Question

Write the molecular formula, IUPAC name, and common name for each cycloalkane. (a) CC(C)CC1CCCC1 (b) CCC(C)C1CCCCCC1 (c) CCC1(C)CC1

Short answer

Question: Determine the molecular formula, IUPAC name, and common name for each given cycloalkane. a) CC(C)CC1CCCC1 b) CCC(C)C1CCCCCC1 c) CCC1(C)CC1 Answer: a) Molecular formula: C8H14 IUPAC name: 1-ethyl-2-methylcyclopentane Common name: 1-ethyl-2-methylcyclopentane (no specific common name) b) Molecular formula: C12H22 IUPAC name: 1-methyl-2-propylcyclohexane Common name: 1-methyl-2-propylcyclohexane (no specific common name) c) Molecular formula: C6H10 IUPAC name: 1-(1-methylpropyl)cyclobutane Common name: 1-(1-methylpropyl)cyclobutane (no specific common name)

Step-by-step solution

a) Determine the molecular formula, IUPAC name, and common name for CC(C)CC1CCCC1

Molecular formula: Count the total number of carbon and hydrogen atoms in the structure. There are 8 carbon and 14 hydrogen atoms, making the molecular formula C8H14. IUPAC name: Identify the largest ring in the structure, which contains 5 carbon atoms. This is a cyclopentane, and the remaining alkyl groups are attached to it as substituents. There is a two-carbon chain (ethyl) and a one-carbon chain (methyl) attached to the cyclopentane. The IUPAC name is 1-ethyl-2-methylcyclopentane. Common name: There is no specific common name for this cycloalkane, so we use the IUPAC name as the preferred name.

b) Determine the molecular formula, IUPAC name, and common name for CCC(C)C1CCCCCC1

Molecular formula: Count the total number of carbon and hydrogen atoms in the structure. There are 12 carbon and 22 hydrogen atoms, making the molecular formula C12H22. IUPAC name: Identify the largest ring in the structure, which contains 6 carbon atoms. This is a cyclohexane, and the remaining alkyl groups are attached to it as substituents. There is a three-carbon chain (propyl) and a one-carbon chain (methyl) attached to the cyclohexane. The IUPAC name is 1-methyl-2-propylcyclohexane. Common name: There is no specific common name for this cycloalkane, so we use the IUPAC name as the preferred name.

c) Determine the molecular formula, IUPAC name, and common name for CCC1(C)CC1

Molecular formula: Count the total number of carbon and hydrogen atoms in the structure. There are 6 carbon and 10 hydrogen atoms, making the molecular formula C6H10. IUPAC name: Identify the largest ring in the structure, which contains 4 carbon atoms. This is a cyclobutane. The remaining carbon atom is attached as a substituent in the form of a one-carbon chain (methyl), and there is a three-carbon chain (propyl) attached to the substituent carbon. The IUPAC name is 1-(1-methylpropyl)cyclobutane. Common name: There is no specific common name for this cycloalkane, so we use the IUPAC name as the preferred name.