Oxidation with chromium(VI) complexes
Oxidation with chromium(VI) complexes involves the conversion of alcohols to carbonyl compounds or more highly oxidized products through the action of molecular chromium(VI) oxides and salts. The principal reagents are Collins reagent, PDC, and PCC. These reagents represent improvements over inorganic chromium(VI) reagents such as Jones reagent.
Source: Wikipedia — Oxidation with chromium(VI) complexes (CC BY-SA 4.0)