Sentence Examples


  • PYRIMIDINES, METADIAZINES or Miazines, in organic chemistry, a series of heterocyclic compounds containing a ring complex, composed of four carbon atoms and two nitrogen atoms, the nitrogen atoms being in the meta-position.
  • XANTHONE (dibenzo-y-pyrone, or diphenylene ketone oxide), C H 0 in organic chemistry, a heterocyclic compound containing the ring system shown below.
  • There also exists an extensive class of compounds termed the " heterocyclic series " - these compounds are derived from ring systems containing atoms other than carbon; this class is more generally allied to the aromatic series than to the aliphatic.
  • Carbocyclic rings will next be treated, benzene and its allies in some detail; and finally the heterocyclic nuclei.
  • And >- CH, the first characterizing the polymethylene and reduced heterocyclic compounds, the second true aromatic compounds.

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