Abstract
The X-ray crystal structures of three tricyclic neuroleptics have been completed and are reported herein. These include amitriptyline hydrochloride (I), chlorprothixene hydrochloride (II), and ethopropazine hydrochloride (III). The structures were compared with the structures of similar molecules with similar pharmacological activity. It was found that there is a great deal of flexibility in the structures of these molecules, which makes it difficult to determine the pharmacologically active conformations. Crystallographic data: (I) C20H24NCI, monoclinic space groupP21/a,a= 13.812(4) Å,b= 9.140(2) Å,c= 14.345(4) Å, β = 96.82(2)°,Z= 4, finalR= 0.059 for 1630 observed (l3σ(l)) reflections. (II) C18H20NSCI2. CHCI3, monoclinic space groupC2/c, a= 29.416(4) Å,b= 6.986(1) Å,c= 23.374(3) Å, β = 109.78(1)°,Z= 8, finalR= 0.046 for 1436 observed reflections. (III) C19H25N2SCI, monoclinic space groupP21/c, a = 8.849(1) Å,b= 14.475(2) Å,c= 14.832(1) Å, β = 98.72(1)°,Z= 4, finalR= 0.039 for 2583 observed reflections.
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