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|Type:||Artigo de periódico|
|Title:||Interaction Of N-acylthiourea Nickel(ii) Chelates With Nitrogen Bases In Solution And In The Solid State|
|Abstract:||In this work we report the study of adduct formation in solution and in the solid state between bis-N,N-diethyl-N′-benzoylthiourea)Ni(II) and bis(piperidil-N′-benzyolthiourea)Ni(II) and some nitrogen bases. Thermodynamic data and equilibrium constants were determined by calorimetric and spectrophotometric methods. The log β1 and log β2 values are between 0.24 and 1.78 while the -ΔH1 and -ΔH2 values are between 14.4 and 77.8 kJ mol-1. These results suggest that the adducts have low stability, i.e. the nickel chelates interact with the ligands only with difficulty. In the solid state the adducts show a small thermal stability, with the ligands being lost below 100°C. The infrared spectra were recorded between 4000 and 180 cm-1. The stretching frequencies were assigned for the adducts between 430 and 490 cm-1 for νNiO, 320 and 410 cm-1 for νNiS and 215-230 cm-1 for νNiN bands. © 1984.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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