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12 Cards in this Set
- Front
- Back
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Chain isomerism
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Chain isomers differ only in strucure of C skeleton. Same chemical properties, different physical properties
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Positional isomerism
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Same functional group at different position on same C skeleton. Properties: similar chemical; different physical
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Functional group isomerism
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Different functional groups. Different chemical and physical properties
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Stereoisomerism
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Cis-Trans and optical isomerism
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Cis-trans isomerism
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Restricted rotation in C=C.
2 different substituents are attached to each C. Same chemical but different physical properties |
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Priority for cis-trans
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Atom directly attached to C=C
Rank according to atomic no Higher atomic no=high prio |
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Cis-trans isomers
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Cis (Z) on same side
Trans (E) on different side |
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Why do cyclic cpds exhibit Cis-trans isomerism?
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Atoms joined in a ring are not free to rotate around the sigma bonds of the ring.
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Optical isomerism
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Exists for chiral molecules
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Chirality?
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Objects that can't be superimposed on their mirror image
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Enantiomers
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Pair of non-superimposable mirror images
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What is a chiral carbon?
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A sp3 hybridized carbon atom which has 4 different atoms/groups attached to it
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