The structure of the title compound, C8H9NO3, has been determined in o
rder to compare the molecular structures of uncomplexed and complexed
5-alkoxy-1,2-benzoquinone 2-oxime, and those of 5-alkoxy- and 5-alkyla
mino-1,2-benzoquinone 2-oxime. The title compound has a stronger quino
id character than the 5-methoxy derivative complexed to cobalt(III) an
d shows less charge delocalization than the 5-alkylamino derivative.