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Hydrides and related complexes

Other group trends will emerge in subsequent sections. However, it is worth noting here an [Pg.227]

Al-H distances suggests that 3-centre 2-electron bonding occurs as in the boranes (p. 157). The closest Al - Al distance is 324 pm, which is appreciably shorter than in metallic A1 (340 pm), but there is no direct metal-metal bonding and the density of AIH3 (1.477 gcm ) is markedly less than that for A1 (2.699 gcm ) this is because in A1 metal all 12 nearest neighbours are at 340 pm whereas in AIH3 there are 6 A1 at 324 and 6 at 445 pm. [Pg.228]

AIH3 is best prepared by the reaction of ethereal solutions of LiAlH4 and AICI3 under very carefully controlled conditions °  [Pg.228]

The LiCl is removed and the filtrate, if left at this stage, soon deposits an intractable etherate of variable composition. To avoid this, the solution is worked up with an excess of LiAlH4 and some added LiBITi in the presence of a large excess of benzene under reflux at 76-79°C. Crystals of o -A1H3 soon form. Slight variations in the conditions lead to other crystalline modifications of unsolvated AIH3, 6 of which have been identified. [Pg.228]

AIH3 readily forms adducts with strong Lewis bases (L) but these are more conveniently prepared by reactions of the type [Pg.228]

WiBERG and E. Amberger, Hydrides of the Elements of Main Groups I-IV, Chaps. 5 and 6, pp. 381-461, Elsevier, Amsterdam, 1971. [Pg.227]

S.8.4.2.3. by Reaction with Transition- or Inner-Transition-Metal Halide, Hydride and Related Complexes. [Pg.329]

Hajos, A. 1979, Complex Hydrides and Related Reducing Agents in Organic Synthesis, Elsevier Amsterdam New York... [Pg.369]

Base-addition Complexes of Aluminum Hydrides and Related Compounds... [Pg.638]

See other pages where Hydrides and related complexes is mentioned: [Pg.227]    [Pg.227]    [Pg.229]    [Pg.231]    [Pg.30]    [Pg.131]    [Pg.5291]    [Pg.227]    [Pg.227]    [Pg.229]    [Pg.231]    [Pg.130]    [Pg.133]    [Pg.5290]    [Pg.227]    [Pg.227]    [Pg.229]    [Pg.231]    [Pg.30]    [Pg.131]    [Pg.5291]    [Pg.227]    [Pg.227]    [Pg.229]    [Pg.231]    [Pg.130]    [Pg.133]    [Pg.5290]    [Pg.351]    [Pg.556]    [Pg.826]    [Pg.187]    [Pg.187]    [Pg.245]    [Pg.236]    [Pg.1150]    [Pg.4015]    [Pg.4578]    [Pg.575]    [Pg.100]    [Pg.245]    [Pg.230]    [Pg.135]    [Pg.162]   


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