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Reaction of 1,2-Quinone Monooximes and Their Metal Complexes with Dimethyl Acetylenedicarboxylate.-Different reaction behavior is observed for the title oximes, e.g. (I), and their metal complexes such as (IV). Transition-metal complexes give rise to cycloadducts such as (V) and (VI), whereas oximes and main-group metal complexes afford 1,2-addition products of type (III). -(BARJESTEH, H.; BRAIN, E. G.; CHARALAMBOUS, J.; GAGANATSOU, P.; THOMAS, T. A.; J.