CHEM 333 Study Guide - Midterm Guide: Elimination Reaction, Iodine, Electronegativity

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tangerbil959

11 Mar 2017

School

USC, SC, Carolina, South Carolina

Department

Chemistry

Course

CHEM 333

Professor

Shimizu

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Document Summary

Chapter 3 concepts (3. 7-3. 9 and 3. 11-3. 15 in text: conformers, newman projections & their energy (anti and gauche, chair conformations, ring strain, translating molecules in chair conformations, relationship between equilibrium ratios and energy difference (equation, axial and equatorial substituents. Chapter 3 practice questions: draw the newman projection for butane. ***for 6 and 7, use molecular model kit to see substituent positions. Isomerism: chirality, asymmetric carbons (finding chiral centers, r & s nomenclature of asymmetric carbons, determining substituent priority, manipulating chiral centers to put substituent 4 in the back, assigning relationships between molecules. Chapter 5 practice questions: name and define the types of isomers, what is chirality, identify whether the following molecules are chiral or achiral. Chapter 6 practice questions: draw the energy pathways of a sn1 and sn2 reactions. Label transition states: which step is the rate determining step in sn1 reactions, name the factors that speed up or slow down substitution reactions.

Related Questions

Conformational Analysis of Cyclohexane The following exercises can be completed using your lecture text as well as your class notes.

1. Draw both forms of the chair conformation of cyclohexane (right and left facing).

2. Draw a chair conformation of cyclohexane with only the axial hydrogen atoms shown.

3. Draw a chair conformation of cyclohexane with only the equatorial hydrogen atoms shown.

4. Draw the process of ring-flip of cyclohexane. Include both chair conformations and the boat conformation.

5. Draw a Newman projection of cyclohexane as viewed down the C1-C2, C5-C4 bonds.

6. Draw methylcyclohexane as a chair structure. Also show the ring-flip conformation of methylcyclohexane. Label each structure as high and low energy.

7. Draw methylcyclohexane using a Newman projection as viewed down the C1-C2, C5-C4 bonds. Show the ring-flip conformation also using a Newman projection. Label each as high or low energy. Indicate any interactions that are present in each structure (gauche, 1,3-diaxial, etc.)

8. Repeat the directions in exercise 7 for cis-1,2-dichlorocyclohexane.

9. Repeat the directions in exercise 7 for trans-1,2-dichlorocyclohexane.

10. Draw trans-1,3-dimethylcyclohexane using a Newman projection as viewed down the C1-C6, C3-C4 bonds. Show the ring-flip conformation also using a Newman projection. Label each as high or low energy. Indicate any interactions that are present in each structure (gauche, 1,3-diaxial, etc.)

11. Draw cis-1,3-dibromocyclohexane using a Newman projection as viewed down the C1-C6, C3-C4 bonds. Show the ring-flip conformation also using a Newman projection. Label each as high or low energy. Indicate any interactions that are present in each structure (gauche, 1,3-diaxial, etc.)

12. Draw trans-1-isopropyl-3-methylcyclohexane using a Newman projection as viewed down the C1-C6, C3-C4 bonds. Show the ring-flip conformation also using a Newman projection. Label each as high or low energy. Indicate any interactions that are present in each structure (gauche, 1,3-diaxial, etc.)

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CHEM 333 Study Guide - Midterm Guide: Elimination Reaction, Iodine, Electronegativity

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