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1. In the reaction of sodium and lithium tetrahydroaluminates with R3A1 (R=CH3, C2H5, i-C4H9) at a reactant ratio of 1∶ 2, the corresponding dihydride complexes MA1R2H2 and dialkylhydroaluminums were formed. At a reactant ratio of 1∶1, the dialkylhydroaluminum and the dihydride complex MA1R2H2 were again formed except in the case of R=i-C4H9, when the trihydride complex NaAl(i-C4H9)H3 was obtained. 2. In the reaction between NaAlH4 and NaAl(i-C4H9)H2 in tetrahydrofuran or butoxydiisobutylaluminum, NaAl(i-C4H9)H3 is formed. 3. The trihydride complex NaAl(i-C4H9)H3 reacts with (i-C4H9)3Al with formation of NaAl(i-C4H9)2H2 and (i-C4H9)2AlH. 4. At temperatures of above 50°, dialkylhydroaluminums split tetrahydrofuran with formation of the dialkylbutoxyaluminums.

1. A study was made of the reaction of acetylene and of various monosubstituted acetylenes with lithium, sodium, and potassium aluminum hydrides, which leads to the formation of complex aluminum acetylides MA1(C ≡ CR)4. The general character of the reaction was shown. 2. The effect of solvents on the rate of this reaction was established, and its catalytic character was shown. Inhibitors for this reaction were found (RX, AlX3, R2AlH, R3Al). 3. In presence of a dialkylaluminum hydride the reaction between alkali metal aluminum hydrides and acetylenic compounds goes differently, depending on the solvent used. In a strongly solvating solvent the main course is the addition of the aluminum hydride at the triple bond with formation of complex alkenyl compounds. 4. The reaction of monosubstituted acetylenes with the complexes NaAlR(4-n)Hn was investigated. It was shown that steric factors affect the course of this reaction. In a hydrocarbon medium the reaction goes strictly selectively with formation of the mixed acetylides NaAlR(4-n)(C≡CR')n. In a solvating solvent metalation is accompanied to a greater or less degree, depending on the structure of the complex NaAlR(4_n)Hn, by addition at the triple bond. Small additions of a dialkylaluminum hydride suppress the metalation reaction.

The reduction of complex esters and carbonyl compounds in hydrocarbon media by aluminum hydrides of the alkali metals results in the formation of the corresponding alcohol in high yield. The reduction of nitriles proceeds with the formation of primary amines.

1. Sodium aluminum hydride reacts withα-olefins in the presence of such catalysts as AlR3, HAlR2, ClAlR2, AlX3, LiX, ZnX2, and LiAlH4 (X represents halogen), forming complexes with the structure NaAlR4. 2. In the oxidation of tetraalkyl complexes, alcohols are formed in high yields.

In the reduction of aromatic aldehydes of the benzene, naphthalene, pyridine, and ferrocene series with NaAlU4 in tetrahydrofuran solution, aldehydes were obtained in 65–85% yield. The reduction of aliphatic nitriles proceeds chiefly to the formation of the amines, while the aldehydes are formed in small yields (15–25%).

Sodium aluminum hydride reduces carboxylate esters and lactones in good yield to the corresponding aldehydes and hydroxy aldehydes.