CH3, Methyl

The hydroxyl hydrogen exchanges but the hydrogen atoms of the CH3 (methyl) group do not. 

SOLUTION (a) The longest chain contains four carbon atoms (butane). There are two CH3 (methyl) groups branching at the second carbon from the end of the chain (2). The correct name is... 

R = CH3 methyl 4-acetylamino-6-Jluoro-3,4-dihydro-2-methyl-2 i-l-benzopyran-4-carboxylate, yield 85% d.r. (trans/cis) 67 33... 

R = CH3 Methyl-benzyl-dther2 R = C2H5 Alkyl-benzyl-ather2 55% d. Th. R = C6H5 Phenyl-benzyl-ather3 R = CH2-C6Hs Dibenzyl-either ... 

The relative concentrations of several types of hydrocarbon bridges, namely methylene(-CH2-), ethylene(-CH2-CH2-), methyl methylene (-CH(CH3)-), methyl ethylene(-CH(CH3)-CH2-), ethyl methylene (-CH(CH2CH3)-), and propyl methylene (-CH(CH2CH2CH3)-) in the fresh and oxidized San Juan coal are compared in Table... 

Consider 3 possible amines created by replacing hydrogen with the —CH3 methyl group. (See Figure 6-17.)... 

Methyl (4-Heptafluoro-propyl-thio)- ElOb, 608 (I - S-Ar) Methyl 4-Hydroxamino-tetrafluo-ro- E 16a/1, 5f. (F - NH-OH) Methyl 2(or 3- or 4)-Melhyl-ElObj. 330/333 (CF3 - CH3) Methyl 3-(Methyl-lrifiuoromethyl-amino)- ElOa, 389 (CS-Cl -CF3)... 

AMINES. An amine is a derivative of NH3 in which there is a replacement for one or more of the H atoms of Nil, by an alkyl group, such as -CH3 (methyl) or -C2H5 (ethyl) or by an aryl group, such as (>, H (phenyl) or i ll (naphthyl). Mixed amines contain at least one alkyl and one aryl group as exemplified by methylphenylamine CH3 Nnij O.H . When one, two, and three H atoms arc thus replaced, the resulting amines ate known as primary, secondary, and tertiary, icspectively. Thus, methylamine, CH3NH2, is a primary amine dimethylamine, iCHj) NH, is a secondary amine and trimethylamine. (CHs N. is a tertiary amine. Secondary amines sometimes are called imines tertiary amines, nitriles. 

Carboxylic Acids, R—C02H 0 // ch3—c OH ethanoic acid (acetic acid) Esters, R—C02R 0 // ch3—c 0—ch3 methyl ethanoate (methyl acetate) Amides, R—CONH2 P CH3—c nh2 ethanamide (acetamide) ... 

Note how the names of alcohols are obtained by replacing the final e of the name of the parent hydrocarbon by the suffix -ol. Thus, we get ethanol from ethane and methanol from methane. Alcohols can also be named by regarding the hydrocarbon chain as a group attached to the rest of the molecule. To name an alkane as a group, replace the ending by -yl, as in —CH3, methyl, and —CH2CH3, ethyl. Thus, CH,CH2OH is also called ethyl alcohol. 

Complex Temperature (K) Pyrrole-H Phenyl protons o-H m-H p-H CH3 Propyl protons a-CH2 P-CH2 Ethyl protons y-CHj a-CH2 P-CH3 Methyl protons 1 X... 

A1(TPP)CH3 Methyl methacrylate (monomer) Polymethyl methacrylate Solvent benzene, CH2C12 Xlrr > 420 nm 100% conversion can be achieved in the presence of butyl methacrylate a copolymer is formed [115]... 

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