Left to right: 2-methyl-1,3-cyclopentadiene; 1-methyl-1,3-cyclopentadiene; 5-methyl-1,3-cyclopentadiene
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Names | |
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Other names
Cp′; MeCp
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Identifiers | |
CAS Number
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3D model (JSmol)
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ChemSpider |
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ECHA InfoCard | 100.043.400 |
EC Number |
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PubChem CID
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UNII |
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UN number | 1993 |
CompTox Dashboard (EPA)
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InChI
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SMILES
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Properties | |
Chemical formula
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C6H8 |
Molar mass | 80.130 g·mol−1 |
Hazards | |
GHS labelling: | |
Pictograms
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Signal word
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Danger |
Hazard statements
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H226, H350, H410 |
Precautionary statements
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P201, P202, P210, P233, P240, P241, P242, P243, P273, P280, P281, P303+P361+P353, P308+P313, P370+P378, P391, P403+P235, P405, P501 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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Methylcyclopentadiene is any of three isomeric cyclic dialkenes with the formula C5MeH5 (Me = CH3). These isomers are the organic precursor to the methylcyclopentadienyl ligand (C5H4Me, often denoted as Cp′), commonly found in organometallic chemistry.
As with cyclopentadiene, methylcyclopentadiene is prepared by thermal cracking of its Diels–Alder dimer, followed by distillation for removal of cyclopentadiene, a common impurity.[1]