Derivatives of Alcohols with Donor Termini

In solution [R2Al(p-( , / )]2 compounds exhibit a considerably greater structural variety than in the solid state, depending on the nature of the bifunctional ligand. The observation of equilibria between four-coordinate mOTiomeric chelate 16 and dimeric 17 compounds (Eq. 4) and the five-coordinate dimer 18 was shown to be due to the fluxional behavior of hemilabile monoanimiic 0, R -Iigands. 

Practical applications of organoaluminum derivatives of alcohols with -NR2 donor termini have begun to be exploited in recent years. Thus, [R2Al(n-0, R )]2 compounds have proven to be useful reagents for C-C bond formation [130, 131, 288]. More recently, new chiral Al(IIl) complexes derived from readily accessible Cinchona alkaloids have been used as unprecedented building blocks for the 

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