Pentaborane

• Pentaboronnonahydrid
• Nido- borane Penta

Colorless liquid with an unpleasant odor

Liquid

0.61 g · cm -3

-46.7 ° C

58.4 ° C

220 mbar ( 20 ° C)

Decomposes in water

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Pentaborane (specifically, pentaborane (9) ) is a chemical compound selected from the group of the boranes.

Production and representation

Penta borane (9 ) can be obtained by thermolysis of diborane, forming as an intermediate thermolabile tetraborane that deals with existing diborane to Penta borane (11) ( B5H11 ) and converts this in turn partially Penta borane (9).

Properties

Penta borane ( 9) is a spontaneously flammable, volatile, colorless liquid with an unpleasant odor, which decomposes in water.

Use

Penta borane (9 ) was studied in the late 1950s in the U.S. and in the 1960s by Glushko in the USSR as rocket fuel. As with other fluorine and boron-containing fuels prevented the many problems in the handling and safety of the use.

Security Hein way

Upon contact of pentaborane with alcohols, ammonia, oxygen, esters, ethers, halogenated hydrocarbons and ketones may explode. It can also react in a dangerous manner when exposed to water, air and heat, wherein the boron compounds and hydrogen produced.