
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Transcribed Image Text:2. Is IR helpful to prove that limonene is optically active? Why or why not?
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3. If a sample is determined to be 75% of the (+) enantiomer, then what is the enantiomeric excess?
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4. An experiment is performed were the specific rotation was determined to be +52° for the resulting
isolation (note this is not the observed rotation). If the enantiomerically pure compound has a literature
rotation of +97°, then what is the percent of each enantiomer in the isolated mixture?
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5. Can you determine the percent R and S from the information given in questions 4? Explain.
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Expert Solution

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Step 1: Introduction of compound
Limonene is a monoterpene compound.
Note ~ Since you have posted multiple questions, we will provide the solution
only to the first question as per our Q&A guidelines. Please repost the
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- Draw all stereoisomers of Limonene using filled and dashes wedgesarrow_forwardces to access question. Draw a structural formula for one of the 5 constitutional isomers of the unbranched alkane C7H16 in which the longest carbon chain has 5 atoms. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one. CH4 {n [ ? ChemDoodleⓇarrow_forwardWhich molecule does not contain a conjugated system?arrow_forward
- Recitation Discussion Problem: USE MOLECULAR MODELS and bring them to recitation. Molecule: 2-methylpentane 1. Draw in bond-line notation. Number all carbons in the pentane backbone. Identify carbons #2 -3. Circle these on your bond-line structure. 2. Draw the Newman projections for all 60° rotations looking down carbons #2-3- starting with the eclipsed conformation. Make sure to keep the front carbon static only rotate the back carbon. Use models. You should draw seven Newman projections in total, 4 eclipsed, 3 staggered. The first and last Newman projections (0° and 360°) are identical. See Karty Chapter 4 for examples. 3. Identify the major interactions occurring in each conformer (which bonds are eclipsed; which have gauche interactions, etc.) and RANK associated energy of eclipsed in terms of size of group. Greater energies are involved for larger eclipsed groups. See Karty Chapter 4 energy diagram examples. 4. Plot these conformations on an Energy Diagram (similar to Karty Figure…arrow_forwardDraw and name two constitutional isomers that have only one stereocenter and are named “ ...ethyl ...hexane”.arrow_forwardDraw and name a constitutional isomer that has two stereocenters and is named a“....tetramethylhexane”.arrow_forward
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