Journal of Physical Chemistry p. 64 - 68 (1981)
Update date:2022-08-10
Topics:
Barbucci, Rolando
Barone, Vincenzo
Micheloni, Mauro
Rusconi, Luisa
In an attempt to give further insight into the effect of increasing methylation on the protonation of polyamines we studied the tetramines hexamethyltriethylenetetramine (trienMe6) and N,N,N"',N"'-tetramethyltriethylenetetramine (trienMe4).The results are discussed with special reference to the related compound triethylenetetramine (trien).Different methylation of both terminal and inner nitrogens apparently affects the thermodynamic functions.The ΔG0, ΔH0, and ΔS0 values suggest a unique protonation mechanism starting with the terminal nitrogen atoms.The stepwise entropy chenges are discussed on the basis of the releasing of water molecules.
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