Hexaborane(12)
Hexaborane(12) is an inorganic compound with the formula B6H12. It is an obscure member of the boranes. It is a colorless liquid that, like most boron hydrides, is readily hydrolyzed and flammable.
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3D model (JSmol) |
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| Properties | |
| B6H12 | |
| Molar mass | 76.96 g·mol−1 |
| Appearance | colorless gas |
| Melting point | −82.3 °C (−116.1 °F; 190.8 K) |
| Boiling point | 85 °C (185 °F; 358 K) (approx) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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The molecular structure conforms to C2 symmetry group. With the formula BnHn+6, it is classified as an arachno cluster. As such the boron positions match six of the boron positions in the closo-B8H2−
8.
Preparation
It is typically prepared by the cluster expansion method from B5H−
8, the conjugate base of pentaborane-9:[1]
- LiB5H8 + 1/2 B2H6 → LiB6H11
- LiB6H11 + HCl → B6H12 + LiCl
References
- Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8. p.172.
| Alkali metal (Group 1) hydrides |  Lithium hydride, LiH ionic metal hydride   Beryllium hydride Left (gas phase): BeH2 covalent metal hydride Right: (BeH2)n (solid phase) polymeric metal hydride   Borane and diborane Left: BH3 (special conditions), covalent metalloid hydride Right: B2H6 (standard conditions), dimeric metalloid hydride  Methane, CH4 covalent nonmetal hydride  Ammonia, NH3 covalent nonmetal hydride  Water, H2O covalent nonmetal hydride  Hydrogen fluoride, HF covalent nonmetal hydride | ||||||||||||||||||||
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| Alkaline (Group 2) earth hydrides |
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| Group 13 hydrides |
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| Group 14 hydrides |
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| Pnictogen (Group 15) hydrides |
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| Hydrogen chalcogenides (Group 16 hydrides) |
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| Hydrogen halides (Group 17 hydrides) | |||||||||||||||||||||
| Transition metal hydrides | |||||||||||||||||||||
| Lanthanide hydrides | |||||||||||||||||||||
| Actinide hydrides | |||||||||||||||||||||
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