Synthesis of chiral large-ring triangular salen ligands and structural characterization of their complexes

Large chiral triangular macrocycles having three salen ligand sites were obtained by cyclocondensation of trans-1,2-diaminocyclohexane with linearly connected bis-salicylaldehydes. Structures of the ligands and their titanium(IV) or zinc(II) complexes have been characterized by means of spectroscopic (CD) and computational (DFT) methods.