Table 5. pKa Values for Three Hexa-amino Cyclotriphosphazenes and the Indicators and Acid Used in Each Titration.
analyte | pKadet (±0.1) | indicators | acid |
---|---|---|---|
IPPN (R = NHiPr) | 11.65 | dea, pyr | barbituric |
BnPN (R = NHBn) | 9.80 | mor,a dea | barbituric |
morphPN (R = N(CH2CH2)2O) | 4.22 | lut, izl | saccharin |
Morpholine.27