Thermodn. of ionization of Cu(I)2+ (II) and Zn(I)2+ (III) were detd. and compared with data for Cu(Q)2+ (IV, Q = diethylenetriamine) and Zn(Q)2+ (V). The similar stabilities of II and IV are explained by offsetting differences in enthalpy and entropy terms. Comparison of III and V indicates a cyclic effect enhancing the stability of III; this effect is attributed solely to the enthalpy differences, since the entropy differences would stabilize V.
Cyclic effects with medium ring triamines. Enthalpy and entropy contributions to the solution stability of copper(II) and zinc(II) complexes with 1,4,7-triazacyclononane
FABBRIZZI, LUIGI;
1977-01-01
Abstract
Thermodn. of ionization of Cu(I)2+ (II) and Zn(I)2+ (III) were detd. and compared with data for Cu(Q)2+ (IV, Q = diethylenetriamine) and Zn(Q)2+ (V). The similar stabilities of II and IV are explained by offsetting differences in enthalpy and entropy terms. Comparison of III and V indicates a cyclic effect enhancing the stability of III; this effect is attributed solely to the enthalpy differences, since the entropy differences would stabilize V.File in questo prodotto:
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