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The enthalpy of solution of phosphates and hydrated phosphates of putrescine, spermine, spermidine and their homologes in water at 298.15 K

Zielenkiewicz A.

Bulletin of the Polish Academy of Sciences. Chemistry

1999

Vol. 47, No. 3

259-263

The results of determinations of the enthalpies of solution in water at 298.15 K of phosphates of putrescine (Put), spermine (Spill) and spermidine (Spd) and their hydrated phosphates and homologs: Put. 2H(3)PO4; Spd .3H(3)PO4; Spill .4H(3)PO4; Put . H(3)PO4 .2H(2)0; Put 3 .H(3)PO4 .H20; Spd .3/2H(3)PO4 .3H20; Spd3,3 .3/2H(3)PO4 .3H(2)O; Spd .3/2H(3)PO4 .6H(2)0; Spm .2H(3)PO(4) .6H20; Spm(3,3,3) .2H(3)PO(4) .4H(2)0 are presented. It was found for Spill .2H(3)PO(4) .6H(2)0 and Spm(3,3,3) .2H(3)PO(4) .4H(2)0 that the values of the enthalpies of solution depend strongly on concentration, which indicates the presence of not only solute-solvent but also solute-solute interactions in these solutions.