Organic Chemistry Quiz #3 2025

Chapters 4-5

Torsional Strain

when there is repulsion between electrons in bonds that do NOT share an atom. only in eclipsed confirmations

Steric Strain

When there is not enough space and substituents crowd each other out

Angle Strain (Ring Strain)

When bond angles of an atom are less than ideal

Axial Groups

point straight up and down alternating around the ring (chair conformation)

Equatorial Substituents

positioned at angles parallel to the sets of parallel lines making up the chair

Cis Isomers

When two of the same group exist on same sides of the ring

Trans Isomers 

When two of the same group exist on opposite sides of the ring

Enantiomers

two objects that are non-superimposable mirror images of each other. Objects must be chiral!

Diastereomers

Stereoisomers that are not related as object and its mirror image (Ex. Cis and Trans isomers)

Chiral

One tetrahedral atom connected to four unique groups

stereocenter

An atom about which exchange of two groups produces a stereoisomer

Stereoisomer

molecules with the same molecular formula and connectivity but different orientations of their atoms in space