Metal-ligand binding energies in copper (II) and nickel (II) complexes with tetradentate N2O2 Schiff base ligands

• Tipo: Artigo em Revista Científica Internacional
• Data: 2022

Autores

Silva, ALR (Autor) FCUP; Oliveira, PCFC (Autor) Outra; Goncalves, JM (Autor) FCUP; Morais, VMF (Autor) Outra; Maria D M C R Ribeiro da Silva (Autor) FCUP

Revista

Título: Inorganica Chimica Acta

Vol. 535

ISSN: 0020-1693

Editora: Elsevier

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 3 Citações

Outras Informações

ID Authenticus: P-00W-1HE

DOI: 10.1016/j.ica.2022.120845

Abstract (EN): This work constitutes a new contribution for understanding the relationship between the metal-ligand bonding and, indirectly, the inherent reactivity of metallic complexes with tetradentate N2O2 Schiff base ligands, being reported the energetic characterization of two transition metal complexes - (N,AT c -bis(salicylaldehydo)tetramethylenediiminate)nickel(II) and (N,N' -bis(salicylaldehydo)propylenediiminate)copper(II). The standard molar enthalpies of formation of these complexes were determined by solution-reaction calorimetry measurements. Their standard molar enthalpies of sublimation, at T = 298.15 K, were obtained by an effusion method. From these studies, the gas-phase enthalpies of formation of Ni(II) and Cu(II) complexes, at T = 298.15 K, were derived. Differences between the metal-ligand and mean hydrogen-ligand bond dissociation enthalpies were derived and discussed in structural terms, in comparison with identical parameters for complexes of the same metals with analogous tetradentate Schiff bases. High-level quantum chemical calculations have also been conducted, complementing the results obtained experimentally.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6