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Oxidation of an Alcohol to an Aldehyde

ORGO2-CVES6T

Which reagent would be best for carrying out this transformation?

A

$1) LiAl{H}_{4},{Et}_{2}O$
$2) {H}_{3}{O}^+,{H}_{2}O$

B

${K}_{2}{Cr}_{2}{O}_{7} (aq), {H}_{2}{SO}_{4}$

C

$PCC, {CH}_2{Cl}_2$

D

$(D) {H}_{3}{O}^{+}, \text{heat}$