Termoquimica de adutos entre tribenzil e trietilfosfinoscidos com cloretos dezinco, cadmio e mercurio (II)

AUTOR(ES)

Jose Claudio de Queiroz

DATA DE PUBLICAÇÃO

1979

RESUMO

The standard enthalpy change (DrH) for the reaction: MCl2(s) + nL(s) = I M(L)nCl2 I(s); DrH (where M = Zn, Cd, Hg(II), L = TBPO (Tribenzilphosphineoxide) and TEPO (Trietilphosphineoxide) and n = 1 or 2; was measured by using solution calorimetry. The standard enthalpy change due to the sublimation of ligands (DsH) was also measured. By using these data together with others found in the literature, it was possible to calculate DMH and DDH, namely. I M(L)nCl2 I(s) = MCl2(g) + nL(g); DMH I M(L)nCl2 I(s) = MCl2(s) + nL(s); DDH as well as the standard enthalpy of formation (DfH) for these ligands and adducts. From mass spectra and thermal data it was observed that these adducts seemingly do not exist in appreciable amounts, except in the solid state. Assuming that the sublimation enthalpy of complex and pure ligand, are the same it was possible to calculate the bond enthalpy metal-ligand DH (M...O).

ASSUNTO(S)

termoquimica quimica

Documentos Relacionados

• Preparação, caracterização e termoquimica de adutos entre N, N-dimetilformamida com haletos de zinco (II), cadmio (II) e mercurio (II) : correlações termoquimicas entre estes adutos e similares com N, N-dimetilacetamida e tetrametilureia
• Termoquimica de adultos de ligantes heterociclicos com cloretos de zinco, cadmio e mercurio
• Termoquimica dos adultos entre N,N-dimetilacetamida e haletos de zinco, cadmio e mercurio-II
• Termoquimica de adutos de tioacetamida e tiohenzamida com cloretos do grupo do zinco
• Sintese, caracterização e termoquimicade adutos entre metil, N, N -dimetil e tetrametilureia com haletos de zinco, cadmio e mercurio-II