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

• Type: Article in International Scientific Journal
• Date: 2003

Authors

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

Journal

Title: Inorganica Chimica Acta

Vol. 356

Pages: 95-102

ISSN: 0020-1693

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 9 Citations

Scopus - 10 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8