Structure of 2,4,6-trimethoxy-1,3,5-triazine

Abstract

=0"71069A, /z=0.11mm -1, F(000)=360. The structure was solved by direct methods and refined to R = 0"050 for 577 unique X-ray diffractometer data. Delocalization of the s-triazine zr electrons ranges over adjacent O atoms resulting in the formation of a planar 2,4,6-trimethoxy-l,3,5-triazine system with stacking of triazine rings lying in the mirror planes at and 3b levels.

1-(4,6-Dimethoxy-1,3,5-triazin-2-yloxy)-1H-pyridino[2,3-d]triazole

“…1). All bond lengths and angles in both molecules are normal (Table 1) and comparable to those in published structures (Hoffmann et al, 1999;Głó wka & Iwanicka, 1989). The dihedral angles between the planes of the pyridino[2,3-d]triazole and 1,3,5-triazine ring systems in the two independent molecules are 75.2 (6) and 82.3 (6) .…”

Practical One-Pot Synthesis of 4,6-Bis(hetero)aryl- and 4-(Hetero) aryl-6-methyl-substituted 1,3,5-Triazin-2-amines

“…The analysis of C-N bond lengths and the endocyclic angles corroborates the earlier observations that the s-triazine system forms an irregular hexagon structure. 21 The C-N bond lengths range from 1.333 to 1.349 Å and the average angles at the N and C atoms are 114.8° and 125.1°, respectively. The conjugation of the lone-pair electrons at the NH 2 group with the ring -electrons makes the C-NH 2 bond length (1.337 Å) to be comparable to those C(sp 2 )-N(sp 2 ) of the triazine ring.…”

Imbalance of the Kekul� Structures in 2,4,6-Trimethoxy-S-Triazine

“…As we shall show, this typical structural feature of aromatic character is broken in the 2,4,6,-trimethoxy derivative, as shown by the x-ray structure 4 and in particular by low-temperature (100 K) x-ray measurements. This effect is also observed in 1,3,5-trimethoxybenzene.…”