Question

Draw the condensed structural formula far each of the following compounds. a. 2-nonene b. 2, 3, 4-trimethylpentane c. trans-1-choro-3-ethylcycloheptane d. 4-isopropyloctane e. 1-bromo-2, 2-dimethylbutane f. cis-1-bromo-3-chlorocyclohexane g. g. A compound is incorrectly named 2-ethyl-2, 4-dimethylhexane. Draw the molecule and label with the correct IUPAC name.

Answer 1

4 structure of 2-nonene Explanation: The rootword is non- so the number of carbon atoms in the longest carbon chain must be 9. and a double bond is located at 2nd position structure of 2,3,4-trim ethylpentane Explanati on: The rootword is pent-so the number of carbon atoms in the longest carbon chain must be 5 and three methyl groups are located at 2nd, 3rd and 4th positi ons.

4 structure of trans-1-chloro-3-ethylcycloheptane Explanation: A -Cl group and an ethyl group are located at 1st and 3rd positions on cycloheptane ring and trans to each other structure of 4-isopropyloctane Explanati on: The rootword is oct-so the number of carbon atoms in the longest carbon chain must be 8. An isopropyl group is located at 4th position

4 H3C CH3 structure of 1-bromo-2,2-dimethylbutane Explanati on: The rootword is but-so the number of carbon atoms in the longest carbon chain must be 4. Two methyl groups are located at 2nd position CI structure of cis-1-bromo-3-chlorocyclohexane Explanati on: A-Br group and a -Cl group are located at 1st and 3rd positions on cyclohexane ring and are present on same side.

4 IUPAC name is: 3,3,5-trimethylheptane Explanation: The number of carbon atoms in the longest carbon chain must be 7 so the rootword is hept-. Three methyl groups are located at 3r d and 5th positions so the name is 3,3,5-trimethylheptane