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. 2021 Jul 7;11(39):23992–24000. doi: 10.1039/d1ra04738h

pKa values of 1H, 2H and 3H2 in DMSO determined by 1H NMR spectroscopy at 25 °C using different deprotonating agentsa.

Base 1H 2H 3H2
pKa,1 pKa,1 pKa,1 pKa,2
DIPEA 9.69(1) 9.41(1) 9.2(1) 10.65(6)
OAc 9.74(4) 9.6(1) 10.4(1)
H2PO4 9.72(1) 9.58(3) 9.5(1) 10.39(2)
a

Uncertainties are given in parentheses as standard deviation.