Synthetic Route of 14098-44-3. Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 14098-44-3, Name is Benzo-15-crown-5. In a document type is Article, introducing its new discovery.
A Conductance Study of Alkali Metal Ion-Benzo-15-crown-5 Complexes in Propylene Carbonate
The formation constants (KML+) for 1:1 complexes of benzo-15-crown-5 (B15C5) with alkali metal ions at 25 deg C, and the enthalpy (DeltaH) and entropy changes (DeltaS) of the K+-B15C5 complex in propylene carbonate (PC) have been determined conductometrically.The KML+ series of B15C5 for the alkali metal ions are given in the order Na+>Li+>K+>Rb+>Cs+.The selectivity tendency of B15C5 for the alkali metal ions is consistent with the size-fit concept, however, B15C5 shows poor selectivity.Both the DeltaH and DeltaS values for the complexation reaction of B15C5 with K+ are negative.In the cases of Na+, K+, Rb+, and Cs+, the size of the moving entity in PC is larger for the B15C5 complex than for the corresponding alkali metal ion, while, in the case of Li+, that is completely the reverse.
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Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare