Di-isobutyl ether

DIBE di-(isobutyl) ether HAMP isopentyl methyl phosphoric... 

The only information available regarding the atmospheric chemistry of di-isobutyl ether is a relative rate measurement of the rate coefficient for its reaction with OH (Bennett and Kerr, 1989), A = 2.6 x 10 cm molecule" s see table HI-B-29. However, we note that the majority of other OH-h ether rate coefficients reported by Bennett and Kerr (1989) have subsequently been found to be significantly low. Thus, no recommendation for the rate coefficient for reaction of OH with di-isobutyl ether can be made at this time. Despite these quantitative limitations, it seems likely that the atmospheric lifetime of this species will be quite short, about 4 h for [OH] = 2.5 x 10 molecule cm". An important site for OH reaction will likely be at the CH2 groups adjacent to the ether linkage major expected products from reaction at this site are acetone and isobutyl formate ... 

Many organic reagents have been used successfully in Pu separation processes. The reagents include tri- -butyl phosphate (TBP) methyl isobutyl ketone thenoyl ttifluoroacetone (TTA) ethers, eg, diethyl ether, di- -butyl ether, tetraethylene glycol dibutyl ether trdaurylamine (TT,A) trioctylamine (TOA) di- -butyl phosphate (DBP) hexyl-di(2-ethylhexyl) phosphate (HDEHP) and many others. Of these, TBP is by far the most widely used (30,95). 

A 1-M hexane solution of di isobutyl aluminum hydride (400 mL, 0.40 mol) (Note 10) is added dropwise with stirring at 0°C oxer a 1-hr period. The solution is stirred for 2 additional hr at 0°C. To quench the reaction 200 mL of methanol is carefully added to the stirred reaction mixture, followed slowly at first then more rapidly with 400 mL of water and then 300 mL of 10 sulfuric acidt solution. After the mixture is stirred for 10 min, it is transferred to a separatory funnel and 500 mL of 10% sulfuric acid solution is added. The separatory funnel is shaken vigorously for 5 min and the organic phase 1s separated. The aqueous phase is extracted four times with 300 mL of diethyl ether. The organic phases are combined and washed twice with 300 mL of saturated sodium bicarbonate solution, twice with 300 mL of water, twice with 300 mL of brine, and dried over magnesium sulfate. Solvent removal on a rotary evaporator followed by short path distillation at reduced pressure affords 31-34 g (40-44%, based on 3-ethoxy-6-methyl-2-cyclohexen-l-one) of 4-(E-l,2-dichlorovinyl )-4-methy 1-2-cyclohexen-l-one (1) as a colorless oil, bp 75-78°C (0.1 mm) (Note 11). 

Over a period of 15 min and whilst stirring 158.0 g of methyl N-isobutyl-N-nitroso-p-aspartate are added to 340 ml of acetic anhydride and then, drop by drop, 0.95 ml of 70% perchloric acid. The reaction mixture is then stirred for 2 h at room temperature. The acetic anhydride is evaporated under reduced pressure, and the residue is then successively dissolved once in 100 ml of chloroform, thrice in 100 ml of benzene each time and twice in 100 ml of diethyl ether each time, the solvent being evaporated each time under reduced pressure. 155.0 g of red oil are obtained which are dissolved in 2 volumes of hot di-isopropyl ether and cooled. After 1 min at 3°C the crystals which separate are filtered and there are thus obtained 78.0 g of methyl 3-isobutyl-4-sydnonyl acetate, melting point 39°C. 

C8H180 tert-butyl isobutyl ether 33021-02-2 439.93 38.143 2 15615 C8H18S2 di-tert-butyl disulfide 110-06-5 513.34 45.167 2... 

Thallium di-isobutyl chloride crystallises from hot alcohol, pyridine, or benzene, as well as cold ether, in long, glistening, colourless needles. The corresponding nitrate is a difficultly soluble, crystalline precipitate. 

Diethylamine Miscible Dieth ether Miscible bis-(2.ethylhexyl)amine 0.7 Diethyl sulfide MlKible Di-isobutyl carbinol Miscible Di-isobutylene 3.3 <0.6% DMSO soluble in di-isobutylei>e) Disopropyl ether 11 Dimethyl ether 4.4 Dimethyl formamide Miscible Morpholine Naphthalene Neoprene Nitrobenzene Oleic acid Ouricuri wax Oxalic add Palmitic acid Paraffin Paraformaldehyde Miscible 40 Insol. Miscible Misdble 38 100 Insoluble Insoluble Miscible Inso 1 Slightly soluble... 

Mono (2-ethylhexyl) phthalate Nonoxynol-4 Nonoxynol-6 Nonoxynol-7 Oleyl alcohol PEG di-2-ethylhexoate PEG-3 di-2-ethylhexoate PEG-8 distearate PEG-12 distearate PEG-7 glyceryl cocoate PEG-20 stearate Pine (Pinus palustris) tar Polyglyceryl-10 tetraoleate PPG-17 Propylene glycol myristate Stearyl nitrile Sucrose octaacetate Tributyl phosphate Tri-o-cresyl phosphite Tri-p-cresyl phosphite Vinyl isobutyl ether plasticizer, plastisol applies. 

N Tf -Di-isobutyl needles from AcOEt. M.p. 12()-5=. Sol. EtOH, MeOH, CHClg, AcOH. IjOss sol. EtjO, Ma CO, O Hg, AcOEt. Insol. HjO, pet. ether. 

Preparation of Poly(vinyl isobutyl ether) Using Di-tert-butyl Peroxide Initiator 249... 

Vinyl isobutyl ether Cyclohexane Di-/r/7-butyl peroxide ... 

To a reactor bomb are added 385 gm (500 ml, 5.35 moles) of vinyl isobutyl ether, 500 ml of cyclohexane, and 23.8 gm of di-tert-hutyl peroxide. The bomb is sealed and heated at 156" -158 C for 2 hr with agitation. The bomb is cooled, opened, and then stripped at lOO C to afford 303 gm of... 

Table 3.7 summarizes the molecular characteristics of the Block copolymers shown in Fig. 3.28. The homopolymer is poly(isobutyl vinyl ether) (PIBVE). PI and P2 are the block copolymers of isobutyl vinyl ether (IBVE) and a vinyl ether with a protected glucose residue (3-0-(vinyloxy) ethyl-1,2 5,6-di-O-isopropylidene-D-glucofuranose). 

With sodium, sodium isoamyl is formed, but in ethereal solution in a stream of carbon dioxide, isobutyl acetic acid results. Mercury di-isoamyl heated with zinc in a sealed tube for thirty-six hours at 180° C. yields zinc di-isoamyl. The mercury compound and glacial acetic acid heated for sixteen hours at 200° C. give isopentane, metallic mercury, and amyl acetate. Treatment with thallic chloride gives isoamyl mercuric chloride and thallous chloride. ... 

Proton transfer to monomer in the polymerization of a-methyl styrene can be suppressed by the presence of 2,6-di-t-butyl pyridine. This scavenges all the protons and effectively converts the reaction from a transfer to a termination reaction. The copolymerization of crmethyl styrene with isobutyl vinyl ether - has shown how the relative reactivities of carbenium and carboxonium ions affect conversion and molecular weights. Other interesting studies include the polymerization of substituted cs-methyl styrenes - and the stereospecific polymerization of anethole. ... 

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