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Pentamethylcyclopentadiene

Chemical compound / From Wikipedia, the free encyclopedia

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1,2,3,4,5-Pentamethylcyclopentadiene is a cyclic diene with the formula C5Me5H (Me = CH3).[1] 1,2,3,4,5-Pentamethylcyclopentadiene is the precursor to the ligand 1,2,3,4,5-pentamethylcyclopentadienyl, which is often denoted Cp* (C5Me5) and read as "C P star", the "star" signifying the five methyl groups radiating from the core of the ligand. In contrast to less-substituted cyclopentadiene derivatives, Cp*H is not prone to dimerization.

Quick facts: Names, Identifiers, Properties, Hazards...
Pentamethylcyclopentadiene
Names
Preferred IUPAC name
1,2,3,4,5-Pentamethylcyclopenta-1,3-diene
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.021.586
UNII
  • InChI=1S/C10H16/c1-6-7(2)9(4)10(5)8(6)3/h6H,1-5H3 N
    Key: WQIQNKQYEUMPBM-UHFFFAOYSA-N N
  • InChI=1/C10H16/c1-6-7(2)9(4)10(5)8(6)3/h6H,1-5H3
    Key: WQIQNKQYEUMPBM-UHFFFAOYAI
  • CC1=C(C)C(C)C(C)=C1C
Properties
C10H16
Molar mass 136.24 g/mol
Boiling point 55 to 60 °C (131 to 140 °F; 328 to 333 K) at 13 mmHg (1.7 kPa)
Sparingly soluble
Hazards
Flash point 114 °C (237 °F; 387 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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