Hexaborane(10)

Chemical compound From Wikipedia, the free encyclopedia

Hexaborane, also called hexaborane(10) to distinguish it from hexaborane(12) (B6H12), is a boron hydride cluster with the formula B6H10. It is a colorless liquid that is unstable in air.[1]

Quick facts Identifiers, Properties ...
Hexaborane(10)
Identifiers
3D model (JSmol)
  • InChI=1S/B6H10/c7-1-2-3(1)4(1,7)6(3,9-4)5(2,3,8-2)10-6/h1-6H
    Key: RNDYOGWDQULVQP-UHFFFAOYSA-N
  • [BH]1234[BH]5([H]6)[BH]61([H]7)[BH]72([H]8)[BH]83([H]9)[BH]945
Properties
B6H10
Molar mass 74.94 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Structure

NMR interpretation of hexaborane(10), showing its structure

Hexaborane(10) is classified as a nido-cluster.[2]: 152  The boron atoms define a pentagonal pyramid, with four bridging hydrogen atoms and six terminal ones. The point group of the molecule is Cs.[3]

Preparation and reactions

A laboratory route begins with bromination of pentaborane(11) followed by deprotonation of the bromide to give [BrB5H7]−. This anionic cluster is reduced with diborane to give the neutral product:[1]

K[BrB5H7] + 1/2 B2H6 → KBr + B6H10

It can also be generated by pyrolysis of pentaborane(11).

B6H10 can be deprotonated to give [B6H9]− or protonated to give [B6H11]+.[1] It can act as a Lewis base towards reactive borane radicals, forming various conjuncto-clusters.[2]: 162 

References

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