cas 23912-79-0, 5,7,12,14-Pentacenetetrone | Articles data ｜lookchem

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23912-79-0

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Synthesis of 5,7,12,14-tetraarylpentacenes from pentacene-5,7,12,14-tetrone and characterisation of the tetrol intermediates
Pentacene has excellent semi-conducting properties but its practical use in organic thin-film transistors (OTFTs) has some drawbacks caused by its sensitivity to oxygen and low solubility. In order to overcome these problems one can introduce substituents
Vets, Nathalie,Dili?n, Hanne,Toppet, Suzanne,Dehaen, Wim
p. 1359 - 1362
(2006)
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Dimerizations of 2-bromo-3-methyl-1,4-naphthoquinone and 2-methyl-1,4-naphthoquinone in tetra-n-butylammonium bromide
2-Bromo-3-methyl-1,4-naphthoquinone and 2-methyl-1,4-naphthoquinone are highly reactive species known to dimerize in various ways. The product obtained in the dimerization of each compound is primarily dependent upon the solvent used. Ionic liquids represent a new class of solvents having non-molecular (ionic) character. Replacement of a conventional organic solvent with an ionic solvent frequently changes the mechanism of a reaction. In this study, reactions of 2-bromo-3-methyl-1,4-naphthoquinone and 2-methyl-1,4-naphthoquinone in ionic liquids were examined. Dimerization of 2-bromo-3-methyl-1,4-naphthoquinone or 2-methyl-1,4-naphthoquinone with N-methylcyclohexylamine in tetra-n-butylammonium bromide (TBAB), an ionic liquid, under an aerobic atmosphere afforded 5,7,12,14-pentacenetetrone and 1-methylKuQuinone, respectively. The use of TBAB as a solvent improved the yields of the products as compared with previously reported methods. The mechanism of each dimerization was also investigated.
Kamo, Shogo,Kuramochi, Kouji,Onuki, Mai,Ota, Motohiro,Otokozawa, Shoya,Tomoshige, Shusuke,Tsubaki, Kazunori
(2019)
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Baxter et al.
p. 563
(1969)
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Chemical Properties

Melting Point: 400 °C
Boiling Point: 597.4 °C at 760 mmHg
Flash Point:266.3 °C
Density: 1.479g/cm³
Storage Temp.:Sealed in dry,Room Temperature
Vapor Pressure: 3.11E-14mmHg at 25°C
Refractive Index: 1.727
PSA: 68.28000
LogP: 2.61580

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