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Hexaborane(10)
Identifiers
CAS Number	23777-80-2;
	InChI InChI=1S/B6H10/c7-1-2-6(1)3(7)9-5(6)10-4(6)8-2/h1-6H Key: JLQWWRKFGJQFTI-UHFFFAOYSA-N;
Properties
Chemical formula	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). Infobox references

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]

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 C_s.^[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

^ ^a ^b ^c Remmel, R. J.; Johnson, H. D.; Brice, V. T.; Shore, S. G.; Gaines, D. F. (1979). "Hexaborane(10)". Inorganic Syntheses. 19: 247–253. doi:10.1002/9780470132500.ch58. ISBN 9780470132500.
^ ^a ^b Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
^ Hirshfeld, F. L.; Eriks, K.; Dickerson, R. E.; Lippert, E. L.; Lipscomb, William N. (1958). "Molecular and Crystal Structure of B6H10". The Journal of Chemical Physics. 28 (1): 56–61. Bibcode:1958JChPh..28...56H. doi:10.1063/1.1744080. ISSN 0021-9606.

[IS-1] Remmel, R. J.; Johnson, H. D.; Brice, V. T.; Shore, S. G.; Gaines, D. F. (1979). "Hexaborane(10)". Inorganic Syntheses. 19: 247–253. doi:10.1002/9780470132500.ch58. ISBN 9780470132500.

[:0-2] Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.

[3] Hirshfeld, F. L.; Eriks, K.; Dickerson, R. E.; Lippert, E. L.; Lipscomb, William N. (1958). "Molecular and Crystal Structure of B6H10". The Journal of Chemical Physics. 28 (1): 56–61. Bibcode:1958JChPh..28...56H. doi:10.1063/1.1744080. ISSN 0021-9606.

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