Isomers, An Introduction
Two compounds are considered isomers if they have the same molecular formula (i.e. the same numbers and types of atoms) but different structures.
There are two types of isomers, structural isomers and stereoisomers .
Two compounds are considered structural isomers is they have the same molecular formula but different connections between atoms (bonding).
Two compounds are considered stereoisomers if they have the same molecular formula, the same connections between atoms, but different arrangements of the atoms in three dimensional space.
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