Pentaphs

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Structural formula
Structural formula of pentaphs
General
Surname Pentaphs
other names
  • 2,3: 6,7-dibenzophenanthrene
  • Dibenzo [ b, h ] phenanthrene
Molecular formula C 22 H 14
Brief description

greenish-yellow solid (crystallized in platelets) 

External identifiers / databases
CAS number 222-93-5
EC number 205-927-6
ECHA InfoCard 100.005.389
PubChem 519935
Wikidata Q2069346
properties
Molar mass 278.35 g mol −1
Physical state

firmly

Melting point

257 ° C 

boiling point

265 ° C at 0.05  torr

solubility
safety instructions
GHS hazard labeling
no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Pentaphene (C 22 H 14 ) is a polycyclic aromatic hydrocarbon with five fused benzene rings . The greenish-yellow compound does not dissolve in water or ethanol , but does dissolve well in non-polar organic solvents such as xylene and diethyl ether . Under UV light , penthaphene shows intense blue fluorescence .

The polycycle can be prepared in a six-step synthesis from o -benzoic acid.

Individual evidence

  1. ↑ a b c d e f David R. Lide: CRC Handbook of Chemistry and Physics . 87th edition, 2006, CRC Press, ISBN 978-0-8493-0487-3 , chap. 3, p. 454
  2. ↑ Entry on pentaphene in the ChemIDplus database of the United States National Library of Medicine (NLM), accessed on November 28, 2018.
  3. ↑ a b J. IG Codagan, John Buckingham, F. Macdonald: Dictionary of organic compounds: Volume 5 Mes - Phi. 6th edition, CRC Press, 1996, ISBN 0-412-54090-8 , p. 5125.
  4. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  5. ^ Heinz-Gerhard Franck, Maximilian Zander: A new synthesis of the pentaphene. Chemical Reports , 99 (1965), pp. 396-398. doi : 10.1002 / cber.19660990205 .