Show the hydrides of boron and aluminium, Chemistry

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Q. Show  the Hydrides of Boron and Aluminium?

Boron forms a series of volatile hydrides which resemble in some respects, e.g., volatility and covalent nature, the hydrides of carbon and silicon. The boron hydrides are generally called boranes by analogy with the alkanes and silanes. In view of its trivalency, boron is expected to form a simple hydride BH,, but it is unstable. The simplest stable hydride of boron is diborane B2H6. There are about dozen well characterised boron's which correspond to the following two stoichiometries: 

i) BnHn+4 : B2H6, B5H9, B6H10, BS8H12, B10H14, B18H22 and iso-B1,H2,

ii) BnHn+6: B4H10 B5H11, B6H12, BS9H15, B10H16, B

Boranes are usually named by indicating the number of B atoms with a prefix and the number of hydrogen atoms by an arabic number in parenthesis. For example, B4,H10, is named as tetraborane(l0) and B,H,, as nonaborane(l5). The hydride, B2H6 is simply called diborane as the compound of stoichiometry B2H8 is not known.


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