Lecture 9 - Lecture 9 Organic Chemistry I Prof. Jonathan L....

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Organic Chemistry I 310/318M Pre-Health Professionals Unique numbers: 54410, 54435, 54440, 54445, and 54655 Prof. Jonathan L. Sessler Lecture 9 Note: Homework 2 will be due on the 24th, not today.
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Nomenclature - IUPAC •S u f f i x - ane ane specifies an alk ane ane , e.g. ethane. • Prefix tells the number of carbon atoms. undec- dodec- tetradec- pentadec- hexadec- heptadec- nonadec- eicos- tridec- 11 12 13 14 15 16 17 octadec- 18 19 20 Prefix meth- eth- prop- but- pent- hex- oct- non- dec- 1 2 3 4 5 6 7 hept- 8 9 10 Number of carbons Prefix Number of carbons
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Nomenclature - IUPAC Parent name: Parent name: The longest carbon chain. Substituent Substituent : : A group bonded to the parent chain. – Alkyl group Alkyl group : A substituent derived by removal of a hydrogen from an alkane; given the symbol R- . Alkane Alkyl group CH 4 Name Name Methane 3 - Methyl group 3 3 Ethane 3 2 - Ethyl group
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Nomenclature - IUPAC 1.The name of a saturated hydrocarbon with an unbranched chain consists of a prefix and suffix. 2. The parent chain is the longest chain of carbon atoms. 3. Each substituent is given a name and a number. Use a hyphen to connect the number to the name. 4. If there is one substituent, number the chain from the end that gives it the lower number. CH 3 CH CH 3 3 2-Methylpropane 1 2 3 3 2 2 CHCH 3 3 2-Methylpentane 1 2 3 4 5 5 4 3 2 1 (not 4-methylpentane)
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Nomenclature - IUPAC 5. If there are two or more identical substituents, number the chain from the end that gives the lower number to the substituent encountered first.
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This note was uploaded on 09/19/2008 for the course CH 310M taught by Professor Iverson during the Fall '05 term at University of Texas at Austin.

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Lecture 9 - Lecture 9 Organic Chemistry I Prof. Jonathan L....

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