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214027

Sigma-Aldrich

1,2,3,4,5-Pentamethylcyclopentadiene

95%

Synonym(s):

1,2,3,4,5-Pentamethyl-1,3-cyclopentadiene

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About This Item

Empirical Formula (Hill Notation):
C10H16
CAS Number:
4045-44-7
Molecular Weight:
136.23
Beilstein:
1849832
EC Number:
223-743-4
MDL number:
MFCD00001354
UNSPSC Code:
12352100
PubChem Substance ID:
24852821
NACRES:
NA.22

Quality Level

200

Assay

95%

refractive index

n20/D 1.474 (lit.)

bp

58 °C/13 mmHg (lit.)

density

0.87 g/mL at 25 °C (lit.)

SMILES string

CC1C(C)=C(C)C(C)=C1C

InChI

1S/C10H16/c1-6-7(2)9(4)10(5)8(6)3/h6H,1-5H3

InChI key

WQIQNKQYEUMPBM-UHFFFAOYSA-N

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General description

Mechanism of the Diels-Alder reaction of paramagneticendohedral metallofullerene and 1,2,3,4,5-pentamethylcyclopentadiene has been studied. Three-step large-scale preparation of 1,2,3,4,5-pentamethylcyclopentadiene has been reported. Reaction of 1,2,3,4,5-pentamethylcyclopentadiene (HCp*) with actinide ions in gas phase has been investigated by laser ablation mass spectrometry. It undergoes radical cation catalyzed cycloaddition with electron rich allenes to form Diels-Alder product.

Application

1,2,3,4,5-pentamethylcyclopentadiene was used as:
  • Growth modifier chemical, during metal organic chemical vapour deposition of iron from iron pentacarbonyl.
  • Ligand in "one-pot" iridium-catalyzed transformation of alcohols to amides via the intermediacy of oximes.
  • Raw material for the synthesis of [Cp*Rh(bpy)H2O]2+ (Cp* = pentamethylcyclopentadienyl, bpy = 2,2′-bipyridyl), an electron mediator in the regeneration process of NADH.

Pictograms

Flame
GHS02

Signal Word

Warning

Hazard Statements

H226

Hazard Classifications

Flam. Liq. 3

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

111.2 °F - closed cup

Flash Point(C)

44 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Bio-inspired NADH regeneration by carbon nitride photocatalysis using diatom templates.
Liu J and Antonietti M.
Energy & Environmental Science, 6(5), 1486-1493 (2013)
The use of 1, 2, 3, 4, 5 pentamethylcyclopentadiene as an in situ growth modifier chemical for the chemical vapour deposition of iron from iron pentacarbonyl.
Lane PA and Wright PJ.
Journal of Crystal Growth, 204(3), 298-301 (1999)
An improved synthesis of 1,2,3,4,5-pentamethylcyclopentadiene.
Kohl FX and Jutzi P.
Journal of Organometallic Chemistry, 243(1), 119-121 (1983)
Reactions of actinide ions with pentamethylcyclopentadiene: atypical hydrocarbon activation.
Gibson JK.
International Journal of Mass Spectrometry, 202(1), 19-29 (2000)
Satoru Sato et al.
Journal of the American Chemical Society, 135(15), 5582-5587 (2013-03-23)
The reaction mechanism of the Diels-Alder reaction of paramagneticendohedral metallofullerene, La@C82, and 1,2,3,4,5-pentamethylcyclopentadiene was studied theoretically and experimentally. Theoretical calculations revealed that this reaction proceeds via a concerted mechanism that includes formation of a stable intermediate. The activation energy of
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Articles

Diels–Alder Reaction

The Diels–Alder reaction is the reaction between a conjugated diene and an alkene (dienophile) to form unsaturated six-membered rings. It is also referred to as a cycloaddition.

Diels–Alder Reaction

The Diels–Alder reaction is the reaction between a conjugated diene and an alkene (dienophile) to form unsaturated six-membered rings. It is also referred to as a cycloaddition.

Diels–Alder Reaction

The Diels–Alder reaction is the reaction between a conjugated diene and an alkene (dienophile) to form unsaturated six-membered rings. It is also referred to as a cycloaddition.

Diels–Alder Reaction

The Diels–Alder reaction is the reaction between a conjugated diene and an alkene (dienophile) to form unsaturated six-membered rings. It is also referred to as a cycloaddition.

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