Polydentate Lewis acids

B. Aluminum, Gallium and Indium Polydentate Lewis Acids. 73... 

Bidentate boranes with an o-phenylene backbone constitute some of the simplest examples of polydentate Lewis acids with rigid backbones. They can be prepared by the reaction of boron halides with a 1,2-dimetallated benzene derivative. Thus, the reaction of 1,2-bis(chloromercurio)benzene (5) with boron trichloride affords 1,2-bis(dichloroboryl)benzene (6, Scheme 3). ... 

In comparison to their boron analogs, polydentate Lewis acids containing the heavier main group elements are generally scarce. This state of affairs certainly... 

Ort/io-phenylene diboranes constitute another important class of polydentate Lewis acids which have been considered for the complexation of anions.In this context, most efforts have centered on the study of the ligative behavior of 1,2-bis(bis(pentaliuorophenyl)boryl)tetraliuorobenzene (17). Similar to 22, compound 17 forms chelate fluoride ([17- r2-F] ) and hydroxide ([17- r2-OH] ) complexes when treated with KF/18-C-6 and KOH/18-C-6, respectively (18-C-6 = 18-crown-6) (Scheme 35). The crystal structure of these anionic complexes has not been... 

A. Boron Polydentate Lewis Acids 1. Orfbo-Phenylene Boron Derivatives... 

Figure 2 Examples of mercury-based polydentate Lewis acids ...

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