Neue dreizähnige Liganden vom Typ N-AlkyI-N,N-bis(2-pyridylmethyl)amin/ New Tridentate Ligands of the Type N-Alkyl-N,N-bis(2-pyridylmethyl)amine

New tridentate ligands of the type N-alkyl-N,N-bis(2-pyridylmethyl)amine (alkyl = me­ thyl, benzyl, adamantyl) have been synthesized by reaction of alkylamines with 2 -(chlor-methyl)pyridine in alkaline solution. These amines are preferably isolated and stored as per­ chlorates. The perchlorate of the methyl substituted ligand has been crystallized in two modifi­cations that differ in the twisting of the aromatic rings and in the coordination of the perchlorate anions.