The crystal structure of C.I. Pigment Yellow 12

Michael J. Barrow, Robert M. Christie, Alan J. Lough, Jean E. Monteith, Paul N. Standring

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


The X-ray crystal structure of C.I. Pigment Yellow 12, 2,2'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo) bis[3-oxo-N-phenylbutanamide], is described. This is the first reported single crystal determination for a disazoacetoacetanilide (Diarylide Yellow) pigment. The molecules exist in the bisketohydrazone form which is structurally analogous to the hydrazone form adopted by the monoazoacetoacetanilide (Hansa Yellow) pigments. Notable features of crystalline C.I. Pigment Yellow 12 are that the molecules are not constrained by crystallographic symmetry and that they are not planar. Some intramolecular hydrogen bonding is observed, but there is no intermolecular hydrogen bonding. © 2000 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)153-160
Number of pages8
JournalDyes and Pigments
Issue number2
Publication statusPublished - May 2000


  • C.I. Pigment Yellow 12
  • Diarylide Yellow
  • Disazo pigment
  • Disazoacetoacetanilide
  • Ketohydrazone
  • X-ray crystallography


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