Ethane hydride Methyl

Synonyms Bimethyl Dimethyl Ethyl hydride Methyl methane Ethane, copressed (UN1035, DOT) Ethane, refrigerated liquid (UN 1961, DOT)... 

In neither reaction was the ylide isolated, but its existence was inferred from product isotope distributions. TMO BF ( C or D labelled) was mixed with NaH in a flask and the mixed solids heated with a flame until the highly exothermic reaction initiated. Analysis of the head gas shows the presence of ethylene (0.3-2.5%) and ethane (0.3-2.1%), among other products (Tables 2 and 3). Although hydride methylation to CH and TMO decomposition to DME were the... 

Synonyms Bimethyl, dimethyl, ethyl hydride, methyl-methane CAS Registry Number 74-84-0 DOT Proper Shipping Name Ethane... 

Above 323 K, the surface hydride catalyzes the hydrogenolysis of neopentane, isobutane, and propane, whereas ethane does not undergo any significant hydrogenolysis. The first step of the reaction is the activation of the C—H bond, whereas the next step is the activation of the C—C bond of the alkyl groups via (l-methyl migration steps. 

To a stirred solution of 28.4 parts of 1H-1,2,4-triazole in 135 parts of N,N-dimethylformamide were added 11.4 parts of a sodium hydride dispersion 80% under nitrogen atmosphere. After stirring for 1 hour at room temperature, a solution of 40 parts of 6-[chloro(4-chlorophenyl)-methyl]-l-methyl-lH-benzotriazole in 90 parts of N,N-dimethylformamide was added to the mixture. The whole was stirred for 1 hour at 60°C. The reaction mixture was diluted with 50 parts of water and the whole was evaporated. The residue was extracted with ethyl acetate. The extract was washed with water, dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of dichloromethane and methanol (99 1 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from a mixture of 2-propanone and l,l -oxy-bis-ethane (ether). The product was filtered off and dried, yielding 13 parts (29.2%) of 6-[(4-chlorophenyl)-(lH-l,2,4-triazol-l-yl)methyl]-l-methyl-lH-benzotriazole MP 178.9°C. A resolution of enantiomers any usual method gave crystals from 2-propanol, MP 130-135°C. [a]D20 = 8.0° (plus or minus) (c = 10 in CH3OH). 

The mass spectrometric evidence on the hydride-ion transfer from C3H8 to methyl, ethyl and vinyl ions has been discussed vide supra). A careful quantitative study (Bone e al., 1967) showed that the hydride ion abstraction (29) represents indeed the predominant reaction of propynyl ions in propane, being four to ten times faster than any competing process. The hydride-ion transfer (33), which causes the formation of C3H7T, is observed in the mass spectrometer (Derwish et al., 1964b Bone et al., 1967 Munson et al., 1964), as well as the transfer from CsHs to the C2HI and 03 ions, that represents the source of ethane and propylene, according to Eqs. 30 and 32. 

Mechanistically, two pathways are logical (Scheme 3). The ethyl cation can directly alkylate methane via a pentacoordinated carbonium ion (Olah) (path a), or alternatively, although a less favorable pothway (b), the ethyl cation could abstract a hydride ion from methane. The methyl cation thus formed, which is less stable by 39 kcal/mole (26), could then react directly with ethylene. In the latter case, propylene and/or polymeric material would probably be formed since the hydrogen required for a catalytic reaction has been consumed by the formation of ethane. 

In G, the methyl disproportionation reaction observed in thermal decomposition of tetramethylammonium cations, the hydride receiver may be a surface methoxyl group, v hile the hydrogen-deficient ( oxidized ) moiety is a formaldehyde-like species, and ultimately, C=0 and H2. Ethane was detected (H) as a minor product during the alkylation of isobutane with ethylene over REHX catalyst assuming a classical... 

Indeed, the reaction was first observed in the synthesis of the hydrides. As mentioned above, when 5 is heated under dry hydrogen to 150 °C for three hours, (=SiO)3ZrH (14) is formed together with nine equivalents of methane and three equivalents of ethane. The formation of methane and ethane rather than neopentane was clear evidence of hydrogenolysis under the synthesis conditions [5, 15, 16]. It was observed that the reaction of neopentane occurred by stepwise formation of firstly isobutane and methane, then conversion of the former to a second equivalent of methane and propane which is further converted to ethane and a third equivalent of methane. The C-C bond of ethane cannot be cleaved by P-methyl elimination because a surface metal-ethyl fragment has no methyl group in the S-position. 

Frankland was completely uninfiuenced fay Laurent smd Gerhardt s reforms and their use of Avogadro s hypodiesis. As seen in Frankland s figures, methyl has a density almost twice that df hydride of methyl. Yet he cemsidered the former a radical from which methane was made by mMtim of hydrogen. His methyl was in fact ethane.—O.T.B.]... 

A variety of synthetic methods employs tin hydrides as the starting materials. The interaction of triethyltin hydride with diethylmercury leads to hexaethylditin, mercury, and ethane 228). Hexamethylditin has been obtained by treatment of dimethyltin dihydride with sodium in liquid ammonia, followed by addition of methyl iodide. 

---