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HomeProduct name listChromocene

Chromocene

Synonym(s):Chromocene;Di(cyclopentadienyl)chromium(II)

  • CAS NO.:1271-24-5
  • Empirical Formula: C10H10Cr10*
  • Molecular Weight: 182.18
  • MDL number: MFCD00013750
  • EINECS: 215-036-4
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-08-11 15:28:25
Chromocene Structural

What is Chromocene?

Chemical properties

bordeaux crystalline powder

The Uses of Chromocene

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

What are the applications of Application

Bis(cyclopentadienyl)chromium(II) is a catalyst for stereoselective pinacol-type cross-coupling reactions

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.]

Properties of Chromocene

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)

Safety information for Chromocene

Signal word Danger
Pictogram(s)
ghs
Corrosion
Corrosives
GHS05
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H314:Skin corrosion/irritation
H317:Sensitisation, Skin
Precautionary Statement Codes P260:Do not breathe dust/fume/gas/mist/vapours/spray.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for Chromocene

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