ISSN:
1572-8943
Keywords:
calorimetry
;
complex formation
;
crown ethers
;
guanidinium derivatives
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The complexation of urea and some guanidinium derivatives by the ligands 15-crown-5, 18-crown-6, benzo-18-crown-6 and diaza-18-crown-6 in methanol has been studied by means of calorimetric titrations. The complex formation is mainly favored by entropic contributions. The number of solvent molecules released during the complex formation is responsible for the stability of the complexes formed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1010120108944
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