O-Chem Lecture #9

O-Chem Lecture #9 - Chapter 5 Organic Chemistry Isomers...

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Chapter 5 Organic Chemistry Isomers – compounds with the same molecular formula but different structures Constitutional isomers – differ in the way their atoms are connected Stereoisomers (configuration isomers) – differ in the way their atoms are arranged in space Cis Trans Isomers – result from restricted rotation which can be either a double bond, or by a cyclic structure Chiral – nonsuperimposable mirror images Molecules can be chiral, and the usual cause is because the molecule has an asymmetric center. Asymmetric center – atom is bonded to four different groups Only sp 3 carbons can be asymmetric centers Enantiomers – molecules that are nonsuperimposable mirror images of each other Stereocenter (stereogenic center) – an atom which can interchange two groups to produce a stereoisomer. o Includes a asymmetric center o Sp 2 carbons an alkene or the sp 3 of a cyclic compound can interchange cis or trans o Means all asymmetric centers are sterocenters
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This note was uploaded on 10/31/2011 for the course CHEM 109A 1A taught by Professor Bruice during the Spring '11 term at UCSB.

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O-Chem Lecture #9 - Chapter 5 Organic Chemistry Isomers...

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