Friday, March 1, 2013

Organic Chemistry

Organic Chemistry: Physical Properties and Chemical Reactivity
Summary of answer Types substitute Addition/Elimination Oxidation/ simplification Hydrolysis/ concretion Hydrocarbons alkanes/cycloalkanes alkenes alkynes aromatics Alcohols/Amines Ketones/Aldehydes Carboxylic Acids/Esters and Amides Polymers polyethylenes polyesters polypeptides

Summary of Reaction Types in Organic Chemistry
Substitution in which one functional group is replaced by another
- veritable(prenominal) of alkanes, alkyl halides and benzenes
R-H R-X

+ + +

X2 OH-

R-X R-OH

+ +
R

HX X

R-X

AlX3

Addition/Elimination in which a minor(ip) molecule (typically X2, HX or H-OH) is added/eliminated
- alkenes undergo Addition - some alkyl halides and alcohols undergo Elimination
H X

+
H X

HX

strong base

+

HX

Oxidation/ decrement in which the number of bonds between carbon and oxygen is increase/ fall. Also, reactions in which the number of bonds between carbon and hydrogen is decreased/increased.

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alcohols, ketones/aldehydes and carboxylic acids can be interchanged by Oxidation/Reduction reactions
-

- alkanes, alkenes and alkynes can be interchanged by Oxidation/Reduction reactions
O R-CH2-OH O [H] R-C-OH [O] R-C-H O [H] R-C-H R-CH2-OH [O] R-C-OH O

H H H H

[O]

H

H

[O]

[H]

H

H

[H]

H H H H

NOTE: [O] = oxidizing agent; [H] = reducing agent

Hydrolysis/ muscle contraction in which the addition of H2O results in the bond partition or in which bond formation results in the elimination of H2O
- typical of ester and amide breakdown/formation
O O O R O

R

+

H2O

R
O

OH

+

R-OH

R

NH-R

+

H2O

R

OH

+

R-NH2

O

O OH

R
O

+

R-OH

R
O

O-R

+

H2O

R

OH

+

R-NH2

R

NH-R

+

H2O

Alkanes and Cycloalkanes
CnH2n+2 CnH2n

chains/rings with tetrahedral (sp3 hybridized) carbons

109.5o

=

free rotation nearly single bonds

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