Hemiketal
( \newcommand{\kernel}{\mathrm{null}\,}\)
A hemiketal is a compound that has the following general structural formula.
R1 = alkyl, aryl,
R2 = alkyl, aryl
R3 = alkyl
eg:
The functional group 1 in an organic molecule is called the hemiketal group; the carbon atom bearing the two oxygen atoms is the hemiketal carbon.
see also cyclic hemiketal, ketal, hemiacetal