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C99205

Sigma-Aldrich

Cycloheptatriene

95%

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Synonym(s):
Tropiliden, Tropilidene
Empirical Formula (Hill Notation):
C7H8
CAS Number:
Molecular Weight:
92.14
Beilstein/REAXYS Number:
506066
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

assay

95%

form

liquid

refractive index

n20/D 1.519 (lit.)

bp

116-117 °C (lit.)

density

0.888 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

C1C=CC=CC=C1

InChI

1S/C7H8/c1-2-4-6-7-5-3-1/h1-6H,7H2

InChI key

CHVJITGCYZJHLR-UHFFFAOYSA-N

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This Item
157996
Cycloheptatriene 95%

C99205

Cycloheptatriene

1,3-Cycloheptadiene 95%

157996

1,3-Cycloheptadiene

storage temp.

2-8°C

storage temp.

2-8°C

refractive index

n20/D 1.519 (lit.)

refractive index

n20/D 1.498 (lit.)

form

liquid

form

-

density

0.888 g/mL at 25 °C (lit.)

density

0.868 g/mL at 25 °C (lit.)

bp

116-117 °C (lit.)

bp

120-121 °C (lit.)

General description

Contains 0.02%-0.15% BHT

Application

Cycloheptatriene can be used as a reactant to synthesize:      
  • 2-Hydroxyazulene via [2+2] cycloaddition reaction with dichloroketene, and subsequent ring expansion reaction with diazomethane.      
  • 7-Alkyl-bicyclo[4.2.1]nona-2,4,7-trienes by cobalt catalyzed [6+2] cycloaddition with terminal alkynes.     
  • (3,5-Cycloheptadienyl)diphenylphosphine ligand by reacting with diphenylphosphine.

pictograms

FlameSkull and crossbones

signalword

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 3 Oral - Aquatic Chronic 3 - Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

3 - Flammable liquids

wgk_germany

WGK 1

flash_point_f

41.0 °F

flash_point_c

5 °C

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter


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[2+ 2] Cycloaddition reaction of cycloheptatriene with dichloroketene. A novel and efficient synthetic strategy for the synthesis of 2-hydroxyazulene
Yokoyama R, et al.
Journal of the Chemical Society. Perkin Transactions 1, (18), 2257-2261 (2001)
Mathieu Achard et al.
Organic letters, 7(12), 2353-2356 (2005-06-04)
[reaction: see text] The CoI2(dppe)/Zn/ZnI2 system effectively catalyzes the [6 + 2] cycloaddition of cycloheptatriene with terminal alkynes to afford 7-alkyl-bicyclo[4.2.1]nona-2,4,7-trienes in fair to excellent yields. The catalyst proved to be tolerant toward functional groups such as ketone, sulfone, ester
(Cycloheptadienyl) diphenylphosphine: A Versatile Hybrid Ligand
Massard A, et al.
Organometallics, 31(3), 947-958 (2012)
Michael H Palmer et al.
The Journal of chemical physics, 153(5), 054301-054301 (2020-08-11)
The vacuum ultraviolet (VUV) spectrum for cyclohepta-1,3,5-triene up to 10.8 eV shows several broad bands, which are compared with electron impact spectra. Local curve fitting exposed groups of sharp vibrational peaks, which are assigned to Rydberg states. The vertical excitation
Katharina Thum et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 27(7), 2513-2522 (2020-11-17)
The first intermolecular early main group metal-alkene complexes were isolated. This was enabled by using highly Lewis acidic Mg centers in the Lewis base-free cations (Me BDI)Mg+ and (tBu BDI)Mg+ with B(C6 F5 )4 - counterions (Me BDI=CH[C(CH3 )N(DIPP)]2

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