| dc.creator | DUNSTAN, PO | |
| dc.date | 1991 | |
| dc.date | MAY 10 | |
| dc.date | 2014-12-16T11:37:16Z | |
| dc.date | 2015-11-26T16:26:21Z | |
| dc.date | 2014-12-16T11:37:16Z | |
| dc.date | 2015-11-26T16:26:21Z | |
| dc.date.accessioned | 2018-03-28T23:07:08Z | |
| dc.date.available | 2018-03-28T23:07:08Z | |
| dc.identifier | Thermochimica Acta. Elsevier Science Bv, v. 181, n. 143, n. 154, 1991. | |
| dc.identifier | 0040-6031 | |
| dc.identifier | WOS:A1991FP33500013 | |
| dc.identifier | 10.1016/0040-6031(91)80419-J | |
| dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/58118 | |
| dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/58118 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/58118 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1268866 | |
| dc.description | The complexes AsX3.nL (where L = pyridine-N-oxide (pyNO), alpha, beta, or gamma-picoline-N-oxide (alpha, beta-, or gamma-piCONO), n = 1 or 2 for X = Cl, n = 1, 3/2 or 2 for X = Br and n = 1, 3/2 or 2 for X = I) were prepared and characterised by melting point, elemental analysis, thermogravimetric studies and infrared spectroscopy. From the enthalpies of dissolution in ethanol or 50% 2.4 N HCl in ethanol of the complexes, arsenic trihalides and ligands at 298.15 K, the standard enthalpies (DELTA-(r)H-kelvin) for the Lewis acid/base reactions were determined. From the DELTA-(r)H-kelvin values, the standard enthalpies of formation of arsenic trihalides and the standard enthalpies of formation of the ligands, the standard enthalpies of formation of the complexes (DELTA-(f)H-kelvin) were calculated. The standard enthalpies of decomposition of the complexes (DELTA-(D)H-kelvin), as well as the lattice standard enthalpies (DELTA-(M)H-kelvin) and the standard enthalpies of the Lewis acid/base reactions in the gaseous phase (DELTA-(r)H-kelvin(g)), were calculated by means of thermochemical cycles, and the mean standard enthalpies of the arsenic-oxygen bonds (DBAR (As-O)) were estimated. The mean energies of the As-O bonds range from 98 to 125 kJ mol-1 in these complexes. The thermochemical data suggested the order AsCl3 > AsBr3 > AsI3 for acidity and gamma-piCONO > pyNO > alpha-piCONO for basicity. Correlation between several of the thermochemical parameters, and between the thermochemical parameters of these complexes and parameters of the complexes of non-oxidized ligands, were established. | |
| dc.description | 181 | |
| dc.description | 143 | |
| dc.description | 154 | |
| dc.language | en | |
| dc.publisher | Elsevier Science Bv | |
| dc.publisher | Amsterdam | |
| dc.publisher | Holanda | |
| dc.relation | Thermochimica Acta | |
| dc.relation | Thermochim. Acta | |
| dc.rights | fechado | |
| dc.rights | http://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy | |
| dc.source | Web of Science | |
| dc.subject | Vaporization | |
| dc.title | THERMOCHEMISTRY OF PYRIDINE-N-OXIDE AND PICOLINE-N-OXIDE COMPLEXES OF ARSENIC TRIHALIDES | |
| dc.type | Artículos de revistas | |
