Related Products of 33100-27-5. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane. In a document type is Article, introducing its new discovery.
The interactions of 18-crown-6, 15-crown-5, and 12-crown-4 with Na+ and K+ were studied in methanol and water as solvents at 25 deg C. DeltaG0 values for both 1:1 and 2:1 complexation reactions were determined by potentiometric titrations.Used in conjunction with these values, calorimetric measurements led to DeltaH0 and DeltaS0 values.The thermodynamic parameters obtained cannot be correlated with the cations or the crown ethers “hole” sizes in any 1:1 or 2:1 reactions.Moreover, the DeltaG0 values are the results of quite different but permanently compensating combinations of the DeltaH0 and DeltaS0 values.These arise from several thermodynamic processes in which the role of the solvent must be considered.In the case of 18-crown-6, we present a quantitative interpretation in which this crown ether develops interactions that are stronger with Na+ than with K+.
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