1
Stereoisomerism
and
Chirality
Chapter 3
Chapter 3
Isomers
Isomers
Isomers:
different compounds with the same
molecular formula
Constitutional isomers:
isomers with a different
connectivity
Stereoisomers
Stereoisomers:
isomers with the same
connectivity but a different orientation of their
atoms in space
Chirality
Chiral
Chiral:
from the Greek,
cheir
,
hand
•
an object that is not superposable on its mirror image
Chirality
Chirality
Achiral
Achiral:
an object that lacks chirality; one that
lacks handedness
•
an achiral object has at least one element of symmetry
•
plane of symmetry:
an imaginary plane passing
through an object dividing it so that one half is the
mirror image of the other half
•
center of symmetry:
center of symmetry:
a point so situated that identical
components are located on opposite sides and
equidistant from that point along the axis passing
through it
Elements of Symmetry
Symmetry in objects
Symmetry in objects
Elements of Symmetry
Elements of Symmetry
Symmetry in objects
Symmetry in objects

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