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Oxidation-Reduction Reactions (Ox-Redox) examples: -rusting -burning wood -digestion -photosynthesis.

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Presentation on theme: "Oxidation-Reduction Reactions (Ox-Redox) examples: -rusting -burning wood -digestion -photosynthesis."— Presentation transcript:

1 Oxidation-Reduction Reactions (Ox-Redox) examples: -rusting -burning wood -digestion -photosynthesis

2 Reactions with a loss and a gain of electrons Coupled reaction- you can’t have one without the other Oxidation-loss of electrons; substance said to be “oxidized” Reduction-gain of electrons; substance said to be “reduced” Biological systems involve the transfer of H atoms (2H+ and 2e-)

3 LEO the lion goes “GER”!

4 Characteristics of Ox-Redox Oxidation: Always involves loss of electrons May involve addition of oxygen May involve loss of H Reduction: Always involves gain of electrons May involve loss of oxygen May involve gain of H

5 Oxidation of Alcohols In organic chemistry, think of Ox-Redox reactions as a loss of H atoms or the addition of oxygen Oxidation includes an increase in the number of C-O bonds (see example p. 396 in Timberlake) Oxidation of a primary alcohol produces an aldehyde Aldehydes, in turn, oxidize into carboxylic acids Secondary alcohols oxidize into ketones Tertiary alcohols do not oxidize (why not?)

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