a trimethyl derivative of pentane. Number the chain in the direction that gives the lowestnumbers to the substituents at the frst point of difference.(d)The longest continuous chain in (CH3)3CC(CH3)3contains four carbon atoms.The compound is named as a tetramethyl derivative of butane; it is2,2,3,3-tetramethylbutane.2.8There are three C5H11alkyl groups with unbranched carbon chains. One is primary, and two are sec-ondary. The IUPAC name of each group is given beneath the structure. Remember to number thealkyl groups from the point of attachment.Four alkyl groups are derived from (CH3)2CHCH2CH3. Two are primary, one is secondary, and oneis tertiary.2.9(b)Begin by writing the structure in more detail, showing each of the groups written in parenthe-ses. The compound is named as a derivative of hexane, because it has six carbons in its longestcontinuous chain.The chain is numbered so as to give the lowest number to the substituent that appears closestto the end of the chain. In this case it is numbered so that the substituents are located at C-2
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