34305-47-0

Basic information

• Product Name: Tetracyclo[6.1.1.02,7.09,10]deca-2(7),3,5-triene
• Synonyms: 2,3-Dihydro-1,2,3-metheno-1H-indene;Benzobenzvalene;Naphthvalene;Tetracyclo[6.1.1.02,7.09,10]deca-2(7),3,5-triene
• CAS NO: 34305-47-0
• Molecular Formula: C₁₀H₈
• Molecular Weight: 128.1705
• Mol File: 34305-47-0.mol
• Article Data: 4

Chemical Properties

• Boiling Point: 212.5°Cat760mmHg
• Flash Point: 71.3°C
• Appearance: /
• Density: 1.303g/cm³
• Vapor Pressure: 0.251mmHg at 25°C
• Refractive Index: 1.727
• CAS DataBase Reference: Tetracyclo[6.1.1.02,7.09,10]deca-2(7),3,5-triene(CAS DataBase Reference)
• NIST Chemistry Reference: Tetracyclo[6.1.1.02,7.09,10]deca-2(7),3,5-triene(34305-47-0)
• EPA Substance Registry System: Tetracyclo[6.1.1.02,7.09,10]deca-2(7),3,5-triene(34305-47-0)

Safety Data

• Hazardous Substances Data: 34305-47-0(Hazardous Substances Data)

Usage

Purification Methods

Purify it by chromatography on alumina and eluting with pentane, also by reverse phase (ODS) HPLC using MeCN as solvent. It is stable at room temperature [Kjell et al. J Am Chem Soc 108 4111 1986, Abelt et al. J Am Chem Soc 107 4148 1985]. The 1H NMR in CCl4 has 3.18 (4H), 6.17 (t J 1.5Hz, 2H), 7.60 (t J 1.5Hz 2H).

InChI:InChI=1/C10H8/c1-2-4-6-5(3-1)7-9-8(6)10(7)9/h1-4,7-10H

Upstream product

• 122608-26-8 2a,2b,6b,6c-Tetrahydro-1-oxa-2-thiabenzocyclopropapentalene 2-Oxide 
• 122608-25-7 1,1a,6,6a-Tetrahydro-1,6-epithiocyclopropindene 7,7-Dioxide 
• 102505-34-0 diazabenzosemifullvalene 
• 275-51-4 azulene 

Downstream Products

• 91-20-3 naphthalene 
• 2471-84-3 1-methylene-1H-indene 
• 188971-44-0 naphthoylnaphthvalene 
• 22187-13-9 1,4-dihydro-1,4-epoxyanthracene 

Relevant articles and documents

Thermal isomerization of azulene. Single-pulse shock tube investigation

The thermal isomerization of azulene was studied behind reflected shocks in a pressurized driver single-pulse shock tube. The temperature range covered was 1050-1400 K at overall densities of ～2.5 × 10-5 mol/cm3. The main reaction of azulene under these conditions is a unimolecular isomerization to naphthalene, but it also isomerizes, although at a much lower rate, to another isomer. The suggested tetracyclic triene intermediate structure for the uzulene-naphthalene isomerization can lead also to transition states that can describe isomerizations to 1-methylene-1H-indene and 1,2,3-metheno-1H-indene,2,3-dihydro. Small quantities of C2H2, C4H2, C6H6, and C6H5-C≡CH were also found in the post-shock samples, particularly at high temperatures. The Arrhenius parameters of the two high pressure limit rate constants for the isomerization processes are: azulene ??? naphthalene, k1 = 1012.93 exp(-62.8 × 103/RT) s-1 azulene → second isomer, k2 = 1012.42 exp(-69.5 × 103/RT) s-1 A discussion of the mechanism for these isomerization processes is presented. * Author to whom correspondence should be addressed.

155. The Photoreversible Addition of Sulfur Dioxide to Benzobenzvalene: A New Approach to the Benzoprefulvene Biradical

Benzobenzvalene (naphthvalene; 1) is shown to add SO2 to a lateral bicyclobutane bond with formation of a sulfone 2 and a 'γ-sultine' 3.The structure of the latter is unambiguously established by X-ray diffraction.Both adducts extrude SO2 upon direct photolysis at 254 nm and regenerate 1 accompanied by naphthalene in a 1:3 ratio.This result is interpreted in terms of a reversible homolytic cleavage leading, for both, 2 and 3, to the same sulfinyloxy biradical 5, which by loss of SO2 gives the benzoprefulvene biradical 6.The latter in its singlet state undergoes ring closure to 1, or it opens to give naphthalene.