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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8) For each of the pairs of molecules drawn below, place letters in the corner boxes corresponding to all accurate descriptions of the relationship between the two molecules. a) b) c) HO F A enantiomers F all letters that apply H H OH Вад CI all letters that apply all letters that apply B diastereomers C different conformations of the same molecule D identical conformations of the same molecule E constitutional isomers F stereoisomers G different molecules H both are chiral I neither is chiral
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?
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
1
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 minor product
4. Draw the most stable conformation for each of the following substituted cyclohexanes; then, in each case, flip the ring and redraw the molecular in the higher energy chair conformation. Shown all conformation in Newman projections. Fill in hydrogens to indicate unsubstituted carbons. a) b) most stable conformation: higher energy conformation: á most stable conformation: higher energy conformation: 3 Da
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

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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)