Comparative Analysis of the Performance of Commonly Available Density Functionals in the Determination of Geometrical Parameters for Zinc Complexes

• Tipo: Outra Publicação em Revista Científica Internacional
• Data: 2009

Autores

Sergio F Sousa (Autor) FCUP; Emanuela S Carvalho (Autor) Outra; Diana M Ferreira (Autor) Outra; Isabel S Tavares (Autor) Outra; Pedro A Fernandes (Autor) FCUP; Maria Joao Ramos (Autor) FCUP; Jose A N F Gomes (Autor) FCUP

Revista

Título: Journal of Computational Chemistry

Vol. 30

Páginas: 2752-2763

ISSN: 0192-8651

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 44 Citações

Scopus - 46 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-003-DHV

DOI: 10.1002/jcc.21304

Abstract (EN): A set of 44 Zinc-ligand bond-lengths and of 60 ligand-metal-ligand bond angles from 10 diverse transition-metal complexes, representative of the coordination spheres of typical biological Zn systems, were used to evaluate the performance of a total of IS commonly available density functionals in geometry determination. Five different basis sets were considered for each density functional, namely two all-electron basis sets (a double-zeta and triple-zeta formulation) and three basis sets including popular types of effective-core potentials: Los Alamos, Steven-Basch-Krauss, and Stuttgart-Dresden. The results show that there are presently several better alternatives to the popular B3LYP density functional for the determination of Zn-ligand bond-lengths and angles. BB1K, MPWB1K, MPW1K, B97-2 and TPSS are suggested as the strongest alternatives for this effect presently available in most Computational chemistry software packages. In addition, the results show that the use of effective-core potentials (in particular Stuttgart-Dresden) has a very limited impact, in terms of accuracy, in the determination of metal-ligand bond-lengths and angles in Zinc-complexes, and is a good and safe alternative to the use of an all-electron basis set such as 6-31G(d) or 6-311G(d,p). (C) 2009 Wiley Periodicals, Inc. J Comput Chem 30: 2752-2763, 2009

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12