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45 Cards in this Set
- Front
- Back
Alkanes |
Simplest organic molecules. Consist of only C and H atoms held together by single bonds. |
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Four simplest straight chain alkanes |
methane CH4 ethane CH3CH3 propane CH3CH2CH3 butane CH3CH2CH2CH3 |
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Naming longer straight chain alkanes |
Named with greek prefixes for the number of carbon, and end with the suffix, -ane. Ex: pentane, C5H12. Pent=5, hex=6, hept=7, oct=8, non=9, dec=10, undec=11, dodec=12. |
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How are branched-chain alkanes named? |
IUPAC Naming System: 1. Find the longest chain in the compound (carbon backbone), if there are more than 1, use the most highly substituted chain. 2. Number the chain so substituents are low numbers. 3. name substituents 4. Assign number to substituents 5. List substituents in alphabetical order |
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substituents in alkanes |
carbon groups that are not part of the carbon backbone |
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tert-butyl (minus the H on the right side) |
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neopentyl |
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isopropyl |
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sec-butyl |
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isobutyl |
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Rules for completing the name |
1. substituents in alphabetical order w/ numbers 2. prefixes like di-, tri-, or hyphenated prefixes are ignored in alphabetizing 3. prefixes like cyclo-, iso-, and neo-, are considered in alphabetizing 4. commas go between numbers, and hyphens go between numbers and words |
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Cycloalkanes |
alkanes that form rings, named according to number of carbons and have the prefix, cyclo-. |
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dimethyl group |
looks like a wide V branching off of carbon backbone |
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naming cycloalkanes |
same rules are alkanes, carbons are numbered around the ring starting with the point of greatest substitution |
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Alkenes |
AKA olefins; contain C-C double bonds. USe the same naming mechanism but ethylene and propylene are used more often ethene and propene. |
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How is the backbone numbered in alkenes or cycloalkenes? |
Numbered so the double bond is assigned the lowest number possible. If a ring only contains 1 double bond and no substituents, numbers are not necessary. |
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Vinyl- |
monosubsituted ehtylenes (ethenyl) |
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allyl |
propylenes substituted at the C-3 position (2-propenyl-) |
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methylene |
CH2 group on an alkene |
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alkunes |
compounds that possess carbon-carbon triple bonds |
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acetylene |
common name for ethyne |
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haloalkanes |
alkanes that contain a halogen substituent, names include the halogen, halogen should be at lowest possible carbon number |
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alkyl halide |
different way of naming haloalkanes ex: 2-bromo-2-mehtylpropane is called t-butyl bromide |
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Naming alcohols |
-ol replaces the -e of the alkane, and the chain is numbered so the -OH group is assigned the lowest possible number, number priority is always given to the carbon attached to the -OH group. Alternatively, the word alcohol canbe combined with the name of the alkyl group |
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diols |
AKA glycols; have 2 functional groups |
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vicinal diols |
diols with OH groups on adjacent carbons |
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geminal diols |
hydroxyl groups on the same carbon AKA carbonyl hydrates - they are not commonly found because they spontaneously dehydrate |
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Naming ethers |
Named as derivatives of alkanes, larger alkane group is the backbone. Alkoxy- prfix indicates presences of ether (oxy-) and alkyl group. Numbered to give ether the lowest position. |
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cyclic ethers |
Numbering of the ring begins at the oxygen and follows same rules as others |
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oxiranes |
three-membered cyclic-ether ring |
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Simplest oxiranes |
epoxides |
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Naming aldehydes |
named according to the longest chain that contains the aldehyde functional group; -al replaces -e form the alkane; aldehyde group is terminal and recieves the number 1 |
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IUPAC name for formaldehyde |
methanal |
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IUPAC name for acetaldehyde |
ethanal |
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IUPAC name for propionaldehyde |
propanal |
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Naming ketones |
Same as aldehydes, but with -one suffix, carbonyl group assigned lowest number; in complex molecules, the carbonyl group can be named with the prefix oxo-, or the individual alkyl groups can be listed alphabetically followed by the work ketone. |
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Carboxylic acids |
-oic acid replaces the -e. Carboxylic acids are terminal functional groups and are always numbered 1. |
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Amines |
longest chain attached to the nitrogen is the backbone, -amine replaces -e, or the prefix amino- can be used for complex molecules |
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carboxylic acid |
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ester |
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acyl halide |
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Amide |
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nitrile |
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aldehyde |
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ketone |