Aluminum Borohydride
Structural Formula Vector Image
Title: Aluminum Borohydride
CAS Registry Number: 16962-07-5
CAS Name: Aluminum tetrahydroborate
Molecular Formula: AlB3H12
Molecular Weight: 71.51
Percent Composition: Al 37.73%, B 45.35%, H 16.91%
Line Formula: Al(BH4)3
Literature References: Prepn from alkali metal hydride and aluminum halide: Schlesinger et al., J. Am. Chem. Soc. 75, 209 (1953); Hinkamp, Hnizda, Ind. Eng. Chem. 47, 1560 (1955); Kollonitsch, Fuchs, Nature 176, 1081 (1955); Hinkamp, US 2854312 (1958 to Ethyl Corp.); Schechter, US 2913306 (1959 to Callery Chem.); from trimethylaluminum and diborane: Schlesinger et al., J. Am. Chem. Soc. 61, 536 (1939).
Properties: Liquid. mp -64.5°; bp 44.5°; bp119 0°. Reacts vigorously with water and hydrogen chloride to liberate hydrogen; ignites in air; decomposes slowly even at room temp evolving hydrogen. Forms addn products with dimethyl ether, trimethylamine and ammonia.
Melting point: mp -64.5°
Boiling point: bp 44.5°; bp119
Use: Reducing agent; prepn of borohydrides of heavy metals; fuel for jet engines and rockets.

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