Question

(ch3)3 c ch2 br + benzene​

Answer 1

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♦CH3(CH2)2CH(CH3)CH2CH3

♦♦When viewing a condensed formula of this kind, one must recognize that parentheses are used both to identify repeating units, such as the two methylene groups on the left side, and substituents, such as the methyl group on the right side. This formula is elaborated and named as follows....

♦The condensed formula is expanded on the left.

♦ By inspection, the longest chain is seen to consist of six carbons, so the root name of this compound will be hexane

♦. A single methyl substituent (colored red) is present, so this compound is a methylhexane. The location of the methyl group must be specified, since there are two possible isomers of this kind.

♦ Note that if the methyl group were located at the end of the chain, the longest chain would have seven carbons and the root name would be heptane not hexane. To locate the substituent the hexane chain must be numbered consecutively, starting from the end nearest a substituent. In this case it is the right end of the chain, and the methyl group is located on carbon #3. The IUPAC name is thus: 3-methylhexane.....