Cyclohexanones lithiated dimethylhydrazone

The azaallyl oidates, Le. enolates derived from ketone imines or hydrazones are synthetic equivalents of the ketone endates and thus two examples of azaallyl enolates are included in th section. Lithiated cyclrdiexanonephenylimine (151) crystallizes out of hydrocarbon solution as the dimeric diisopropylamine solvate (152). Significant disorder between the cyclohexyl and the phoiyl moieties is obse ed in this crystal structure however, it is clear that there are no V-az yl carbm contacts in this structure. This lithiated imine structure can be compared with the lithittted dimethylhydrazone of cyclohexanone... 

Figure 3 Molecular structure of the asymmetric unit of lithiated cyclohexanone dimethylhydrazone polymer (hydrogen positions have been left off for clarity) ...

The solid state structures (as well as those in solution) have been determined for the dimeric species (i) lithiated 2-Me02 Cyclohexanone dimethylhydrazone... 

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