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.

reaction suitability

core: chromium
reagent type: catalyst

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.]