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INTERACTION OF PYROPHOSPHATE ION WITH DI-AMINES, TRI-AMINES AND TETRAAMINES IN AQUEOUS-SOLUTION - A POTENTIOMETRIC AND CALORIMETRIC STUDY




TekijätLABADI I, JENEI E, LAHTI R, LONNBERG H

KustantajaMUNKSGAARD INT PUBL LTD

Julkaisuvuosi1991

Lehti:Acta Chemica Scandinavica

Tietokannassa oleva lehden nimiACTA CHEMICA SCANDINAVICA

Lehden akronyymiACTA CHEM SCAND

Vuosikerta45

Numero10

Aloitussivu1055

Lopetussivu1059

Sivujen määrä5

ISSN0904-213X

DOIhttps://doi.org/10.3891/acta.chem.scand.45-1055


Tiivistelmä
Successive macroscopic pK(a) values have been determined potentiometrically for the conjugate acids of spermidine (4-azaoctane-1,8-diamine), spermine (4,9-diazadodecane-1,12-diamine) and some acylic diamines at various ionic strengths in the absence and presence of tetrasodium pyrophosphate. The stability of the amine/pyrophosphate adducts have been estimated on the basis of effects of the pyrophosphate ion on the apparent acidity constants of the amines. Stoichiometry and thermodynamics of adduct formation have been elucidated from microcalorimetric measurements.


Research Areas



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