unit (7) organic compounds

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Worked Example 7-4Name the following alkane:CH 3CH 3CH 3 - CH - C - CH 2 - CH- CH 2 -CH 3CH 3 CH 3Solution1. The longest continuous chain contains seven carbon atoms (heptane).2. There are four methyl groups on the chain. Two methyl groups are on carbon 3,one CH 3 on carbon 2, and one CH 3 on carbon 5.3. The correct name is 2,3,3,5-tetramethylheptane.III) An Alkane With More Than One BranchWhere Branches Are Different1. Determine the name of the parent chain, the longest continues carbon chain in thealkane.2. The parent chain is numbered from the end nearer the first alkyl group. Give eachalkyl group a name and a number. Use hyphens to separate numbers from words; usecommas to separate numbers. If different alkyl groups are present, write them inalphabetical order. If necessary, use one of the prefixes di-, tri-, tetra-, and so forth,but don’t use them for alphabetizing purposes.3. Write the name as single word.Worked Example 7-5Name the following alkane:SolutionCH 2 CH 3CH 3 - CH - CH - CH- CH 2 - CH 2 -CH 3CH 3 CH 31. The longest continuous chain contains seven carbon atoms (heptane).2. There are three branches. Two methyl groups on carbon 2 and 3; one ethylgroup on carbon 4. Write the alkyl groups in alphabetical order (ethyl beforemethyl).3. The correct name is 4-ethyl-2,3-dimethylheptane.7-8
Practice 7-2Name each the following <strong>compounds</strong>:a)Answerc)CH 3CH 2 - CH -CH 2 CH 3CH 2 - CHCH 3CH 3CHCHCHCH 3CH 3 - 3b) CH 3 CH 2 2 CH 3CH 3 CH 2 CHCHCH 2 CHCH 2 CH 2 CH 3CH 3a) 3-methylpentaneb) 3,4-dimethylhexanec) 3-ethyl-4,6-dimethylnonanePractice 7-3Draw structure for each of the following <strong>compounds</strong>:a) 3-ethyl-2-methylhexane b) 2,2,5-trimethylheptanec) 4,6-diethyl-6-methylnonane d) 4-ethyl-4-isopropyloctaneAnswerCH 3CH 3CH 2 CH 3a) CH 3 - CH - CH -CH 2 - CH 2 - CH 3 b) CH 3 - C - CH 2 -CH 2 - CH - CH 2 - CH 3CH 3 CH 3c)CH 2 CH 3CH 3CH 3 - CH 2 - CH 2 -CH - CH 2 - C - CH 2 - CH 2 - CH 3CH 2 CH 3CH 3 CHCH 3d) CH 3 - CH 2 - CH 2 -C - CH 2 - CH 2 - CH 2 - CH 3CH 2 CH 37-9
Page 6 and 7: Worked Example 7-2Draw all structur
Page 10 and 11: 7.5 CycloalkanesA cycloalkane is an
Page 12 and 13: 2. Halogenation is a reaction betwe
Page 14 and 15: Practice 7-5Give the IUPAC name for
Page 16 and 17: 7.10 Reactions of AlkenesThe most c
Page 18 and 19: The word aromatic originally referr
Page 20: 7.5 Write equations for the reactio

unit (7) organic compounds

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