Cl Intermolecular Interactions Research Articles

1-Phenethylguanidinium Chloride

The asymmetric unit of the title compound, C10H16N5+.Cl−, contains two molecules with quite different conformations of the biguanide moiety. The crystal structure determined by Herrnstadt et al. [J. Chem. Soc. Perkin Trans. 2 (1979), pp. 735–740] is properly refined, the H-atom positions on the biguanide moiety are evident and the hydrogen-bonding scheme is clarified. Protonation of the biguanide moiety produces a rearrangement of protons in this part of the molecule. The two independent protonated molecules in the crystal form a hydrogen-bonded dimer through two intermolecular N—H⋯N hydrogen bonds. In addition, the molecules are held together by van der Waals forces and several N—H⋯Cl intermolecular interactions.

2-Chloro-4-methoxy-6-methyl-1,3,5-triazine

Molecules of the title compound, C 5 H 6 ClN 3 O, lie on crystallographic mirror planes. Within these planes molecules are linked into zigzag chains by N...Cl intermolecular interactions of 3.139 (3) A. Molecules in adjacent planes are rotated by 180 o but lie almost directly above one another; the interplanar spacing is 3.283 (2) A. Ring angles at the N atoms are substantially more acute than those at the C atoms