IUPAC Nomenclature (naming organic compounds

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IUPAC Nomenclature:

International Union of pure and Applied chemistry, est 1919

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Linear alkane: parent (or root) name for:
1C
2C
3C
4C
5C
6C
7C
8C
9C
10C

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1C- Methane
2C- Ethane
3C-Propane
4C-Butane
5C- Pentane
6C- Hexane
7C- Heptane
8C- Octane
9C- Nonane
10C- Decane

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Cyclic alkanes: uses prefix Cyclo-

Cyclopropane
Cyclobutane
Cyclopentane

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Rules for IUPAC Nomenclature:

1, Find the longest continuous carbon chain
-Determine the root name
-A a ring with more carbons than the carbon chain takes priority.
-If there are two chains with equal length, use the chain w/greater number of substituents.
2. Number the chain by priority
-1st substituent group gets lowest #
-If a tie--> arrange for sub. group to have the smallest #possible
-If the 1st subs have the same #, number such that the subs has the smaller number.
3.Determine name & position # for each substituent
-include prefix: di, tri, tetra, ect...
4. In alphabetical order, before the root name
-INClude: iso and cyclo-
-Ignore prefixes like sec-, tert-, di, tri,..

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Using IUPC Nomenclature name this molecule

Longest carbon chain 9=nonane
substituents:
6-ethyl
3-methyl
=6-ethyl-3-methyl nonane

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Using IUPC Nomenclature name this molecule

It the Ring has more carbons than the carbon chain, the ring takes priority.
Ring=cyclohexane
substituents:
1-propyl
=1-Propyl Cyclohexane

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Using IUPC Nomenclature name this molecule

Chain with equal amounts of carbon, pick the chain with the most substituents, then # the chain from the side that has most sub.
Longest carbon chain 7=heptane
Substituents:
6-methyl
2-methyl
Note: there is two methyl = dimethyl
4-propyl
3- methoxy (oxygen attached to a carbon)
=>3-methoxy-2,6-dimethyl-4-propyl heptane

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Common alkyl groups:

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replace "ane" ending of alkane name with "yl". Alternate names for complex substituents are given in brackets.


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