ORGANIC CHEMISTRY- isomerism Flashcards
1
Q
what is an isomer?
A
Isomers are compounds with the same molecular formula but different structures.
2
Q
what are structural isomers?
A
molecules with the same molecular formula but a different structure.
3
Q
what are stereoisomers?
A
molecules with the same structural formula but a different spacial arrangement of atoms.
4
Q
what is chain isomerism?
A
- change of arrangement in carbon skeleton
- similar chemical properties
- slightly different physical properties
- different structural formulas
5
Q
what is positional isomerism?
A
- each molecule has same carbon skeleton
- each molecule has same functional group BUT the functional group is in a different position
- similar chemical properties
- different physical properties
6
Q
what is functional group isomersim?
A
- molecules has same molecular formula
- molecules have different functional groups
- diff chemical + physical properties
7
Q
what are E/Z isomers?
A
They are caused by molecules with a C=C with two different groups attached to each C of the C=C
8
Q
what does E in E/Z isomer stand for?
A
E is when the high and low priority functional groups are opposite each other
9
Q
what does Z in E/Z isomer stand for?
A
when the highest priority are on the ‘Zame side’
