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Cl H H C Electrophiles and Nucleophiles
An electrophile is a molecule that is attracted to electrons in another molecule and will accept electron pairs A nucleophile is a molecule donates an electron pair to an electrophile, forming a chemical bond Cl H electrophile C H nucleophile
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Alkanes can also undergo halogenation reactions
Reactions of alkanes One of the most common reactions of alkanes is combustion CH3CH2CH3 + 5 O2 → 4 CO2 + 6 H2O If the reaction takes place in an environment with insufficient oxygen, CO will be made as well CH3CH2CH3 + 4 O2 → CO2 + 2CO + 4 H2O Alkanes can also undergo halogenation reactions + HCl 43% + Cl2 57% + HCl
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Other hydrocarbons can give even more different products
27% 14% + HCl + HCl + Cl2 36% 23% + HCl + HCl
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Aromatic compounds can undergo electrophilic substitution as well
Reactions of alkenes Alkenes commonly undergo electrophilic addition reactions electrophile - Cl Cl H H H3C CH3 + H3C C C CH3 C C H3C H H3C H nucleophile The electrophile adds across the double bond Aromatic compounds can undergo electrophilic substitution as well
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HNO3 H2SO4 heat Toluene 2-Nitrotoluene H2SO4 HNO3 Heat! HNO3 H2SO4 HEAT!! 2,4,6-Trinitrotoluene 2,4-Dinitrotoluene
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We can add organic groups to the aromatic ring by Friedel Crafts alkylation
+ + HBr Adding different organic groups to the ring of different aromatic molecules can lead to a series of multifunctional compounds
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H H3C CH2 O O CH2 H CH3 Reactions of alcohols
Alcohols can undergo condensation reactions to form ethers H+ + heat + H H H3C CH2 O O CH2 H CH3
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Alcohols can be oxidized to carboxylic acids
H2CrO4 + H2O Acetaldehyde Ethanol H2CrO4 Acetic acid The process can be stopped at the aldehyde and the acetaldehyde can be isolated
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+ Reactions of carboxylic acids
Carboxylic acids can condense with alcohols to form esters + Acetic acid Ethanol + H2O Ethyl acetate
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+ + Synthesis of acetylsalicylic acid Acetic Anhydride Salicylic Acid
Acetic Acid Acetylsalicylic Acid
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