12B Homework, Exams and Quizzes, Old Exams

Homework

Homework 24 (Objective 15: Develop synthesis strategies for organic synthesis.)

Homework 27 (Objective 15: Develop synthesis strategies for organic synthesis.)

Alchemie Mechanisms Homework

There will be 12 graded Alchemie Mechanisms homework assignments this semester.

The Alchemie Mechanisms app costs $9.99 for full access. If you used this app in Chem 12A, don’t pay for it again.

After you download the app (iTunes or Google Play) onto your tablet or phone, click on “sign in” (upper right corner) to create an account. After you verify your e-mail, click on the gear icon (upper left corner) and enter course code: 4mstks

See the Student registration video for help.

NOTES: 1. You have to register to earn credit for doing each Mechanisms homework assignment.

  1. See the Menu (upper left corner) for the Task and Goal for each exercise.
  2. If you try the same thing two or three times and it does not work, this means you are doing something wrong. Try something else.
  3. Three (3) Stars is full credit for each exercise.
  4. You will earn a homework grade for the Mechanisms exercises you do this semester: 12 Homework assignments, 62 puzzles total. If you earn Three (3) Stars full credit for all 62 puzzles, you earn full credit for your Homework grade.
  5. SUGGESTION: Draw the reaction on paper first and try using curved arrows to show how bonds break and form going from reactants to products.
  6. IMPORTANT! Make sure you are able to draw the mechanism on paper for each reaction/puzzle using curved arrows (show bonds breaking and forming) and using a known bond making/breaking process.

Make sure you understand each mechanism for the same reaction type using different reactants. Example: elimination reaction using different reactant and different leaving group to make an alkene.

Homework 1 due Thursday, 1/26/23, noon

  • Objective 1: 12A Review. Identify the structural features, e.g., alpha carbon, and the known bond making/breaking process for each reaction type.
  • Essentials – Structure Exercises 2, 9
  • Essentials – Acid Base Reactions 4, 10
  • Essentials – Addition Reactions 3, 4

Homework 2 due Thursday, 2/2/23, noon

  • Objective 1: Alcohol reactions. Identify the structural features, e.g., alpha carbon, and the known bond making/breaking process for each reaction type.
  • Substitution and Elimination Reactions – Substitution Reactions 8
  • Substitution and Elimination Reactions – Elimination Reactions 5
  • Substitution and Elimination Reactions – Substitution and Elimination Reactions 2, 5
  • Oxygen Functional Groups – Alcohol Reactions 3, 4, 6, 13

Homework 3 due Thursday, 2/9/23, noon

  • Objective 3: Ethers and Epoxides
  • Oxygen Functional Groups – Alcohols Reactions 15, 16, 17

Homework 4 due Thursday, 2/23/23, noon

  • Objective 5: conjugated dienes
  • Essentials – Structure 3, 10

Homework 5 due Thursday, 3/9/23, noon

  • Objective 7: EAS of benzene
  • Pi Systems – Electrophilic Aromatic Substitution Reactions 1, 2, 4, 5, 7, 10, 11

Homework 6 due Thursday, 3/16/23, noon

  • Objective 8: EAS of di and multi-substituted benzenes
  • Pi Systems – Electrophilic Aromatic Substitution Reactions 15, 17

Homework 7 due Thursday, 3/23/23, noon

  • Objective 9: Nu:–addition of O and C Nu:– to C=O compounds
  • Oxygen Functional Groups – Aldehydes and Ketones Reactions 1, 2, 4, 5, 14, 16

Homework 8 due Thursday, 3/30/23, noon

  • Objective 10: Nu:- addition of N Nu:- to C=O compounds
  • Oxygen Functional Groups – Aldehydes and Ketones Reactions 3 (BH4 is a source of H-), 6, 7
  • Essentials – Carbonyl Reactions 4 and 18 (imine), 5 (eneamine)
  • Pi Systems – Triple Bond Reactions 16 (Grignard with nitrile to form imine)

Homework 9 due Thursday, 4/13/22, noon

  • Objective 11: Apply acid-base to organic acids
  • Oxygen Functional Groups – Carboxylic Acids Reactions 1, 2

Homework 10 due Thursday, 4/20/23, noon

  • Objective 12: Nu–acyl substitution of acids and acid derivatives
  • Oxygen Functional Groups – Carboxylic Acids Reactions 3, 4, 5, 7, 8, 9
  • Essentials – Carbonyl Reactions 6 (acyl chloride)
  • Pi Systems – Triple Bond Reactions 12 (nitrile hydrolysis by acid)

Homework 11 due Thursday, 4/27/23, noon

  • Objective 13: enols and enolates, condensation reactions
  • Essentials – Structure 6
  • Oxygen Functional Groups – Aldehydes and Ketones Reactions 8, 9, 10, 13, 17 (Aldol condensation), 18 (Michael addition)
  • Oxygen Functional Groups – Carboxylic Acid Reactions 13, 14, 17 (Claisen condensation)

Homework 12 due Thursday, 5/11/23, noon

  • Objective 14: Organic Synthesis Strategies
  • Pi Systems – Triple Bond Reactions 8 (acetylide ion)

Practice Problems in the 1st and 2nd editions of the Klein, “Organic Chemistry” textbook are numbered the same.

  • Review Ch. 1-12
  • 13/34-37, 39, 43, 48ace, 49adf, 50a, 51, 52bd
  • 14/31, 33, 34, 39, 49, 51bdeglq, 53, 61
  • 15/41, 46, 47, 51, 54, 59, 61
  • 16/31, 32, 34, 46, 51, 55, 56, 62, 64
  • 17/33, 35, 38, 39, 49, 60
  • 18/29, 34, 35, 36, 38, 46, 47, 53, 58, 60
  • 19/43-45, 48, 49, 56, 58, 68, 74, 75
  • 20/54, 56, 60, 63, 66, 75cdefh, 77, 81
  • 21/39, 45, 46, 50, 57, 58, 62, 63, 64, 68, 73abcf, 74
  • 22/59, 60, 63, 71, 73, 76, 78, 79, 87
  • 23/41, 48, 49, 53, 59, 62acd, 81

Quizzes and Multi-Objective Tests

Weekly Quizzes are scheduled every Wednesday (30 minutes between 6 pm and midnight). Quizzes are graded Pass/Not Pass. A Passing grade is 80% or higher. If you do not pass a quiz, you can retake the quiz later.

MOQ 4 and Quizzes 9-11 solutions

MOQ 3 and Quizzes 7-8 solutions

MOQ 2 and Quizzes 4-6 solutions

MOQ 1 and Quizzes 1-3 solutions

Old Exams

Spring 2010

Spring 2012

Spring 2013