Presentation on theme: "Table of Ka Values Acid-Dissociation Constants of Representative Alcohols Alcohol Structure Ka pKa methanol ethanol 2-chloroethanol 2-2-trichloroethanol."— Presentation transcript:
1 Table of Ka ValuesAcid-Dissociation Constants of Representative AlcoholsAlcoholStructureKapKamethanolethanol2-chloroethanol2-2-trichloroethanolisopropyl alcoholt-butyl alcoholphenolcyelohexanolwateracetic acidhydrocholric acidComparison with other acids
5 Alcohols, carbonyl compounds and carboxylic acids: REDUCTIONReduction: Addition of H2 (or H-), loss of O or O2; loss of X2AldehydeCarboxylic acidPrimary alcoholKetoneSecondary alcoholTeritiary alcoholLithium aluminiumhydrideSodium borohydridemust convert OH toleaving group
6 Comparison of Reducing Agents • LiAlH4 is stronger. • LiAlH4 reduces morestable compoundswhich are resistant toreduction.• LiAlH4 is stronger.reducesesterAcid (anion)aldehydeketoneease of reduction
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