Ocak, Mirac published the artcileThermodynamic data for the formation of 1:1 and 2:1 complexes of ¦Á,¦Ø-diamino dihydrochlorides with 18-crown-6 in aqueous solution, Quality Control of 10517-44-9, the publication is Journal of Solution Chemistry (2008), 37(5), 595-601, database is CAplus.
Calorimetric titrations are used to study the interactions between the crown ether 18-crown-6 and several ¦Á,¦Ø-diamino dihydrochlorides in aqueous solution These complexes are formed by ion-dipole interactions between the pos. charged nitrogen atoms and the oxygen donor atoms of the crown ether. Depending on the exptl. conditions, the formation of 1:1 or 2:1 complexes (ligand:diamines) can be studied. The solvation of the ligand and the amines are responsible for the observed thermodn. values. The number of water mols. released during the reaction were calculated from the determined reaction entropies. Formation of 1:1 complexes distorts the solvation shell around the mols. As a result, the number of solvent mols. released during the formation of the 2:1 complexes is slightly smaller than the number released from formation of the 1:1 complex. No exptl. evidence is observed for the formation of 1:1 complexes between one crown ether and two protonated amino groups.
Journal of Solution Chemistry published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, Quality Control of 10517-44-9.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia