Di-fert-butyl ether

Langer, S., E. Ljungstrom, I. Wangberg, T. J. Wallington, and O. J. Nielsen, Atmospheric Chemistry of Di-fert-butyl Ether—Rates and Products of the Reactions with Chlorine Atoms, Hydroxyl Radicals, and Nitrate Radicals, Int. J. Chem. Kinet, 28, 299-306 (1996). 

Use Learning By Modeling to make models of water, methanol, dimethyl ether, and di-tert-butyl ether. Minimize their geometries, and examine what happens to the C—O—C bond angle. Compare the C—O bond distances in dimethyl ether and di-fert-butyl ether. 

Table III-B-30. Rate coefficients (k, cm molecule s ) for reaction of OH with di-fert-butyl ether [(CHslaCOClCHslj]...

CHROMIC ACID, DI-fert-BUTYL ESTER (1189-85-1) A strong oxidizer. Violent reaction with reducing agents, alcohols, combustible materials, ethers, fluorine, hydrazine, powdered metals, including aluminum, magnesium, zirconium, potassium iodide, sodium tetraborate, sodium tetraborate decahydrate, sodium borohydride. Incompatible with water, steam. 

ACN = acetonitrile BuOH = butanol MBE = methyl fert-butyl ether MP = mobile phase SP = stationary phase. DEHPA = di-[2-ethylhexyl]phosphoric acid TEA = trifluoroacetic acid MP = mobile phase SP = stationary phase. 

MTBE Methyl fert-butyl ether DIB Di-iso-butene or iso-octene WHSV Weight hourly space velocity PAI Polyamideimide... 

A similar reaction of i -Bu2Mg with 2,6-di-fert-butylphenol in the presence of 18-crown-6 affords i-BuMgOC6H3Bu-r-2,6(18-crown-6) (209) as a crystalline solid. An X-ray crystal-structure determination showed that this compound in the solid state also exists as a monomer with a a-bonded i-butyl group and a a-bonded phenoxy oxygen atom. Three adjacent oxygen atoms of the crown-ether are involved in coordination to magnesium, resulting in penta-coordination. 

Such a phenol keto-tautomer equivalent strategy was used for conjugate reduction of cyclic enones (equation 5). The quinone monoketals 9 and para-quinol ethers 10 were used as precursors to keto-tautomer equivalents of substituted phenols, namely enones 11, which were prepared by action of bis(2,6-di-fert-butyM-methylphenoxy)methylaluminium (MAD), followed by addition of lithium tri-iec-butyl borohydride (L-Selectride). The enones 11 obtained are reasonably stable at a freezer temperature without aromatization. ... 

Co(salen)-catalyzed oxidation of phenols with fert-butyl hydroperoxide in CH2CI2 at room temperature provides predominantly tert-butylperoxylated products . On catalytic oxidation of 2,6-di(tert-butyl)-4-acetylphenol oxime O-methyl ether (261), both o- and p-(ferf-butylperoxy)quinol ethers (262 and 263) were obtained in 8.1 and 87.3% yields, respectively. On the other hand, catalytic oxidation of 264 provided the corresponding o- and p-quinol ethers (265 and 266) in 91.1 and 6.8% yields, respectively (Scheme 56). The remarkable difference of the o/p ratio in the reactions of 261 and 264 reflects clearly a combination of both steric and electronic factors. 

Figure 5.13 Separation of phenolic antioxidants by thin-layer chromatography. Solvent benzene development distance 15 cm indicators (a) borate buffer (b) 0.1% 2,6-dichloro quinonechlorimide in methanol. 1 = hydroquinone monobenzyl ether 2 = 2,6-di-rerr-butyl-phenol 3 = 2,6-di-tert-butyl-4-methyl-phenol 4 = 2,6-di-tcrt-butyl-a-methoxy-4-methyl-phenol 5 = 2-a-methyl-cyclohexyl-4, 6-dimethyl-phenol 6 = butylated hydroxyanisole 7 = butylated hydroxy toluene 8 = 4,4"-bis (2,6-di-terf-butyl-phenol) 9 = 2,2"-methylene-bis (4-methyl-6-terf-butyl-phenol) 10 = 2,2"-methylene-bis (4-ethyl-6-fert-butyl-phenol) Reproduced from Kreiner and Warner, Journal of Chromatography [119]...

Figure lll-B-7. Arrhenius plot of the rate coefficient for the reaction of NO3 with Ce ethers (di-n-propyl ether, DnPE di-isopropyl ether, DiPE ethyl rerr-butyl ether, ETBE and fert-amyl methyl ether, TAME). 

---