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Type: Artigo de periódico
Title: Thermochemistry of aniline-derivative adducts of nickel(II) acetylacetonate
Author: Dunstan, PO
Abstract: The compounds [Ni(acac)(2)(L)(2)] (where acac is acetylacetonate and L is aniline (an), 2,6-dimethylaniline (dimean), o- or m-chloroaniline (o- or m-clan)) were synthesized and characterized by melting points, elemental analysis, TG-DTG, and DSC curves and electronic and IR spectroscopy. The enthalpies of dissolution of the adducts, Ni(II) acetylacetonate and ligands in a 1 : 3 (v/v) mixture of aqueous HCl 1.2 M and methanol, were measured and by using thermochemical cycles the following thermochemical parameters for the adducts have been determined: The standard enthalpies for the Lewis acid/base reaction (Delta(r)H(theta)), the standard enthalpies of formation (Delta(f)H(theta)), the standard enthalpies of decomposition (Delta(D)H(theta)), the lattice standard enthalpies (Delta(M)H(theta)) and the standard enthalpies of the Lewis acid/base reactions ire the gaseous phase (Delta(r)H(theta)(g)). The mean standard enthalpies of the nickel-nitrogen bonds have been estimated. (C) 1999 Elsevier Science B.V. All rights reserved.
Subject: Ni-N bonds
nickel(II) acetylacetonate adducts
thermochemical parameters
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/S0040-6031(99)00084-2
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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