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Chromocene

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Chromocene Basic information

Product Name:
Chromocene
Synonyms:
  • BIS(CYCLOPENTADIENYL)CHROMIUM
  • BIS(CYCLOPENTADIENYL)CHROMIUM(II)
  • CHROMOCENE
  • Bis(cyclopentadienyl)chromium 5% In Toluene
  • Bis(cyclopentadienyl)chrom
  • BIS-(CYCLOPENTADIENYL)CHROMIUM(II) (CHROMOCENE)
  • bis(cyclopentadiene)chromium
  • bis(cyclopentadiene)chromium(ii)
CAS:
1271-24-5
MF:
C10H10Cr10*
MW:
182.18
EINECS:
215-036-4
Product Categories:
  • Organometallics
  • metallocene
  • metallo-organic compound
Mol File:
1271-24-5.mol
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Chromocene Chemical Properties

Melting point:
168-170 °C(lit.)
storage temp. 
Store below +30°C.
form 
crystal
color 
scarlet
Water Solubility 
Insoluble in water.
Sensitive 
Air & Moisture Sensitive
NIST Chemistry Reference
Bis(«eta»5-cyclopentadienyl) chromium(1271-24-5)
EPA Substance Registry System
Chromocene (1271-24-5)
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Safety Information

Hazard Codes 
Xn,Xi
Risk Statements 
20/21/22-36/37/38
Safety Statements 
26-37/39
RIDADR 
1325
WGK Germany 
3
RTECS 
GB7600000
TSCA 
Yes
HazardClass 
4.2
PackingGroup 
I
HS Code 
29319090

MSDS

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Chromocene Usage And Synthesis

Chemical Properties

bordeaux crystalline powder

Uses

Provides catalyst for ethylene polymerization. A precursor to other chromium(II) compounds.

General Description

Red needles or reddish-purple solid.

Air & Water Reactions

Chromocene is very sensitive to exposure to air and moisture (decomposition is not vigorous). Decomposes in water .

Reactivity Profile

Chromocene reacts with water and alcohols. . It's reaction with alcohols produces pyrophoric metal alkoxides (dialkoxychromium and cyclopentadiene).

Fire Hazard

Literature sources indicate that Chromocene is flammable.

Purification Methods

Chromocene forms pyrophoric red crystals on sublimation at 50o/0.1mm followed by resublimation at 75-90o/0.1mm. Although it is stable at least to 300o, it is readily oxidised in air, and effervesces slowly in H2O to give cyclopentadiene. All operations should be carried out in a dry box. It decomposes in CCl4 or CS2, and for IR even grinding with nujol, KBr or KI causes some decomposition. [Wilkinson et al. J Inorg Nucl Chem 95 109 1956, Wilkinson J Am Chem Soc 76 209 1954, Beilstein 16 IV 1774.]

Chromocene Preparation Products And Raw materials

Raw materials

ChromoceneSupplier

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