L1 /
2
CH1012
ISOMERS
• Isomers are molecules with the same mol. formula but with different structures.
• Geometric Isomers in unsaturated compounds - the position of
groups about the double bond
varies between two isomers.
groups about the double bond
varies between two isomers.
• Positional arrangement of highest
priority substituents across a double
bond; or opposite sides of a ring.
priority substituents across a double
bond; or opposite sides of a ring.
• Priority is based on the atomic number of each
substituent. You compare each group
and look for where they differ. Where they
differ you compare the atomic number.
and look for where they differ. Where they
differ you compare the atomic number.
