Diethylaluminum fluoride

Hie study of effects of the catalyst components also help clarify the ionic factors in the steric control of isotactic polyvinylethers. Dall Asta and Bassi (15) studied the polymerization of butylvinylether with various alkylaluminum halides. They found that diethylaluminum chloride and ethylaluminum dichloride were the most effective catalysts for the production of isotactic polymer. Ethylaluminum dibromide and ethoxyaluminum dichloride were of questionable effectiveness, while diethylaluminum fluoride was completely ineffective. 

B-Bromocatecholborane, 47 Bromodimethylborane, 47 B-Chlorocatecholborane, 47 Chlorotriisopropoxytitanium, 213, 226 Copper(II) bromide, 112 Dialkylboryl trifluoromethane-sulfonates, 340 Dichlorobis( 1 -phenylethoxy)-titanium(IV), 12 Dichlorobis(trifluoromethane-sulfonato)titanium(IV), 102 Dichlorodiisopropoxytitanium(I V), 12 Diethylaluminum chloride, 173 Diethylaluminum fluoride, 25 Dimethylaluminum chloride, 5 Ethylaluminum dichloride, 5, 44, 306 Ferric chloride, 133 Ferric chloride-Silica, 134 Isobutyl(2,4,6-tributylphenoxy)-aluminum trifluoromethanesulfonate, 113... 

Metal-containing compounds, Aluminum Compounds (Continued) Dichlorobis(cyclopentadienyl)titanium-Trimethylaluminum, 71 Diethylaluminum chloride, 173 Diethylaluminum fluoride, 25 Diiodomethane-Triisobutylaluminum, 114... 

Dimethylaluminum cyanide is tetrameric in benzene solution (46), while dimethylaluminum fluoride and diethylaluminum fluoride exhibit even higher degrees of association, which depend very much on the dilution... 

This cleavage usually also provides, as a minor product, the ketone 3, formed by an intramolecular Meerwein-Ponndorf-Verley reduction and Oppenauer oxidation -Alkoxy ketones of this type (6) can be obtained as the major product by reduction of ketals (5) with diethylaluminum fluoride (1.2 equiv.) and pentafluorophenol (2.4 equiv.), (equation II). Note that the reduction is again effected with retention. 

Deviations from this general behavior are found with various alkyl aluminum alcoholates. Since alkoxy ions, OR, are stronger Lewis bases than the halogen ions, the Lewis acidity of the dialkylalkoxy alanes formed with the hypothetical Lewis acid R2A1+ (32) is low, i.e., there is little tendency to form complexes with weak bases. Accordingly, diethylaluminum alcoholate forms stable salts with potassium and cesium fluoride but not with sodium fluoride. The tendency to form complexes (e.g., with KF and NaH) increases in going from R2A10R to RAl(OR)2 (Fig. 9) (156, 322). Thus the... 

Powdered triethyltin fluoride added gradually with stirring at —30° to diethylaluminum hydride, and kept 2hrs. at 20° triethyltin hydride. Y <... 

Related Reagents. Antimony(V) Fluoride Boron Trifluoride Etherate Diethylaluminum Chloride Dimethylaluminum Chloride Ethylaluminum Dichloride Methylaluminum Dichloride Tin(IV) Chloride Titanium(IV) Chloride Triethylaluminum Trimethylaluminum. 

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