2,4,6-tris(methylthio)-1,3,5-triazine, 3-methyl-4,6-bis(methylthio)-1,3,5-triazine-2(3H)-thione, 1,3-dimethyl-4-methylthio-1,3,5-triazine-2,6(1H,3H)-dithione and 1,3,5-trimethyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trithione

The crystal structures of four isomers of C6H9N3S3 were determined. Their molecules tend to be planar, but the tendency is weakened when the number of formal N=C double bonds in the ring decreases. The structures of the triazine rings in the four compounds were found to be similar to their oxy analogues. All of the compounds form planar layer structures with similar interlayer spacing ranging from 3.41 to 3.60 Angstrom. The molecular packing of each isomer is controlled by weak van der Waals interactions.