Question

what are Collins reagent?

Answer 1

Collins reagent is the complex of chromium(VI) oxide with pyridine in dichloromethane. It is used to selectively oxidize primary alcohols to the aldehyde, and will tolerate many other functional groups within the molecule.

C10H10CrN2O3

A solution of CrO3 • 2 Py (Sarett Reagent) in methylene chloride is called the "Collins Reagent".

Answer 2

Answer:

Collins reagent is the complex of chromium(VI) oxide with pyridine in dichloromethane. This metal-pyridine complex, a red solid, is used to oxidize primary alcohols to the aldehyde. This complex is a hygroscopic orange solid.