The alumino-organic combinations of the dioximes (DOxH 2 ) examined in this paper result from the substitution of the hydrogen bonds of oximes by alumino-organic groups. Relative to the same alumino-organic derivatives, diphenylglyoxime (DPGH 2 ) behaves similarly to dimethylglyoxime (DMGH 2 ). The chemical reactivity of DPGH 2 towards these alumino-organic compounds is, however, less than in the case of DMGH 2 . An exception is the monomer state of (DPG)[Al(i-C 4 H 9 ) 2 ] 2 in benzene solution. The behavior relative to amines of alkyl derivatives is similar to that found in coordinated oximes. In contrast, phenylaluminum derivatives of DMGH 2 and DPGH 2 are not soluble in amines. All compounds reported in this paper were separated from the reaction mixture as colored powders and were characterized by chemical analyses, IR spectroscopy, X-ray diffraction spectra and 1 H NMR. Finally, a comparison between the reactivity of free and coordinated dioximes is briefly considered. It is hoped that such comparisons will throw light on the problems associated with the reactivity of free and coordinated oxides versus alumino-organic compounds. Copyright