Which of the following will be oxidized by H I O 4 ? 1 . R - C | | O - C | | O - R 2 . R - C | | O - C H | O H - R 3 . R - C H | O H - C H 2 - C H | O H - R 4 . R - C H | O H - C H | O H - R Select th

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The net result of oxidation is the cleavage of the bond between C's with the attached O's with addition of OH to 'C' of each $C - O$ .

In 1, 2-diols, the net effect is the oxidation is the cleavage ofbond and attachment of an OH to each 'C' atom. The gem-diol so formed loses a molecule of $H_{2} O$ .

$1 .$ $R - \underset{O}{\underset{| |}{C}} - \underset{O}{\underset{| |}{C}} - R \overset{H I O_{4}}{\to} R - \underset{O}{\underset{| |}{C}} - O H + H O - \underset{O}{\underset{| |}{C}} - R$

$2 .$ $R - \underset{O}{\underset{| |}{C}} - \underset{O H}{\underset{|}{C H}} - R \overset{H I O_{4}}{\to} R - \underset{O}{\underset{| |}{C}} - O H + O = C H - R$

$4 .$ $R - \underset{O H}{\underset{|}{C H}} - \underset{O H}{\underset{|}{C H}} - R \overset{H I O_{4}}{\to} R - C H = O + O = H C R$

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