Some metal-ion complexes with ligands formed by reaction of amines with aliphatic carbonyl compounds. Part III. Some compounds formed by reaction of 1,3-diaminopropane nickel(II) compounds with acetone

Abstract

Bis(1,3-diaminopropane)nickel(II) salts react with acetone to give bisisopropylideneamino-complexes, as singlet ground state salts for ClO₄^– and BF₄^– or as triplet ground state di-acido-derivatives for NO₃^– NCS^– or Cl^– In the presence of a third mol of the diamine reaction continues to yield salts of a cation with a tetradentate ligand formed from two diamine residues linked by an ‘amine-imine bridge’ derived from two acetone residues, and with an additional isopropylideneamino group. Reaction continues, the final product having a tetra-azacyclohexadeca-diene ligand formed from two diamine residues linked by two such bridges. For the nitrate, an intermediate triplet ground state compound with a pentadentate β-aminoketone ligand and one co-ordinated nitrato-group was isolated.