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Definitions
Various Definitions
29
Chemistry
Undergraduate 4
08/25/2011

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Term
Alkene
Definition
A hydrocarbon that contains a double bond.
Term
Alkane
Definition
A Hydrocarbon that contains only single bonds.
Term
SP3 Hybridization
Definition
S, P, P, P Orbitals Used

4 Hybrid Orbitals Formed

Tetradhedral Geometry
Term
SP2 Hybridization
Definition
S, P, P Orbitals Used

3 Hybrid Orbitals Formed

Flat Triangular Geometry
Term
SP Hybridization
Definition
S, P Orbitals Used

2 Hybrid Orbitals Formed

Linear Geometry
Term
Tetrahedral Intermediate
Definition
The result of a nucleophile attacking the carbonyl carbon of a carboxylic acid derivative, the weakest bond in the molecule - the carbon-oxygen PI bond - breaks.
Term
Nucleophilic Acyl Substitution Reaction
Definition
When a nucleophile (Z-) has replaced the substituent (Y-) that was attached to the acyl group in the reactant.
Term
Carboxylic Acid Derivative
Definition
Carboxylic Acid that has its OH group replaced.

Acyl Chlorides (Cl),
Esters (OR'), and
Amides (NH2, NHR', and NR'2).
Term
Electrophile
Definition
An electron-deficient atom or molecule
Term
Nucleophile
Definition
An electron-rich atom or molecule
Term
Hydrolysis Reaction
Definition
A reaction with water that converts one compound into two compounds. (Lysis is Greek for "breaking down")
Term
Alcoholysis Reaction
Definition
A reaction with alcohol that converts one compound into two compounds.
Term
Transesterification Reaction
Definition
One ester is converted to another ester.
Term
Catalyst
Definition
A substance that increases the rate of reaction without being consumed or changed in the overall reaction.
Term
Fats and Oils
Definition
Triesters of glycerol.
Term
Soap
Definition
Sodium or potassium salts of fatty acids, obtained when fats or oils are hydrolyzed under basic conditions.
Term
Saponification
Definition
The hydrolysis of an ester in a basic solution.
Term
Fatty Acids
Definition
Unbranched, long-chain carboxylic acids obtained from fats.
Term
Micelle
Definition
Large, spherical clusters of long-chain carboxylate ions.
Term
Detergents
Definition
Salts of benzenesulfonic acids, developed as "synthetic soap" to avoid aggregates forming in high concentrations of calcium and magnesium.

In other words, so it doesn't form soap scum in hard water.
Term
Fischer Esterification
Definition
Preparation of an ester by reacting a carboxylic acid with an alcohol in the presence of an acid catalyst.
Term
Nitrile
Definition
Compounds that contain a C=-N Functional group.
Term
Class I Carbonyl Compound
Definition
Compounds which have a group that can be replaced by a nucleophile.
Term
Class II Carbonyl Compound
Definition
Aldehydes and Ketones
Term
Aldehyde
Definition
A compound in which the carbonyl carbon is bonded to a hydrogen and to an alkyl (or aryl) group.
Term
Ketone
Definition
A compound in which the carbonyl carbon is bonded to two alkyl (or aryl) groups.
Term
Nucleophilic Addition
Definition
The result of adding a ketone or an aldehyde to a nucleophile.
Term
Reduction Reaction
Definition
The addition of hydrogen to an organic compound.
Term
Imine
Definition
A compound with a carbon-nitrogen double bond.
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