Chromocene

Base Information

• Chemical Name: Chromocene
• CAS No.: 1271-24-5
• Molecular Formula: C10H10 Cr
• Molecular Weight: 182.185
• Hs Code.: 29319090
• European Community (EC) Number: 215-036-4
• UN Number: 1325
• UNII: FI251W8B1L
• DSSTox Substance ID: DTXSID7024615
• Wikipedia: Chromocene
• Wikidata: Q418966
• Mol file: 1271-24-5.mol

Synonyms:Chromocene;1271-24-5;Bis(cyclopentadienyl)chromium;Bis(cyclopentadienyl)chromium(II);Bis(cyclopentadiene)chromium(II);Bis(cyclopentadiene)chromium;Dicyclopentadienylchromium;Chromium, dicyclopentadienyl-;CCRIS 5974;FI251W8B1L;DTXSID7024615;EINECS 215-036-4;Di((eta-5)-cyclopentadienyl)chromium;Bis(eta5-cyclopenta-2,4-dien-1-yl)chromium;Chromium, bis(eta(5)-2,4-cyclopentadien-1-yl);UNII-FI251W8B1L;DTXCID904615;Tox21_202889;LS-2097;NCGC00260435-01;CAS-1271-24-5;FT-0693151;Bis(eta(5)-2,4-cyclopentadien-1-yl) chromium;Q418966;J-005465

Chemical Property of Chromocene

Chemical Property:

• Appearance/Colour: bordeaux crystalline powder
• Vapor Pressure: 418mmHg at 25°C
• Melting Point: 172°C to 173°C
• Boiling Point: 41.5 °C at 760 mmHg
• Flash Point: °C
• PSA: 0.00000
• Density: g/cm³
• LogP: 2.04300
• Storage Temp.: Store below +30°C.
• Sensitive.: Air & Moisture Sensitive
• Water Solubility.: Insoluble in water.
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 2
• Rotatable Bond Count: 0
• Exact Mass: 182.018755
• Heavy Atom Count: 11
• Complexity: 11.6
• Transport DOT Label: Flammable Solid

Purity/Quality:

98% ^*data from raw suppliers

Bis(cyclopentadienyl)chromium, min. 95%, sublimed (Chromocene) ^*data from reagent suppliers

Safty Information:

• Hazard Codes: Xn,Xi
• Statements: 20/21/22-36/37/38
• Safety Statements: 26-37/39

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Canonical SMILES: [CH-]1C=CC=C1.[CH-]1C=CC=C1.[Cr+2]
• Uses: Provides catalyst for ethylene polymerization. A precursor to other chromium(II) compounds.

Technology Process of Chromocene

There total 10 articles about Chromocene which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 92.0%

[Cr(NCC6H5)4(FBF3)2] (206429-86-9) + sodium cyclopentadienide → bis(cyclopentadienyl)chromium (1271-24-5)

Guidance literature:

In tetrahydrofuran; (argon); heating the Cr complex in THF to 40°C, addn. of NaC5H5, stirring (room temp., 30 min); solvent removal (vac.), extn. (n-hexane), solvent removal; elem. anal.;

Reference yield: 90.0%

Cp(η3-C3H5)2Cr + cyclopenta-1,3-diene (542-92-7,25568-84-7,7313-32-8) → bis(cyclopentadienyl)chromium (1271-24-5)

Guidance literature:

DOI:10.1016/S0277-5387(00)80116-3

Reference yield: 70.0%

chromium(III) chloride (10025-73-7,16284-59-6) + cyclopentadienylmagnesium bromide (17306-10-4) → bis(cyclopentadienyl)chromium (1271-24-5)

Guidance literature:

In not given;

upstream raw materials:

chromium(III) chloride

cyclopentadienylmagnesium bromide

[Cr(NCC₆H₅)4(FBF₃)2]

cyclopenta-1,3-diene

Downstream raw materials:

chromium⁽⁰⁾ hexacarbonyl

ferrocene

cadmium

chromium(II) acetate

Refernces

• 1、 Angermund, K.,Betz, P.,Doehring, A.,Jolly, P. W.,Krueger, C.,Schoenfelder, K. U.. "". . p. 2663 - 2670. Retrieved 1993.
• 2、 Girolami, Gregory S.,Wilkinson, Geoffrey,Thornton-Pett, Mark,Hursthouse, Michael B.. "η5-Cyclopentadienyl and η5-Methylcyclopentadienyl 1,2-Bis(dimethylphosphino)ethane Complexes of Titanium(II). The Crystal Structure of Ti(C5H4Me)2(dmpe)". . p. 2347 - 2350. Retrieved 1984.
• 3、 Spreer, Larry O.,Shah, Ihsanullah. "Evidence for a novel π-bonded aquoorganochromium(III) ion, (η5-C5H5)Cr(OH2) n2+". . p. 4025 - 4027. Retrieved 2008/10/08.