New copper(II), nickel(II) and zinc(II) complexes with 1,2,4-triazolo[1,5- a]pyrimidines and the chelating ligand 1,3-propanediamine: An unexpected coordination behavior for the 7-amine-derivative

1. Caballero, A.B.
2. Rodríguez-Diéguez, A.
3. Quirós, M.
4. Lezama, L.
5. Salas, J.M.