Confirmations Flashcards
Define confirmations
The confirmations of a molecule are the different possible arrangements in space of the atoms , that are interconvertible and due to rotation around single bonds.
What is the goal of the different confirmations?
To have the atoms (and hence electrons) as far apart as possible.
Why is staggered more stable than eclipsed?
The staggered has the atoms further away than eclipsed.
Pitzer Strain is when the electrons repel
Steric strain is repulsion between close groups
Rank Gauche, antistaggered, and syn eclipsed in order from most to least stable
Antistaggered, gauche, Syn eclipsed
What is the CHAIR conformation?
The most stable confirmation of cyclohexane. 6 hydrogens are axial, they have vertical bonds. 6 are equatorial, they are horizontal.
What is the BOAT conformation?
A less stable confirmation of cyclohexane. All hydrogens are vertical (flagpole)
What happens when converting from chair, to boat, to chair again?
Axial and equatorial hydrogens swap place
Why are substituent groups more stable in the equatorial position?
They have more room. In axial, the substituent interacts with the other hydrogens
