BENZENE CHROMIUM TRICARBONYL Property

Melting point:

163-166 °C (lit.)

form 

crystal

color 

yellow

BRN 

3571699

Safety

Hazard Codes 

Xn

Risk Statements 

20/21/22

Safety Statements 

36/37

RIDADR 

2811

WGK Germany 

3

RTECS 

GB4700000

HS Code 

29310099

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

BENZENE CHROMIUM TRICARBONYL Chemical Properties,Usage,Production

Chemical Properties

yellow crystalline powder

Uses

Catalyst for:

• Oxidation of alkenes
• Hydrogenation of alkynes

Preparation

For cases where large quantities are needed, benzene chromium tricarbonyl is easily prepared from the reaction of benzene with Hexacarbonylchromium.

Solubility in organics

benzene chromium tricarbonyl is soluble in THF, ether, benzene.

Purification Methods

Purify the complex by sublimation in vacuo. A possible impurity is 2-picoline which can be removed by washing with pentane and drying. It is then purified further by sublimation at 80-85o/10-3mm, or by recrystallisation from Et2O to give yellow crystals. 1H NMR in CDCl3 should give a single peak at 4.68. [Rausch J Org Chem 39 1787 1974, Pauson in Houben-Weyl Meth Org Chem V, E 18 Pt I p226 Theme Verlag, Stuttgart 1986, Beilstein 5 IV 625.]