2-methyl-2-propyl fluoride

Propene 1-(2-Hydroxy-ctliylthio)-3.8,3-trifluoio- ElOb,. 622 (FjC-CaCII 1 IIS-C,-OH) Thiocarbonyl Fluoridate S-(2.2-Di-fluoro-1-methyl-propyl)- F 10b,. 189 (CO -> CF2 CCI2 - CO)... 

Methyl-(2-methyl-propyl)- XII/1, 237 Methyl-(2-methyl-propyl)- -chlorid XII/1, 242 Methyl-(2-methyI-propyI)- -fluorid XII/1, 247 Methyl-(l-iuethyl-vinyl)- -(2-chlor-ethylester) E2, 205... 

For carbenium ions with none or just one alkyl substituent attached to C+, internal stabilization is lowered and strong coordination of solvent molecules can take place. For example, when CH3F is dissolved in SbFs/S02, the solvent is methylated so that instead of CH3+ the complex H3COSO+ is formed. [104,105] This occurs also for ethyl and iso-propyl fluoride while use of SO2F2 instead of SO2 prevents dissociation of CH3F or other monoalkyl fluorides. [105] Obviously, there seems to be a competition between solvent and anion to coordinate to the carbocation. 

Common Methyl chloride Ethyl bromide Propyl fluoride... 

Ethyl, n-propyl and isopropyl fluoroacetates were also readily prepared by heating the corresponding esters of chloroacetic acid with potassium fluoride in the rotating autoclave. Their toxicities were similar to that of methyl fluoroacetate. (It... 

It was obviously of interest to determine whether other esters of fluoroacetic acid would prove to be more or less toxic than the methyl ester. In the phosphorofluoridate series, for example, we found that esters of secondary alcohols were far more potent than those of primary alcohols for instance, di-isopropyl fluorophosphonate (I) was a compound of considerable activity. Accordingly ethyl, ra-propyl and isopropyl fluoroacetates were prepared by heating the corresponding esters of chloroacetic acid in the rotating autoclave with potassium fluoride. The toxicity figures of these esters were very similar to those of methyl fluoroacetate. 

Alkyl fluoride boron trifluoride systems were first investigated by Olah et al. (1957). 1 1 Addition complexes were observed at low temperatures, and their specific conductivity was measured. The specific conductivity of the propyl and butyl fluoride boron trifluoride systems was found three orders of magnitude larger than those of the methyl- and ethyl-fluoride systems. The latter systems on heating dissociated into their starting materials, whereas the former gave polymer mixtures (Olah, unpublished). 

Die durch Fluorid-Ionen induzierte Cyclisierung von Dichlor-essigsaure-[N-(2-trimethylsilyl-oximino-propyl)-anilid] fiihrt direkt zu 2-Formyl-4-methyl-l-phenyl-imidazol-3-oxidni. Die eigentlich erwartete 2-Dichlormethyl-Verbindung konnte nicht isoliert werden. 

Isocyanate, chlorosulfonyl-, 56, 41 Isocyanate, 2-propyl-, 56, 96 Isocyanide, benzyl-, 55, 98 Isocyanide, butyl-, 55, 98 ISOCYANIDE, tert-bulyl-, 55, 96 Isocyanide, cyclohexyl, 55, 98 Isocyanide, dodecanyl-, 55, 98 Isocyanide, ethyl-, 55, 98 Isocyanide, methyl-, 55, 98 Isocyanide, phenyl-, 55, 98 Isophorone, 57, 113 Isopropenyl acetate, 57, 113 Isopropyl alcohol, 58, 78,157 Isopropyl ether, 58, 45, 52 Isopropyl fluoride,58,78 Isopropylurea-polystyrene, 56, 96 Isoquinohne, 56, 20... 

Ethyl-phenyl- -(3-methyl-butylester) E2, 182 Ethyl-phenyl- -methylester E2, 216 Ethyl-phenyl- -pentylestcr E2, 182 Ethyl-(2-phcnylsulfonyl-vinyl)- -ethylester E2, 206 Ethyl-propyl- -butylester XII/1, 257 (Ethylthio-methyl)-phenyl- -ethylester Xll/1, 256 Ethyl-trichlormethyi- -methylester Xll/1, 255 Ethyl-vinyl- -chlorid Xll/1, 243 Ethyl-vinyl- -ethylester Xll/1, 249 -fluoride... 

Recent experimental studies have indicated that a- or p-substitution may alter the gas-phase substitution reactions in different ways than in solution. Kebarle has determined that the activation barrier for the gas-phase reaction of chloride with alkyl bromides increases as Me (-1.9 kcal mol" ) < Et (-1.3 kcal mol" ) < -Bu (0.0 kcal mol" ) < i-Pr (5.6 kcal mol" ). While a-branching does increase the barrier for the substitution reaction, p-branching appears to lower the barrier. This is even more apparent in the essentially equivalent rates for the reaction of fluoride with ethyl and neopentyl chlorides in the gas phase. Another example is the unexpectedly small difference (1.9 kcal mol" ) in the activation energies for the reactions of chloride with methyl- and ferf-butyl chlororoacetonitriles, which was subsequently expanded to include the ethyl and (-propyl analogs (Table 6A) ... 

The major commercial fluoropolymers are made by homopolymerization of tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE),vinyhdene fluoride (VF2), and vinyl fluoride (VF), or by co-polymerization of these monomers with hexafluoropropylene (HFP), perfluoro(propyl vinyl ether) (PPVE), per-fluoro(methyl vinyl ether) (PMVE), or ethylene. The polymers are formed by free-radical polymerization in water or fluorinated solvents. 

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