Addukte Aromat/Chlorwasserstoff bei tiefen Temperaturen : Beiträge zu Bildung und Kristallstruktur

The melting diagrams of the systems benzene-HCl, toluene-HCl and mesitylene-HCl have been established and the crystal structures of two adducts determined. The adduct toluene.2HCl, melting incongruently at -115 o C, is monoclinic with space group C2/c and Z=4 formula units per unit cell; the adduct mesitylene.HCl, m.p. -64 o C, is orthorhombic with space group P bca and Z=8. The HCl molecules are situated on both sides and one side, respectively, of the plane of the aromatic system and are linked to it by weak hydrogen bonds of the type Cl-H...π.