National University of Lesotho DEPARTMENT OF CHEMISTRY & CHEMICAL TECHNOLOGY C2730 Organic Chemistry I Assignment 1 Marks:40 March 2025 due date: 17/03/25 1. Draw structures for all isomeric cycloalkanes of molecular formula C6H12. 2. [7] for the following molecules; Write the IUPAC (systematic) names for the [4] CH2CH3 (i) CH3 CH3CH2-C-CH2CH2-CH-CHCH2CH2CH3 ii) CH2CH3 CH2CH3 iii) iv) (CH3CH2)3CCH(CH3)CH2CH2CH3 3. Draw and name molecules that meet the following descriptions; [4] a) An organic molecule containing 2 sp² hybridised carbon and 1 sp-hybridised carbon atom. b) A cycloalkene, CH12, with a tetrasubstituted double bond. 4. Arrange the following organic molecules; i) in order of increasing acidity, starting with the least acidic. [2] CH3CH3, HC=CH and CH2=CH2 ii) in order of increasing boiling point. [2] 3-methylpentane, n-hexane, and 2,3-dimethylbutane 5. Draw the most stable chair conformation of 1-ethyl-1-methylcyclohexane, clearly showing the axial and equatorial substituents. [4] 1

National University of Lesotho DEPARTMENT OF CHEMISTRY & CHEMICAL TECHNOLOGY C2730 Organic Chemistry I Assignment 1 Marks:40 March 2025 due date: 17/03/25 1. Draw structures for all isomeric cycloalkanes of molecular formula C6H12. 2. [7] for the following molecules; Write the IUPAC (systematic) names for the [4] CH2CH3 (i) CH3 CH3CH2-C-CH2CH2-CH-CHCH2CH2CH3 ii) CH2CH3 CH2CH3 iii) iv) (CH3CH2)3CCH(CH3)CH2CH2CH3 3. Draw and name molecules that meet the following descriptions; [4] a) An organic molecule containing 2 sp² hybridised carbon and 1 sp-hybridised carbon atom. b) A cycloalkene, CH12, with a tetrasubstituted double bond. 4. Arrange the following organic molecules; i) in order of increasing acidity, starting with the least acidic. [2] CH3CH3, HC=CH and CH2=CH2 ii) in order of increasing boiling point. [2] 3-methylpentane, n-hexane, and 2,3-dimethylbutane 5. Draw the most stable chair conformation of 1-ethyl-1-methylcyclohexane, clearly showing the axial and equatorial substituents. [4] 1

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter2: Alkanes And Cycloalkanes

Section: Chapter Questions

Problem 2.46P

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