ORG CHEM HELP Newman Confirmations Help
Posted: Thu Apr 01, 2021 5:51 pm
Help me please!
Recall that in the Newman projection of ethane, there are no substituents (non-hydrogens) on either carbon. As a result, there are only 2 conformations: Staggered and Eclipsed. For the Newman projection of propane, sighting along the C2-C3 bond, there is 1 substituent on the front carbon: a methyl group. This still results 2 conformations: Staggered and Eclipsed. In butane, sighting along the C2-C3 bond, there are now 2 methyl substituents with 1 on each carbon. This results in 4 possible conformations: Staggered-Anti, Staggered-Gauche, Eclipsed 1, and Eclipsed 2.
QUESTIONS:
1. What if there were more than 2 substituents?
2. Consider 2-fluorobutane, sighted along the C2-C3 bond. Name the substituents on C2 and C3. Draw all the different Newman conformations. Finally, rank them from most stable to least stable.
Thank you!
Recall that in the Newman projection of ethane, there are no substituents (non-hydrogens) on either carbon. As a result, there are only 2 conformations: Staggered and Eclipsed. For the Newman projection of propane, sighting along the C2-C3 bond, there is 1 substituent on the front carbon: a methyl group. This still results 2 conformations: Staggered and Eclipsed. In butane, sighting along the C2-C3 bond, there are now 2 methyl substituents with 1 on each carbon. This results in 4 possible conformations: Staggered-Anti, Staggered-Gauche, Eclipsed 1, and Eclipsed 2.
QUESTIONS:
1. What if there were more than 2 substituents?
2. Consider 2-fluorobutane, sighted along the C2-C3 bond. Name the substituents on C2 and C3. Draw all the different Newman conformations. Finally, rank them from most stable to least stable.
Thank you!