Alane, alkoxy

Adenosine triphosphate alkali metal complexes, 34 vanadyl complexes, 568 Alane, 123 amine adducts, 107 phosphine adducts, 111 Alane, alkoxy-, 124 Alane, amino-, 109 Alane, imino-, 109 Alkali metal complexes, 1-70 acid anions, 30 acid salts, 30 bipyridyl, 13 crown ethers cavity size, 38 cryptates... 

Niobium, tris(diethyldilhiocarbamato)oxy-stereochemistry, 1,82 structure, 1, 83 Niobium, tris(oxa ato)oxy-stereochcmistry, 1, 82 Niobium, tris(phcnylcncdirhio)-structure, 1, 63 Niobium alanate, 3, 685 Niobium complexes alkyl alkoxy reactions, 2, 358 amides, 2,164 properties, 2, 168 synthesis, 2, 165 applications, 6,1014 carbamicacid, 2, 450 clusters, 3, 672,673,675 hexamethylbenzene ligands, 3, 669 cyanides synthesis, 2, 9 p-dinitrogen, 3, 418 fluoro... 

A further synthetic approach to carbon-metal double bonds is based on the acid-catalyzed abstraction of alkoxy groups from a-alkoxyalkyl complexes [436 -439] (Figure 3.11). These carbene complex precursors can be prepared from alk-oxycarbene complexes (Fischer-type carbene complexes) either by reduction with borohydrides or alanates [23,55,63,104,439-445] or by addition of organolithium compounds (nucleophilic addition to the carbene carbon atom) [391,446-452]. 

Keywords Alkoxy alanes in CVD Siloxy alanes in CVD Meta-stable phases Nanocomposites Mechanisms in CVD... 

The general procedure to synthesize alkoxy and siloxy alanes using the alcohol or the silanol as starting materials is shown in Eqs. 1 and 2. 

Some of the molecular structures of alkoxy alanes or siloxy alanes have been obtained from single-crystal X-ray structure determination. In order to demonstrate the diversity of agglomeration of the monomeric species to oligomers or polymers, we will discuss some typical structures. 

We have shown that alanes substituted with alkoxy and siloxy ligands can be used very efficiently in CVD processes, either producing single ceramic phases or mixtures of several phases using only one single precursor molecule. As the processes discussed above are driven by chemical reactions within distinct molecules or in between two molecules, the phases formed are... 

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... 

Alkali trialkylalkoxy alanates (322) react with trialkyl boranes to give alkali tetraalkyl boranates (321). In this case the weakly acidic dialkyl-alkoxy alane is displaced by the more acidic trialkyl borane ... 

The reaction of trialkyl alanes with tertiary alcohols is worth mentioning in this connection, as only the first alkyl group is split off. The resulting dialkyl-steric screening of the AIO2AI bridge. They are also astonishingly stable to air oxidation (106, 107). 

Esterification s. Carboxylic acid esters from carboxylic acids, Redoxesterification Esters, active s. Carboxylic acid esters, active Etherates s. Alane etherates Ethers (s. a. Alkoxy...,... 

In the current approach to this problem, a choice was made to focus on polymers which were derived from diols. In part, diis decision was based on their potential to form not only linear, possibly soluble polymers, but also their known reactivity towardalkyl alanes. For example, it is well-known that the reaction products of an alcohol and an alkyl alane are an alkoxy alane and a hydrocarbon (eq. 1). Another reaction of importance to this chemistry is the redistribution reaction which can occur between an aluminum alkoxide and an alcohol (eq. 2). In the presence of large excesses of HOR, this reaction will proceed to the right, as written. 

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