Functional Groups Things attached to carbon chains.

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Presentation transcript:

Functional Groups Things attached to carbon chains

Functional Groups Atoms other than hydrogen or carbon covalently bonded to a carbon atom in an organic molecule. Most commonly oxygen, nitrogen, or the halogens. The presence of a functional group drastically changes the chemical properties of a molecule.

Different Functional groups with a 2 carbon chain Ethane- gas (found in natural gas) Ethanol- grain alcohol (drinkable) Ethanoic acid- vinegar Diethyl ether- starting fluid Chloro fluoro ethane (CFC’s used as refrigerants) Ethanal- foul smelling liquid (similar to formaldehyde)

Halogenated Hydrocarbons Hydrocarbons with halogens attached Before the main chain name the halogen as either fluoro, chloro, bromo or iodo and give its number For each halogen subtract 1 H Cl 1,3-dichloro cycloctane C 8 H 14 Cl 2

Practice F 2 fluoro 1 butene C4H7FC4H7F Br 2,5-dibromo 3-ethyl 4-methyl heptane C 10 H 20 Br 2

Alcohols Hydrocarbons with an –OH attached To name it, give it the suffix –(an)ol and the number the OH is attached to Normally you subtract one H from the main group and put an OH on the end (to signify it is an alcohol) OH Ethanol C 2 H 5 OH HOHO 2 propanol Commonly Isopropanol or Rubbing alcohol C 3 H 7 OH

Aldehydes Hydrocarbons with a =O on the outer edge of the chain (most have a foul stench, like formaldehyde or methanal) To name it add the suffix “–al” For the formula subtract 2 H and add O O=O= hexanal C 6 H 12 O =O octanal C 8 H 16 O

Ketones Hydrocarbons with a =O not on the edge of the compound To name it add the suffix “–one” For the formula subtract 2 H and add O O= cyclopropanone C3H4OC3H4O O= 3-nonanone C 9 H 18 O

Carboxylic Acid Hydrocarbons with a –COOH group attached To name it give it the suffix “–oic acid”, the C in the group does count Subtract one C one H and add COOH This group looks like… -C=O OHOH =O OHOH Pentanoic acid C 4 H 9 COOH

Everything so far… Alkanes, alkenes, and alkynes Isomers, halogenated and cyclic Alcohols R-OH *R means any carbon chain -ol Carboxylic Acids R-C=O -OH -oic acid Aldehydes R=OR=O -al Ketones R-C-R =O -one on the end

2,4 dichloro 3 methyl 1 cyclobutanone C 5 H 6 Cl 2 O 2, 3 dimethyl hexanoic acid C 7 H 15 COOH

3 bromo 2, 2 diethyl 1 hexanal C 10 H 19 BrO 2, 2 dibromo 1 cyclohexanol C 6 H 9 Br 2 OH

Large Molecule (ATP)