
TY  - JOUR
A1  - Farrell, JR 
A1  - Mctigue, P 
T1  - The Basicity of 2,6-Dimethyl-4-pyrone
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1985
VL  - 38
IS  - 6
SP  - 985
EP  - 989
KW  - 
UR  - https://doi.org/10.1071/CH9850985 
N2  - Conductimetric and spectrophotometric measurements of the Ka of protonated 2,6-dimethyl-4-pyrone have been made. The conductimetrically determined value of pKa = 0.17±0.03 was 0.2 pK units higher than the value of pKa = -0.02±0.05 found spectrophotometrically . The spectrophotometric studies in concentrated sulfuric and hydrochloric acids revealed that, at low acid concentrations, the pyrone had an excess acidity slope parameter (m&#8225;) of -0.29. However, over a large acid concentration range, m&#8225; was observed to vary in a way that caused moderate systematic errors in the excess acidity extrapolation procedure. For this reason the conductimetric value is considered more reliable. 
ER  -

