Tris 2-methoxyethoxy

The hydroxide anion catalyzed rate constants for the scries of alkyl tris-(2-methoxyethoxy)silanes obtained by Fohl were used to define a modified Taft equation, log(/cHO//cHO ) = 2.48cr +1.67 Es [42], A good correlation was obtained, except for vinyl and phenyl substituents. The anomalous behavior observed for phenyl and vinyl tris-(2-methoxyethoxy)silanes may have resulted because the steric parameter or the polar parameter may be influenced by the carbon-carbon double bond. The steric parameter for a,yS-unsaturated substituents may include an appreciable resonance effect. The polar parameter values may be influenced by the ability of silicon to back-bond through d orbitals with the a,/J-unsaturated system [37,49]. 

Acid catalysis—hydrolysis. Several series of alkylsilane esters were studied to determine the effect of silane structure on the hydronium ion catalyzed hydrolysis reaction. The hydronium ion catalyzed hydrolysis rate constants for a series of alkyl tris-(2-methoxyethoxy)silanes in aqueous solution were used to define the modified Taft equation log(A /Ah ) = 0.39a + 1.06ES, where Ho is the rate of hydrolysis for methyl tris-2-(methoxyethoxy)silane [42], The hydronium ion catalyzed hydrolysis rate constants and the reaction half-lives are reported in Table 2. In a similar manner, the hydronium ion catalyzed hydrolysis rate constants for a series of trialkylalkoxysilanes in 55% aqueous acetone were used to obtain the modified Taft equation log(/cH//cHo) = -0.37 a + 2.48 E where kHo is the rate of hydrolysis for trimethylalkoxy-silane. 

Figure 4. Bronsied plot of the logarithm of the general base catalyzed hydrolysis rate constants vs. the p/C of the conjugate acids of the oxygen and nitrogen bases (buffers) for phenyl tris-(2-methoxyethoxy)silane ( ) and phenyl bis-(2-methoxyethoxy)silanol ( ) in aqueous solution at 30 C. and for tert-butyldimethyl-3-nitrophenoxysilane ( ) in 70% water/dioxane at 37°C.

An interesting phenomenon occurs for the oligomeric tri(2-methoxyethoxy) ethyl cellulose (TMEC) [85,86] and triheptyl cel-... 

CAS 1067-53-4 EINECS/ELINCS 213-934-0 Synonyms 6-Ethenyl-6-(methoxyethoxy)-2,5,7,10-tetraoxa-6-silaunde-cane Silane, tris (2-methoxyethoxy) vinyl- 2,5,7,10-Tetraoxa-6-sila-undecane, 6-ethenyl-6-(2-methoxyethoxy)- Tris (methoxyethoxy) vinylsilane Tris (2-methoxyethoxy) vinylsilane (Tris (P-methoxyeth-oxy)) vinylsilane Vinyltris (methoxyethoxy) silane Vinyltris (P-meth-oxyethoxy) silane Empirical C H2406Si... 

Methyltriacetoxysilane Silane, triphenyl-. See Triphenylsilane Silane, tripropyl-. SeeTripropylsilane Silane, tris (2-methoxyethoxy) vinyl-. See Vinyltris (2-methoxyethoxy) silane Silane, tris (trimethylsiloxy)-. See Tris (trimethylsiloxy) silane... 

Tris (methoxyethoxy) vinylsilane Tris (2-methoxyethoxy) vinylsilane (Tris (P-methoxyethoxy)) vinylsilane. See Vinyltris (2-methoxyethoxy) silane Tris [1-(2-methyl-aziridinyl) phosphine oxide] CAS 57-39-6... 

EPDM-g-TMEVS Ethylene-propylene-diene monomer grafted with tris(2-methoxyethoxy)vinylsilane... 

Clymidine [339-44-6], antidiabetic, 138. Phosgene is employed to activate dime-thylformamide 134 for the aminoformylation of l,l,2-tris(2-methoxyethoxy)ethane 135 [97-100]. 

Ramar and Alagar [28] compared the dielectric strengths of non-clay-reinforced ethylene-propylene-diene-tris(2-methoxyethoxy)vinyl silane-grafted and ethylene-propylene-polymethyl methacrylate blends. The values of dielectric strength, volume resistivity, surface resistivity, and arc resistance increased with increasing... 

A-172 Vinyl-tris(2-methoxyethoxy)silane CH2=CHSi(0CH2CH20CH3)3 CH3O 1 II polyethylene and and polypropylene... 

Schroeder G, Gierczyk B, Waszak D, Kopczyk M, Walkowiak M (2006) Vinyl tris-2-methoxyethoxy silane a new class of film-forming electrolyte components for Li-ion... 

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