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Type: Artigo de periódico
Title: Thermochemistry of liquid adducts of amides formed from AsX3 (X = Cl, Br)
Author: Santos, LCR
Souza, AG
Airoldi, C
Abstract: Liquid adducts of the general formula AsX3L (X=Cl, Br; L=N,N-dimethylformamide (DMF), N,N-dimethylacetamide (DMA), tetramethylurea (TMU)] were synthesized and characterized by elemental analysis, IR spectroscopy and mass spectra. From enthalpies of dissolution (Delta(i)H(m)(0)) in 1,2-dichloroethane at 298.15 K and the appropriate thermochemical cycle, standard molar enthalpies have been determined for Lewis acid-base reaction (Delta(r)H(m)(0)), formation (Delta(f)H(m)(0)), decomposition (Delta(D)H(m)(0) or Delta(M)H(m)(0)), Lewis acid-base reaction in gas phase (Delta(f)H(m)(0)) and the mean arsenic-oxygen bond enthalpies, [D] (As-O). These thermochemical parameters give the acidity AsCl3>AsBr3 and basicity TMU>DMA>DMF. (C) 1998 Elsevier Science B.V.
Subject: arsenic
Country: Holanda
Editor: Elsevier Science Bv
Citation: Thermochimica Acta. Elsevier Science Bv, v. 317, n. 2, n. 99, n. 103, 1998.
Rights: fechado
Identifier DOI: 10.1016/S0040-6031(98)00357-8
Date Issue: 1998
Appears in Collections:Unicamp - Artigos e Outros Documentos

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