Supramolecular assembly of 1,3-diaminopropane and its unusual conversion by macrocyclic nickel(II) complex

The reaction of macrocyclic nickel(II) complex [NiL](ClO4)2 (1) with 1,3-diaminopropane affords a novel complex with the formula [NiL(a.a.)2](ClO4)2 (2), where L = 3,10-bis(2-hydroxyethyl)-1,3,5,8,10,12-hexaazacyclotetradecane, a.a. = H3N+(CH2)4COO−(5-aminovaleric acid ion), which reveals that the organic ligand 1,3-diaminopropane is converted during the process of the reaction.