Crystal structures of salen-type ligands 2-[(1<i>E</i>)-({1-(3-chlorophenyl)-2-[(<i>E</i>)-(2-hydroxybenzylidene)amino]propyl}imino)methyl]phenol and 2-[(1<i>E</i>)-({1-(4-chlorophenyl)-2-[(<i>E</i>)-(2-hydroxybenzylidene)amino]propyl}imino)methyl]phenol
Acta crystallographica. Section E, Crystallographic communications