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Which one of these depictions of alkenes is not acceptable as it is an impossible geometry and/or it is impossible to determine the configuration (e.g. E vs. Z) of the alkene? Select all that apply. CH3 H H CH3 CH3 H H X X I b H₂C H₂C H CH3 CH3 1 2 3 4

Which one of these depictions of alkenes is not acceptable as it is an impossible geometry and/or it is impossible to determine the configuration (e.g. E vs. Z) of the alkene? Select all that apply. CH3 H H CH3 CH3 H H X X I b H₂C H₂C H CH3 CH3 1 2 3 4

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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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.
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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