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| CAS No.: | 1271-24-5 |
|---|---|
| Name: | Chromocene |
| Article Data: | 12 |
| Molecular Structure: | |
|
|
|
| Formula: | C10H10 Cr |
| Molecular Weight: | 182.185 |
| Synonyms: | Chromium,di-p-cyclopentadienyl- (8CI);Chromium, dicyclopentadienyl- (6CI,7CI); Bis(cyclopentadiene)chromium;Bis(cyclopentadiene)chromium(II); Bis(cyclopentadienyl)chromium;Bis(cyclopentadienyl)chromium(II); Bis(h5-cyclopentadienyl)chromium; Chromium, bis(h5-2,4-cyclopentadien-1-yl)-; Di(h5-cyclopentadienyl)chromium;Dicyclopentadienylchromium |
| EINECS: | 215-036-4 |
| Density: | g/cm3 |
| Melting Point: | 172°C to 173°C |
| Boiling Point: | 41.5 °C at 760 mmHg |
| Flash Point: | °C |
| Solubility: | insoluble in water |
| Appearance: | bordeaux crystalline powder |
| Hazard Symbols: |
|
| Risk Codes: | R36/37/38 |
| Safety: | 26-37/39 |
| Transport Information: | UN# 2846 |
| PSA: | 0.00000 |
| LogP: | 2.04300 |
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Chemistry
Molecular Structure of Chromocene (CAS NO.1271-24-5):
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IUPAC Name: Chromium(2+); cyclopenta-1,3-diene
Molecular Formula: C10H10Cr
Molecular Weight: 182.18
EINECS: 215-036-4
Density: 1.43 g/cm3, solid
Melting point: 168-170 °C
Melting Point: 168-170 °C(lit.)
Enthalpy of Vaporization: 27.4 kJ/mol
Boiling Point: 41.5 °C at 760 mmHg
Vapour Pressure: 418 mmHg at 25 °C
Sensitive: Air & Moisture Sensitive
Classification Code: Mutation data
Product Categories: Organometallics
Solubility in water: decomposes in water
Appearance: Red needles or reddish-purple solid.
Canonical SMILES: [CH-]1C=CC=C1.[CH-]1C=CC=C1.[Cr+2]
InChI: InChI=1S/2C5H5.Cr/c2*1-2-4-5-3-1;/h2*1-5H;/q2*-1;+2
InChIKey: TYYBBNOTQFVVKN-UHFFFAOYSA-N
Production
Chromocene (CAS NO.1271-24-5) is prepared by the following route:
CrCl2 + 2 NaC5H5 → Cr(C5H5)2 + 2 NaCl
Safety Profile
Safety Information of Chromocene (CAS NO.1271-24-5):
Hazard Codes:
Xn,
Xi
Risk Statements: 20/21/22-36/37/38
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-37/39
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S37/39:Wear suitable gloves and eye/face protection.
RIDADR: 1325
WGK Germany: 3
RTECS: GB7600000
HazardClass: 4.2
PackingGroup: I
Specification
Chromocene (CAS NO.1271-24-5), its Synonyms are Bis(cyclopentadiene)chromium ; Bis(cyclopentadiene)chromium(II) ; Bis(cyclopentadienyl)chromium ; Bis(cyclopentadienyl)chromium(II) ; CCRIS 5974 ; Chromium, dicyclopentadienyl- ; Di((eta-5)-cyclopentadienyl)chromium ; Dicyclopentadienylchromium ; Bis(eta5-cyclopenta-2,4-dien-1-yl)chromium . It is very sensitive to exposure to air and moisture (decomposition is not vigorous).
Chromocene reacts with water and alcohols. . It's reaction with alcohols produces pyrophoric metal alkoxides (dialkoxychromium and cyclopentadiene).It is often abbreviated Cp2Cr. This sandwich compound is structurally similar to ferrocene but does not follow the 18-electron rule because it only has 16 electrons and therefore it also paramagnetic and far more reactive.