Syntheses, crystal structures and Hirshfeld surface analyses of four mol-ecular salts of amitriptynol.

The syntheses and crystal structures of four salts of amitriptynol (CHNO) with different carb-oxy-lic acids are described. The salts formed directly from solutions of amitriptyline (which first hydrolysed to amitriptynol) and the cor-responding acid in aceto-nitrile to form amitriptynolium [sys-tem-atic name: (3-{2-hy-droxy-tri-cy-clo[9.4.

Syntheses and crystal structures of benzyl '-[()-2-hydroxybenzylidene]hydrazinecarboxylate and benzyl '-[()-5-bromo-2-hydroxybenzylidene]hydrazinecarboxylate.

Benzyl '-[()-2-hydroxybenzylidene]hydrazinecarboxylate, CHNO () and benzyl '-[()-5-bromo-2-hydroxybenzylidene]hydrazinecarboxylate (), CHBrNO, have been synthesized by the reaction of either 2-hy-droxy-benzaldehyde or 5-bromo-2-hy-droxy-benzaldehyde with benzyl carbazate, respectively. Both the compounds crystallize in the monoclinic crystal system with space groups (' = 1, ) and 2/ (' = 2, ). Mol-ecular conformations in each structure are similar, and both structures feature strong intra-molecular O-H⋯N hydrogen bonds, which form (6) ring motifs.