Thermochemical and structural studies of Cu(II) and Ni(II) complexes with N,N-diethyl-N '-pivaloylthiourea

• Tipo: Artigo em Revista Científica Internacional
• Data: 2003

Autores

da Silva, MAVR (Autor) FCUP; da Silva, MDMCR (Autor) FCUP; da Silva, LCM (Autor) Outra; Gomes, JRB (Autor) Outra; Damas, AM (Autor) ICBAS; Dietze, F (Autor) Outra; Hoyer, E (Autor) Outra

Revista

Título: Inorganica Chimica Acta

Vol. 356

Páginas: 95-102

ISSN: 0020-1693

Editora: Elsevier

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 10 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-000-E55

DOI: 10.1016/s0020-1693(03)00268-8

Abstract (EN): The standard (p(0) = 0.1 MPa) molar enthalpies of formation of crystalline bis(N,N-diethyl-N'-pivaloylthioureato)copper(II), Cu(PVET)(2), and bis(N,N-diethyl-N'-pivaloylthioureato)nickel(II), Ni(PVET)(2), were measured, at T = 298.15 K, by solution-reaction isoperibol calorimetry. The standard molar enthalpies of sublimation, at T = 298.15 K, of both complexes were obtained using a Knudsen effusion technique. These values were used to derive the standard molar enthalpy of formation of Cu(PVET)(2) and Ni(PVET)(2) in gaseous phase, and to evaluate the difference between the mean metal-ligand and the hydrogen-ligand bond dissociation enthalpies, in these compounds. The N-H homolytic bond dissociation enthalpy in N,N-diethyl-N'-pivaloylthiourea ligand (HPVET) was calculated by high-level density functional theory based calculations. The three-dimensional structures of Cu(PVET)(2) and Ni(PVET)(2) are presented and show a planar coordination around the metal in both molecules.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8