Acta Cryst. (2010). E66, o2481 [ doi:10.1107/S1600536810033775 ]
Abstract: In the title molecular salt, C7H14N5O+·Cl- (the HCl salt of the oxo derivative of the triazine herbicide simazine), the cation and anion are linked by N-HCl hydrogen bonds. The chloride ion is also involved in a close electrostatic interaction with an inversion-related triazine ring [Clcentroid distance = 3.201 (1) Å]. A - interaction having a centroidcentroid distance of 3.456 (2) Å exists between pairs of rings via another inversion relation. The triazine ring and adjacent non-H atoms are essentially planar (r.m.s. deviation = 0.042 Å), while both methyl groups are approximately perpendicular and on the same side of the plane [torsion angles = 79.3 (3) and -84.6 (3)°]. Upon exposure to X-rays for about two days, the color of the title compound changed from colorless to a pale yellow-orange with no apparent affect on the structure as evidenced by no significant change in the intensities of the standard reflections.
Online 4 September 2010
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