4.1.1 Isomerism Flashcards
What are structural isomers
Molecules that have the same molecular formula but different structural formula
What’s isomerism
What occurs due to differences in structure
3types of structural isomerism
Chain isomerism
Positional isomerism
Functional group isomerism
Whats chain isomerism
The isomerism that occurs due to differences in chain length and branching
Due to different chain lengths what can something with the same molecular formula have different
Structural formula
What do chain isomers have that differs
E.g
Physical properties
Boiling point (longer chain more surface area molecules will have for forces so stays as liquid at higher temperatures even though have sa,e molecular mass)
What’s boiling point like in a molecule with more ranches
Why
Lower
As molecule is more compact so surface area is lower
3 other names for inter molecular forces
Van der waals
Induced dipole-dipole interactions
London forces
What’s positional isomerism
Same functional group attached to main chain at different points
What’s functional group isomerism
Isomerism that happens due to differences in functional groups
What’s the same in functional group isomerism while functional groups differ
Same molecular formula
Aliphatic
Compound joined together in straight chains, branched chains/non-aromatic rings
Alicyclic
Aliphatic compound arranged in non-aromatic rings with/without side chains
Aromatic
Compound containing a benzene ring