Trimethyl methane

Figure 9.5-2 The excess Gibbs energy for several mixtures. Curve 1 Trimethyl methane (1) and benzene at 0°C. [Data from V. Mathot and A. Desmyter, J. Chem. Phys. 21, 782 (1953).] Curve 2 Trimethyl methane (1) and carbon tetrachloride at 0°C. [Data from ibid.] Curve 3 Methane (1) and propane at 100 K. [Data from A. J. B. Cutler and J. A. Morrison, Trans. Farad. Soc., 61, 429 (1965).] Curve 4 Water (1) and hydrogen peroxide at 75°C. [From the smoothed data of G. Scatchard, G. M, Kavanagh, and L. B. Ticknor, J. Am. Chem. Soc., 74, 3715 (1952).]...

Alternative Names/Abbreviations Trimethyl methane, 2-methyl propane... 

Vapor-Phase Mechanisms. Phosphoms flame retardants can also exert vapor-phase flame-retardant action. Trimethyl phosphate [512-56-1] C H O P, retards the velocity of a methane—oxygen flame with about the same molar efficiency as antimony trichloride (30,31). Both physical and chemical vapor-phase mechanisms have been proposed for the flame-retardant action of certain phosphoms compounds. Physical (endothermic) modes of action have been shown to be of dominant importance in the flame-retardant action of a wide range of non-phosphoms-containing volatile compounds (32). 

Trimethyl aluminum and propylene oxide form a mixture of 2-methyl-1-propanol and 2-butanol (105). Triethyl aluminum yields products of 2-methyl-1-butanol and 2-pentanol (106). The ratio of products is determined by the ratio of reactants. Hydrolysis of the products of methyl aluminum dichloride and propylene oxide results ia 2-methylpropeae and 2-butene, with elimination of methane (105). Numerous other nucleophilic (107) and electrophilic (108) reactions of propylene oxide have been described ia the Hterature. 

Commercially important di- and polyphenoHc stabilizers include 2,2 -methylenebis(6-/ r2 -butyl- -cresol) [85-60-9] (7), l,3,5-trimethyl-2,4,6-tris(3 5 -di-/ /f-butyl-4-hydroxyben2yl)ben2ene [1709-70-2] (8), and tetrakis [methylene(3,5-di- / r2 butyl-4-hydroxyhydrocinnamate)]methane [6683-19-8] (9). 

Compound 13a can been obtained via two different routes firstly in the reaction of 11 with dimethyl aluminum chloride where LiCl is eliminated and secondly by the reaction of di(pyridyl) phosphane 12 (Py2PH) with trimethyl aluminum where methane is formed, (Scheme 5). The X-ray structure determination of [Me2AlPy2P] 13a, (Fig. 3) elucidates the aluminum atom to be coordinated by the two nitrogen atoms of the pyridyl rings in addition to the two remaining methyl groups leaving the aluminum four... 

S)-2-(6-methoxy-2-naphthalenyl)-a,5,5-trimethyl-l,3-di-oxane-2-methanal methanesulfonate... 

A methanogenic bacterium was isolated from oil reservoir brines by enrichment with trimethylamine. Methane production occurred only with trimethyl-amine compounds or methanol as substrates. Sodium ions, magnesium ions, and potassium ions were all required for growth. This organism appears to be a member of the genus Methanohalophilus based on substrate utilization and general growth characteristics [695]. 

Treatment of l-[2-(2-methoxy-5-isopropylphenyl)-l-hydroxyethyl]-2,6,6-tri-methylcyclohexene with triethylsilane and boron trifluoride etherate in dichloro-methane at —10° leads to its reduction to 2-(2,6,6-trimethyl-l-cyclohexenyl)-l-(2-methoxy-5-isopropylphenyl)ethane in 69% yield (Eq. 36).174... 

Tris(phenylthio)methyllithium, (QHsS)3CLi (1). Tris(phenylthio)methane is prepared from thiophenol and trimethyl orthoformate. 

The thermal decomposition of trimethyl aluminium has been investigated by Yeddanapalli and Shubert117 and by Ouimet118. In both investigations the decomposition was found to occur by a predominantly homogeneous chain reaction and methane was the major gaseous product (CH4 > 91 % above 400 °C and 100 torr pressure CH4 99 %). 

Studies of the pyrolysis of these three alkyls may conveniently be discussed in a combined section. The decompositions were carried out in a conventional toluene carrier flow system using contact times of 1-2 sec120,122,123. The conditions used satisfy both plug flow and thermal equilibrium requirements68,69. Toluene to alkyl ratios greater than 50 in the trimethyl gallium system and greater than 200 in the trimethyl indium and thallium studies were required to obtain first-order dependence in terms of the alkyl concentration. Under these conditions methane and ethane are produced by the reactions... 

Trimethyl orthoformate Orthoformic acid, trimethyl ester (8) Methane, trimethoxy- (9) (149-73-5)... 

As reported by Steel et al. three structural isomers of bis(camphor-pyrazol-l-yl)methane (21a, 21b and 21c) are formed by coupling of camphorpyrazole 10 [i.e., (4S,7i )-7,8,8-trimethyl-4,5,6,7-tetrahydro-4,7-methano-l(2)H-indazole] with CH2CI2 (121). Isomer 21c can be separated from the other two structural isomers by crystallization or column chomatography. Deprotonation at the bridging carbon atom, subsequent reaction with carbon dioxide and acidic workup yields the enantiopure bis(camphorpyrazol-l-yl)acetic acid Hbpa (8) (Scheme 17, Fig. 19) (116). Due to missing substituents at the p5rrazolyl carbon C5 and a hence likely ortho metallation, isomers 21a and 21b are not suited for his reaction (72). 

Electrons have not been detected by optical absorption in alkanes in which the mobility is greater than 10 cm /Vs. For example, Gillis et al. [82] report seeing no infrared absorption in pulse-irradiated liquid methane at 93 K. This is not surprising since the electron mobility in methane is 500 cm /Vs [81] and trapping does not occur. Geminately recombining electrons have, however, been detected by IR absorption in 2,2,4-trimethyl-pentane in a subpicosecond laser pulse experiment [83]. The drift mobility in this alkane is 6.5 cm /Vs, and the quasi-free mobility, as measured by the Hall mobility, is 22 cm /Vs (see Sec. 6). Thus the electron is trapped two-thirds of the time. 

Nitro-propen3 In einem Kolben werden 1,14 g (0,01 mol) Allyl-trimethyl-silan in 10 m/ trockenem Di-chlor-methan auf — 78° gekiihlt, innerhalb 20 min 1,33 g (0,001 mol) Nitronium-tetrafluoroborat zuge-geben. Man leitet einen schwachen Stickstoffstrom durch das GefaB um entstehendes Fluor-trimethyl-silan und Trifluor-boran abzufuhrcn. Nach 30 min ist alles Nitronium-Salz vcrschwunden. Man laBt auf 20° erwarmen, zieht das Dichlormethan ab und destilliert i.Vak. Ausbeute 0,7 g (80%) Sdp. 62°/25 Torr (3,25 kPa). 

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