Fert-Butyl alcohol

Allyl alcohol fert-Butyl alcohol Ethylene glycol... 

Buten-2-ol, 3-bromo-2-methyl, acetate, 35 fert-Butyl alcohol, potassium salt [2-Pro-panol, 2-methyl-, potassium salt], 29... 

GC assay of the organic layer showed no EIN(TMS)2 remaining after 15 min of stirring (GC conditions Restek RTX-1 column (30 m x 0.53 mm, 1 m film thickness), 2.53 mL/min, initial temperature 50°C, final temperature 300°C, rate 20 deg/min, injection temperature 200°C, detector temperature 350°C, injection volume 1 pL, inject sample neat retention times fert-butyl alcohol 1.4 min, THF 1.7 min, heptane 2.1 min, HN(TMS)2 2.6 min, ethylbenzene (present in commercial LHS) 3.1 min, te/ t-butyl acetate 4.0 min). Volume percents were determined based on standard solution counts. 

Obtain five small dry test-tubes (75 x 10 mm.) and introduce 1 ml. of the following alcohols into each ethyl alcohol, n-butyl alcohol, sec.-butyl alcohol, cyclohexanol and fert.-butyl alcohol. Add a minute fragment of sodium to each and observe the rate of reaction. Arrange the alcohols in the order of decreasing reactivity towards sodiiun. 

To examine how and why the surface ethanol reaction is assisted by the gas-phase ethanol, the following experiments were conducted in a closed circulating reactor. Ethanol vapor was first admitted onto the dioxoniobium monomer catalyst (1), Si0 2Nb(=0)2, to form the niobium ethox-ide (2), Si0 2Nb(=0)(0H)(0C2H5), at 373 K, followed by evacuation, and then the system was maintained at 523 K for 10 min, where no H2 evolution was observed because the niobium ethox-ide (2) was stable up to 600 K in vacuum. After the confirmation of no H2 formation from the preadsorbed ethanol (2), tert-butyl alcohol was introduced to the system at 523 K, which led to a stoichiometric evolution of H2 and CH3CHO. As the fert-butyl alcohol molecule has no extractable a-hydrogen, it is evident that both H2 and CH3CHO were produced from the preadsorbed ethanol by the assistance of the postdosed tert-butyl alcohol. 

Probl0m 7.51 Potassium /er/-butoxide, K OCMCj, is used as a base in E2 reactions, (a) How does it compare in effectiveness with ethylamine, CHjCH NH (f>) Compare its effectiveness in the solvents fert-butyl alcohol and dimethylsulfoxide (DMSO) (c) Give the major alkene product when it reacts with (CH JjCClCHjCH,. 

Use of scavengers. Can fert-butyl alcohol (TBA) be applied without constraints in reaction kinetic measurements No, TBA influences the kLa-value considerably (alpha factor). B 3.2.2... 

The sorption of n-butyl alcohol and (err-butyl alcohol on phenyl modified MCM-41 type sorbent having pores of approximately 20 A diameter (i.e. in the microporous range), has been studied. Comparison of butanol sorption with nitrogen, water, and benzene sorption data indicates that steric hindrance significantly affects the sorption of n-butyl alcohol by the microporous silica, far more so than for tert-butyl alcohol. The different shapes of the isotherms obtained on the microporous material (Type I for fert-butyl alcohol, Type IV for 71-butyl alcohol) suggest that the preferred mechanism for adsorption of leiY-butyl alcohol is via organic interactions with surface phenyls, whereas for n-butyl alcohol, a mechanism of polar interaction is more likely. 

In l-chloro-2-fluoroacenaphthene [5S] and in 2,3-dihalo-2,3-dihydrobenzofiiran [59, 60], potassium terf-butoxide eliminates hydrogen fluoride in preference to hydrogen chloride. trhydrogen fluoride quantitatively on treatment with sodamide in fert-butyl alcohol [60] (equation 29). 

A comparable reaction does not take place in fert-butyl alcohol as solvent (see Section 8-7F). Suggest a mechanism for the reaction and explain why DMSO is a better solvent for the reaction than fert-butyl alcohol. What products would you expect to be formed using 4-bromo-1-methylbenzene in place of bromobenzene ... 

Exercise 14-24 What products would you expect from the reaction of bromoform, CHBr3, with potassium fert-butoxide in fert-butyl alcohol in the presence of (a) t rans-2-butene and (b) c/s-2-butene ... 

The reducing agent is prepared from LiAlhL, and fert-butyl alcohol — it is milder than LiAIH4 (see Method 5b) the preferred solvent is diglyme, (CH30CH2CH2)20. 

H20 Water 100 C4H10O fert-Butyl alcohol 82.55 CeHn Cyclohexane 80.75 65 8 21... 

In order to keep down the volume of the reaction mixture, less fert-butyl alcohol is used than is necessary to dissolve the potassium feri-butoxide. 

The reaction proceeds via a pentacoordinate hydroxycarbonium ion transition state, which cleaves to either fert-butyl alcohol or the tert-butyl cation. Since 1 mol of isobutane requires 2 mol of hydrogen peroxide to complete the reaction, one can conclude that the intermediate alcohol or carbocation reacts with excess hydrogen peroxide, giving fcrt-butyl hydroperoxide. The superacid-induced rearrangement and cleavage of the hydroperoxide results in very rapid formation of the dimethylmethyl-carboxonium ion, which, upon hydrolysis, gives acetone and methyl alcohol. 

Alcohols. Explosion of mixtures with alcohols can be initiated by shock or heat8 furfuryl alcohol ignites on contact with 85% peroxide8 addition of concentrated acid to alcohol-peroxide mixtures may result in explosion adequate cooling must accompany initial additions of fert-butyl alcohol to H202 H2S04 (1 2 by weight) mixtures to prevent explosive decomposition."... 

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