by Krempp and Damrauer. These authors reported that silanamide anions, HsSiNH (92), react with methyl formate to form the neutral methyl silyl ether and the formamide anion (equation 41). The thermodynamic driving force for this reaction as well as the above-mentioned rearrangements are most likely the formation of the strong Si—O... 

Methyl silyl ether CHjOSi 1.15 0.02 2 Propanal (gauche) C3H30 2.86 0.01 5... 

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