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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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![### Educational Exercise: Evaluating Alkenes
#### Question:
Which one of these depictions of alkenes is **not acceptable** as it has an impossible geometry and/or it is impossible to determine the configuration (e.g., E vs. Z) of the alkene? Select all that apply.
#### Alkenes Depictions:
1. **Molecule 1:**
- Structure: A simple alkene with one CH₃ group and one H atom on each end of the double bond.
- Visual Format: Planar layout without any stereochemistry indicators (wedges or dashes).
2. **Molecule 2:**
- Structure: Contains stereochemical markers with a dashed bond on one side of the double bond and a wedged bond on the opposite side, suggesting conflicting stereochemistry.
- Visual Format: Has CH₃ groups, with one depicted using a dashed line, and another using a wedged line on different carbon atoms, leading to potential geometric inconsistencies.
3. **Molecule 3:**
- Structure: An alkene with stereochemical indicators, one bond is wedged and the other is dashed.
- Visual Format: A CH₃ group is shown with a wedged bond on one carbon, and an H with a dashed bond on the other carbon, implying a valid stereochemistry arrangement.
4. **Molecule 4:**
- Structure: A straightforward depiction with CH₃ and H atoms on opposite sides of the double bond.
- Visual Format: No stereochemistry indicators are present, simplifying the interpretation as a planar structure.
#### Options:
- [ ] 1
- [ ] 2
- [ ] 3
- [ ] 4
Carefully analyze each structure and identify which depiction(s) do not conform to correct stereochemical practice or possess geometrical impossibilities. Select the option(s) above that are not acceptable based on the provided alkenes' configurations.](https://content.bartleby.com/qna-images/question/8f1d841c-a10a-4168-abf8-9112a54412b6/ce5dbc7a-7b75-4561-b851-3da0721a814a/uxp1l5_thumbnail.png)
Transcribed Image Text:### Educational Exercise: Evaluating Alkenes
#### Question:
Which one of these depictions of alkenes is **not acceptable** as it has an impossible geometry and/or it is impossible to determine the configuration (e.g., E vs. Z) of the alkene? Select all that apply.
#### Alkenes Depictions:
1. **Molecule 1:**
- Structure: A simple alkene with one CH₃ group and one H atom on each end of the double bond.
- Visual Format: Planar layout without any stereochemistry indicators (wedges or dashes).
2. **Molecule 2:**
- Structure: Contains stereochemical markers with a dashed bond on one side of the double bond and a wedged bond on the opposite side, suggesting conflicting stereochemistry.
- Visual Format: Has CH₃ groups, with one depicted using a dashed line, and another using a wedged line on different carbon atoms, leading to potential geometric inconsistencies.
3. **Molecule 3:**
- Structure: An alkene with stereochemical indicators, one bond is wedged and the other is dashed.
- Visual Format: A CH₃ group is shown with a wedged bond on one carbon, and an H with a dashed bond on the other carbon, implying a valid stereochemistry arrangement.
4. **Molecule 4:**
- Structure: A straightforward depiction with CH₃ and H atoms on opposite sides of the double bond.
- Visual Format: No stereochemistry indicators are present, simplifying the interpretation as a planar structure.
#### Options:
- [ ] 1
- [ ] 2
- [ ] 3
- [ ] 4
Carefully analyze each structure and identify which depiction(s) do not conform to correct stereochemical practice or possess geometrical impossibilities. Select the option(s) above that are not acceptable based on the provided alkenes' configurations.
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- 4 Practice 2 3-9 4.8 Conformational Analysis of Butane The graph below represents the relative energies of the conformations of butane: ww B Relative energy -1- —— 0° 60° 120° 180° 240° 300° 360° Angle of rotation Select the Newman projection that corresponds with position C on the graph (an angle of rotation of 120 degrees). HA 3 H I I I I # CH3 CH 3 CH 3 CH3 -I H HH CH3 CH3 CH3 80⁰0 CH3 H I I Н 4 000 000 % 6 MacBook Air 7 8 DIL FB 9 0arrow_forwardChoose all compounds shown below (A-F) that can exist as pairs of cis-trans isomers: CH3CH2CH=C(CH3)2 CH3CH=C(CH3)CH2CH3 BrCH=CHCI CH2=CHCH3 C B D A OA Ов C D ОЕ OF BrCH2CH=CHCH2Br CH3CH=C(CH2CH3)2 E Farrow_forwardS J G AUC 5 O F5 100000 A 6 BOOOOO C) 4 What is the proper IUPAC name for the structure shown below? NH₂ Y H Use proper IUPAC syntax with dashes (between number and letters) and commas (between numbers) as shown in the Tutorial. There should be no spaces in an IUPAC name and we do not use capital letters. Place your answer in the box. MacBook Air C tv F6 & 7 F7 U J * 00 IJZA @ DII F8 K ( O F9 0 ) L A F10 P | ' F11 { [ 11 + = 11 6-0170 F12 1arrow_forward
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