Aluminium trihydride

The aluminium tetrahydride anion donates a hydride anion irreversibly to the carbonyl carbon. The resulting alkoxide anion complexes with the aluminium trihydride. Write down this step of the reaction. 

The reaction of aluminium trihydride with a number of alcohols was studied in 1968 by Noth and Suchy (114). 

During the last decade, environmentalists have fought strongly to ban the use of brominated fire retardants, and already a number of plastics processors have voluntarily switched to non-halogenated ones (such as phosphate esters, aluminium trihydride and magnesium hydroxide fire retardants). Still, there are two contradictory forces in the fire retardant industry, one is the constant push for stronger fire-safety standards, and the other is the move to eliminate flame-retardants seen as persistent, bioaccumulative or toxic [19]. 

Phenyltin trihydride (PhSnH ). Again using the above procedure, reaction of l.Og of phenyltin trichloride (Research Chem.) and 0.60g of lithium aluminium hydride provided a hexane solution which was concentrated under nitrogen to a liquid (bp 35°C at 2.5 Torr). A portion was quickly weighed, dissolved in hexane at the g/ y1 level, and immediately diluted to a 1.0 ng/yl working standard. The neat product rapidly decomposed to a coloured, insoluble material however, the yg/ yl hexane solution gave (GC-MS) a single peak with m/e 197 (PhSn) and 120 (Sn) with correct isotopic distributions and a IR spectrum with Sn-H at 1892 cm (lit. 1880 cm ). 

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