Synthesis, characterization and molecular structures of Ni(II) complexes derived from Schiff base pyridylimine ligands

• Published in: Inorganica Chimica Acta 2015-11, Vol.438, p.146-152
• Main Authors: Pioquinto-Mendoza, J. Roberto, Rosas-Ortiz, Jaime Alberto, Reyes-Martínez, Reyna, Conelly-Espinosa, Patricia, Toscano, Rubén A., Germán-Acacio, Juan M., Avila-Sorrosa, Alcives, Baldovino-Pantaleón, Oscar, Morales-Morales, David
• Format: Article
• Language: English
• Subjects: Crystal structures; Nickel complexes; Non-covalent interactions; Pyridylimine ligands; Schiff base compounds; Supramolecular arrangements
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2015.09.016

Ni(II) complexes including the ligands N1,N4-bis(pyridin-2-ylmethylene)butane-1,4-diamine (L1) and N1,N4-bis(1-(pyridin-2-yl)ethylidene)butane-1,4-diamine (L2) where synthesized and their structures unequivocally determined by single crystal X-ray diffraction techniques. The subtle changes in the ligands define the ionic o neutral nature of complexes NiL1 and NiL2 exhibiting in both cases the ligands coordinated in a κ4-N,N,N,N-tetradentate fashion. [Display omitted] •New Ni(II) complexes with Schiff base pyridylimine ligands were synthesized in a facile manner in good yields.•The structures of the complexes NiL1 and NiL2 were unequivocally determined by X-ray diffraction techniques.•The subtle changes in the Schiff base ligands defines the ionic o neutral nature of the complexes.•Studies in the solid state reveal important non-covalent interactions. The synthesis and structural characterization of Ni(II) complexes derived from N1,N4-bis(pyridin-2-ylmethylene)butane-1,4-diamine (L1) and N1,N4-bis(1-(pyridin-2-yl)ethylidene)butane-1,4-diamine (L2) is described. The paramagnetic Ni(II) complexes NiL1 and NiL2 were fully characterized and their structures unequivocally determined by single crystal X-ray diffraction techniques. The molecular structures of NiL1 and NiL2 exhibited the ligands L1 and L2 coordinated in a κ4-N,N,N,N-tetradentate fashion. The subtle changes in the ligands defines the ionic o neutral nature of the complexes. Furthermore, in the solid state both complexes exhibit extended hydrogen-bond networks.