2.How many stereoisomers do the following molecules have? Please list each usingthe E/Z labeling, separating them with “or” (only E/Z labels, not their full IUPAC names):a)b)c)

A.) Although there are two double bonds, only one can form E and Z isomers. This is because the…

Answered: 2. How many stereoisomers do the…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter6: Alkanes & Alkenes

Section: Chapter Questions

Problem 21E

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1) Provide the name for each structure shown. NO ₂ 2) Draw the structure of the molecule with the following name: a) (1R, 3S)-Cyclopent-4-ene-1,3-diol b) (2R, 3Z)-3-Chloro-2phenylhex-3-enal c) (2E,4Z)-Hepta-2,4,6-trienoic acid d) (3R, 4E)-3-isopropyl-6-oxohex-4-enenitrile H₂C NH CH3 CH3 H₂N CH3
2. Draw the most stable conformation of the following: (a) trans-1-butyl-3-methylcyclohexane (b) trans-1-t-butyl-4-methylcyclohexane Which isomer is more stable? Why?
Ans.
4. What is the IUPAC name of the compound on the right? A) (R)-1-bromo-3-methyl-2-cyclohexene B) (S)-1-bromo-3-methyl-2-cyclohexene C) (R)-6-bromo-2-methylcyclohexene D) (R)-3-bromo-1-methylcyclohexene E) (S)-3-bromo-1-methylcyclohexene Br
5) Use compounds X, Y and Z (shown below) to answer the following questions. H. H3C" "CH3 ОН CH3 compound X compound Y compound Z a) Is compound X classified as cis, trans or neither? b) Is compound Y classified as E, Z or neither? c) Is compound Z classified as R, S or neither? d) Are compounds X and Y constitutional isomers of each other? (YES or NO) e) Are compounds Y and Z constitutional isomers of each other? (YES or NO) f) Classify compound Y as a primary, secondary or tertiary alcohol. g) Which compound(s) is(are) chiral? h) Give the IUPAC name for compound Z, omitting the absolute configuration (R or S) designation. i) In the indicated spaces below, draw stereoisomers of compounds X, Y and Z. stereoisomer of compound X stereoisomer of compound Y stereoisomer of compound Z
Xeljanz is a medication used to treat rheumatoid arthritis. Draw the enantiomer of the molecule shown below. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where applicable. N. N Drawing ZI
For the molecule given, prioritize each substituent on the stereogenic carbon, and assign absolute stereochemistry. Part: 0 / 2 Part 1 of 2 Cl Assign priority to each substituent. -CH,O- - CH3 - CH₂0¹8- - C1 (Choose one) ▼ (Choose one) (Choose one) ▼ (Choose one) ▼ X
9. For the following compound: CI a) Is the alkene an E or Z stereoisomer? b) Provide the IUPAC name (including its E or Z designation) c) Why can't E and Z isomers easily interconvert?
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Draw the planar (Haworth) structure for cis-1-ethyl-2- methylcyclohexane. (b) Draw the two ring - flipped chair conformations. (c) Circle the more stable chair conformation (circle both if they are equal in energy). Draw the Haworth structure and the two ring-flipped conformations of 1, 2, 4- trimethylcyclohexane (Compound D) on the frames below, b) Circle the more stable chair conformation (circle both if they are equal in energy). Haworth Structure
Ketones react with alcohols to yield products called acetals. Why does the all-cis isomer of 4-tert-butyl-1,3-cyclohexanediol react readily with acetone and an acid catalyst to form an acetal, but other stereoisomers do not react? In formulating your answer, draw the more stable chair conformations of all four stereoisomers and the product acetal for each one.
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2. How many stereoisomers do the following molecules have? Please list each using the E/Z labeling, separating them with “or” (only E/Z labels, not their full IUPAC names): a) b) c)