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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.

Four simplest straight chain alkanes

methane CH4


ethane CH3CH3


propane CH3CH2CH3


butane CH3CH2CH2CH3

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.

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







substituents in alkanes

carbon groups that are not part of the carbon backbone


tert-butyl (minus the H on the right side)

neopentyl

isopropyl

sec-butyl

isobutyl

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



Cycloalkanes

alkanes that form rings, named according to number of carbons and have the prefix, cyclo-.

dimethyl group

looks like a wide V branching off of carbon backbone

naming cycloalkanes

same rules are alkanes, carbons are numbered around the ring starting with the point of greatest substitution

Alkenes

AKA olefins; contain C-C double bonds. USe the same naming mechanism but ethylene and propylene are used more often ethene and propene.

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.

Vinyl-

monosubsituted ehtylenes (ethenyl)

allyl

propylenes substituted at the C-3 position (2-propenyl-)

methylene

CH2 group on an alkene

alkunes

compounds that possess carbon-carbon triple bonds

acetylene

common name for ethyne

haloalkanes

alkanes that contain a halogen substituent, names include the halogen, halogen should be at lowest possible carbon number

alkyl halide

different way of naming haloalkanes


ex: 2-bromo-2-mehtylpropane is called t-butyl bromide

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

diols

AKA glycols; have 2 functional groups

vicinal diols

diols with OH groups on adjacent carbons

geminal diols

hydroxyl groups on the same carbon


AKA carbonyl hydrates - they are not commonly found because they spontaneously dehydrate

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.

cyclic ethers

Numbering of the ring begins at the oxygen and follows same rules as others

oxiranes

three-membered cyclic-ether ring

Simplest oxiranes

epoxides

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

IUPAC name for formaldehyde

methanal

IUPAC name for acetaldehyde

ethanal

IUPAC name for propionaldehyde

propanal

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.

Carboxylic acids

-oic acid replaces the -e. Carboxylic acids are terminal functional groups and are always numbered 1.

Amines

longest chain attached to the nitrogen is the backbone, -amine replaces -e, or the prefix amino- can be used for complex molecules

carboxylic acid

ester

acyl halide

Amide

nitrile

aldehyde

ketone