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SMT 301
N/A
29
Other
Undergraduate 3
02/11/2014

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Term
atom
Definition
the smallest particle of a chemical element, consisting of a positively charged nucleus surrounded by negatively charged electrons.
Term
molecule
Definition
a group of atoms chemically bonded together, representing the smallest fundamental unit of a compound that can take part in a chemical reaction.
Term
Dispersion Forces
Definition
Random electron motion produces temporary dipole in one molecule. Temporary dipole induces dipole in adjacent molecules. Presence of induced dipoles results in intermolecular interaction. Most common between different molecules. Typically increases with molecular size
Term
Dipole-dipole Forces
Definition
Interaction between centers of opposite charge in polar molecules. Electronegativity differences between atoms in molecule produce charges in the atoms. If centers of positive and negative charge within the molecule do not coincide, the molecule is polar
Term
Hydrogen Bonding
Definition
Especially strong case of dipolar interaction in compounds with N-H, O-H, or F-H bonds.
Term
Electronegativity
Definition
The electronegativity of an atom is defined as a measure of its ability to attract electrons.
Term
Surface tension
Definition
Measure of energy required to increase a liquid's surface area
Term
Hydrocarbon
Definition
Organic compound consisting only of C and H atoms
Term
Alkanes
Definition
Simplest of organic compounds. Also called saturated hydrocarbons. All bonds are single covalent bonds and carbon backbone saturated with as many H atoms as it can possibly hold.
Term
Physical properties of Alkanes
Definition
Longer chains yield higher boiling point and density. All the alkanes are insoluble in water. All the alkanes are lighter than water.
Term
CH3
Definition
Methyl
Term
CH2CH3
Definition
ethyl
Term
CH3CH2CH2
Definition
n-propyl
Term
CH3CHCH3
Definition
isopropyl
Term
Structural Isomers
Definition
Same molecular formula but differ in connectivity of the atoms
Term
Geometric isomers
Definition
Same connectivity but differ in spatial arrangement of the atoms
Term
Enantiomer
Definition
Molecules that are non-superimposable mirror images. Definition: stereocenter is a carbon atom with four different groups attached to it.
Term
Properties of cyclohexane
Definition
Most common cycloalkane, very stable, exists in boat or chair formation. chair is most stable
Term
Aromatic (fragrant) compounds
Definition
Benzene and compounds that resemble benzene in chemical behavior
Term
SH
Definition
thiol
Term
R-O-R
Definition
Ether, IUPAC "oxy"
Term
-CHO
Definition
Aldehydes IUPAC al
Term
C2O3
Definition
anhydrides "oic anhydride"
Term
COOH
Definition
carboxlic acid "oic acid
Term
R-CONR'R"
Definition
amide
Term
CO2
Definition
ester
Term
functional group
Definition
A collection of atoms and/or bonds responsible for the characteristic reactions of a compound
Term
Diene
Definition
Hydrocarbon containing two double bonds
Term
Conjugated
Definition
Double bond alternating with single bond in hydrocarbon chain
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