Abstract
In the title compound, C6H12O3, which has a sterically demanding tert-butyl group attached to a hydroxyacetic acid residue, centrosymmetric hydrogen-bonded dimers are formed; the hydroxy OH group functions as the donor and the double-bonded O atom of the carboxyl group functions as the acceptor. The dimer engages in interdimer bonding through four shorter hydrogen bonds involving two donors (the carboxyl OH) and two acceptors (the hydroxyl O atom). A three-dimensional system of hydrogen bonds is established that has channels for the hydrophobic butyl groups along (0, 0, z) and (1\over2, 1\over2, z). There are two independent molecules in the asymmetric unit.
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