QUINOLINIUM CHLOROCHROMATE Property

Melting point:

127-130°C

form 

Solid

color 

Orange/Brown Crystalline

Safety

Hazard Codes 

T,N

Risk Statements 

49-43-50/53

Safety Statements 

53-45-60-61

RIDADR 

3087

HazardClass 

5.1

PackingGroup 

III

Hazard and Precautionary Statements (GHS)

QUINOLINIUM CHLOROCHROMATE Chemical Properties,Usage,Production

Chemical Properties

Orange/Brown Crystalline Solid

Uses

Selective oxidation reagent for the oxidation primary alcohols in the presence of secondary alcohols.

Purification Methods

It is a yellow-brown solid which is stable in air for long periods. If it has deteriorated or been kept for too long, it is best to prepare it freshly. Add freshly distilled quinoline (13mL) to a mixture of chromic acid (CrO3) (10g) and ~ 5M HCl (11mL of conc HCl and 10mL of H2O) at 0o. A yellow-brown solid separates, it is filtered off on a sintered glass funnel, dried for 1hour in a vacuum, and can be stored for extended periods without serious loss in activity. It is a good oxidant for primary alcohols in CH2Cl2. [Singh et al. Chem Ind (London) 751 1986, method of Corey & Suggs Tetrahedron Lett 2647 1975, Beilstein 20/7 V 276.]