Conductance Study of Binding of Some Rb+ and Cs+ Ions by Macrocyclic Polyethers in Acetonitrile Solution
作者： Mojtaba Shamsipur , Mahboubeh Saeidi
关键词: Stability constants of complexes 、 Ion 、 Acetonitrile 、 Physical chemistry 、 Entropy (order and disorder) 、 Conductance 、 Inorganic chemistry 、 Chemistry 、 Ether 、 Enthalpy 、 Standard enthalpy of formation
摘要: A conductance study of the interaction between Rb+ and Cs+ ions and18-crown-6 (18C6), dicyclohexyl-18-crown-6 (DC18C6), dibenzo-18-crown-6 (DB18C6),dibenzo-24-crown-8 (DB24C8), dibenzo-30-crown-10 (DB30C10) inacetonitrile solution has been carried out at various temperatures. The formationconstants resulting 1:1 complexes were determined from molarconductance-mole ratio data found to vary in orderDC18C6 > 18C6 DB30C10 DB18C6 ∼ DB24C8for ion andDC18C6 DB24C8 DB18C6for ion. enthalpy entropy complexation fromthe temperature dependence formation constants. with the18-crowns are both stabilized while, case largecrown ethers, corresponding but entropydestabilized.
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