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

• Type: Article in International Scientific Journal
• Date: 2022

Authors

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

Journal

Title: Inorganica Chimica Acta

Vol. 535

ISSN: 0020-1693

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 3 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6