Chem 140A ternansky Midterm-2 Fall 07-Blank

Chem 140A ternansky Midterm-2 Fall 07-Blank - represent...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 140A TOTAL POSSIBLE: 150 Fall, 2007 POINTS MISSED: - 0 Second Midterm Exam-150 points 11/28/07 TOTAL: 150 DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO. ....FILL OUT THE FOLLOWING INFORMATION NOW : . YOUR NAME (Print): Ima Key PID: _________________________________________________ SIGNATURE: _________________________________________ ID checker initials: ____________________ If you wish to have any answers considered for a re-grade, your exam must be completed in INK .
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1. (15 points) For the following chiral compounds, designate the chirality at the chiral center by circling “R” or “S” below the molecule. 2. (15 points) For the following compounds, indicate if they are meso or chiral by circling the appropriate response below each molecule.
Background image of page 2
3. (36 points) On the template labeled “A” below, draw the structure of ( 1S, 2S, 3S )- 1-Ethyl-2-iodo-3-methylcyclohexane. Use “Et” to represent ethyl and “Me” to
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: represent methyl. Also, draw the same compound on the chair template labeled B. Next, draw the ring-flipped chair of B on the template labeled C. The molecule above is treated with two equivalents of lithium diisopropylamide in diethyl ether at -78 o C. On the template D below, draw the major organic product of this reaction. Be sure to use dashes and wedges to indicate stereochemistry. 4. (46 points) In the box provided, draw the MAJOR organic product predicted for the following reactions. If no reaction is expected, write NR in the box. Where requested, write the appropriate mechanism for the formation of this product. Be sure to SPECIFY THE CHIRALITY OF THE PRODUCT with dashes/wedges. 5. (38 points) In the boxes provided, supply the reagents and solvents required to accomplish the following transformations. Number the steps in the order they must occur....
View Full Document

Page1 / 5

Chem 140A ternansky Midterm-2 Fall 07-Blank - represent...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online