A monoclinic polymorph of the title compound [systematic name: 2‐hydroxy‐2‐(4‐methoxy­phenyl)‐1‐methyl‐N‐(1‐phen­oxy‐2‐propyl)­ethanaminium chloride], C18H24N2O3+·Cl−, has been found in addition to the already known triclinic polymorph. The molecular conformation in both polymorphs is very similar.

The title compound, C14H12O2, is used as an intermediate for the synthesis of various biologically active and pharmaceutical compounds. Bond lengths and angles adopt usual values. The dihedral angles between the two aromatic rings [53.39 (3)°] and between the carboxyl group and adjacent ring [42.37 (10)°] lie in the expected ranges. The crystal structure is characterized by centrosymmetric hydrogen‐bonded dimers.

Key indicatorsSingle-crystal X-ray study T = 173 K Mean '(C±C) = 0.003 A Ê Disorder in solvent or counterion R factor = 0.044 wR factor = 0.131 Data-to-parameter ratio = 14.6For details of how these key indicators were automatically derived from the article, see

The title compound, C14H16N2, adopts a trans‐planar conformation. However, the mol­ecule, which possesses Ci point group symmetry, crystallizes in the non‐centrosymmetric space group P212121. In the crystal structure, the mol­ecular symmetry is only approximately retained. The crystal packing is predominantly stabilized by N—H·N hydrogen bonds. Weak C—H·π inter­actions also contribute to the stability.

The title compound, C22H20ClN3O, (I), is used as an inter­mediate for the synthesis of the antihypertensive drug losartan. Bond lengths and angles are unexceptional. The crystal packing is stabilized by one C—H·O and one C—H·N contact. It is noteworthy that (I) is isomorphous with a closely related compound which differs in having a but‐2‐en­yl chain instead of a but­yl chain on the imidazole ring.