[Inhoudsopgave]: 1,2,3 TRIAZINES (H. Neunhoeffer). Introduction. Uncondensed Aromatic Systems. Uncondensed Reduced Systems. 1,2,3 Triazine Rings Condensed with Carbocycles. 1,2,3 Triazine Rings Condensed with Heterocycles through Carbon Atoms. 1,2,3 Triazine Rings Condensed with Heterocycles through a Carbon Atom and a Nitrogen Atom. 1,2,3 Triazine Rings Condensed with Two Heterocycles. 1,2,3 Triazine Rings Condensed with Heterocycles through Two Nitrogen Atoms. Uses and Biochemical Aspects of 1,2,3 Triazine Derivatives. 1,2,4 TRIAZINES (H. Neunhoeffer). Introduction. Uncondensed Aromatic Systems. Uncondensed Reduced 1,2,4 Triazines. Condensed 1,2,4 Triazine Systems. 1,2,4 Triazine Rings Condensed with Heterocycles through Carbon Atoms. 1,2,4 Triazine Rings Condensed with Heterocycles through a Carbon and a Nitrogen Atom. 1,2,4 Triazine Rings Condensed with Heterocycles through Two Nitrogen Atoms. 1,2,4 Triazine Rings Condensed with Two Heterocycles. 1,2,4 Triazine Rings as Part of a Bicyclic System. Uses and Biochemical Aspects of 1,2,4 Triazines. Polymers Containing the 1,2,4 Triazine Nucleus. References. 1,2,4,5 TETRAZINES (P. F. Wiley). Introduction. Uncondensed Aromatic Systems. Uncondensed Reduced Systems. Verdazyls. Condensed Systems. Polymers. Uses. References. OTHER SIX MEMBERED NITROGEN HETEROCYCLES. (P. F. Wiley). 1,2,3,4 Tetrazines. 1,2,3,5 Tetrazines. Pentazines.