Chemistry:Diborane(4)

Diborane(4)
Names
	IUPAC name Diborane(4)
Identifiers
CAS Number	18099-45-1 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:38288 ;
Gmelin Reference	24760
PubChem CID	29529;
	InChI InChI=1S/B2H4/c3-1-2(3)4-1/h1-2H Key: NTSBJDTWOAARNU-UHFFFAOYSA-N ;
	SMILES [H]1[BH]2[H][BH]12;
Properties
Chemical formula	B2H4
Molar mass	25.65 g·mol−1
Related compounds
Related compounds	Bis(pinacolato)diboron; Diboron tetrafluoride; Tetrahydroxydiborane
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Diborane(4) is a transient inorganic compound with the chemical formula B₂H₄. Stable derivatives are known.

Diborane(4) has been produced by abstraction of two hydrogen atoms from diborane(6) using atomic fluorine and detected by photoionization mass spectrometry.^[1] Computational studies predict a structure in which are two hydrogen atoms bridging the two boron atoms via three-centre two-electron bonds in addition to the 2-centre, 2-electron bond between the two boron atoms and one terminal hydrogen atom bonded to each boron atom.^[2]

Several stable derivatives of diborane(4) have been reported.^[3]^[4]^[5]

References

↑ Ruščic, B.; Schwarz, M.; Berkowitz, J. (1989). "Molecular structure and thermal stability of B₂H₄ and B₂H+4 species". The Journal of Chemical Physics (AIP Publishing) 91 (8): 4576–4581. doi:10.1063/1.456745.
↑ Alkorta, Ibon; Soteras, Ignacio; Elguero, José; Del Beneb, Janet E. (23 June 2011). "The boron–boron single bond in diborane(4) as a non-classical electron donor for hydrogen bonding". Physical Chemistry Chemical Physics 13 (31): 14026–14032. doi:10.1039/C1CP20560A. PMID 21698334. Bibcode: 2011PCCP...1314026A. https://digital.csic.es/bitstream/10261/64351/1/accesoRestringido.pdf.
↑ Xie, Xiaochen; Haddow, Mairi F.; Mansell, Stephen M.; Norman, Nicholas C.; Russell, Christopher A. (2012). "Diborane(4) compounds with bidentate diamino groups". Dalton Transactions 41 (7): 2140–7. doi:10.1039/C2DT11936F. PMID 22187045.
↑ Wagner, Arne; Kaifer, Elisabeth; Himmel, Hans-Jörg (2012). "Diborane(4)–metal bonding: Between hydrogen bridges and frustrated oxidative addition". Chemical Communications 48 (43): 5277–9. doi:10.1039/C2CC31671D. PMID 22526934.
↑ Horn, Julian; Widera, Anna; Litters, Sebastian; Kaifer, Elisabeth; Himmel, Hans-Jörg (2018). "The proton affinity, HOMO energy and ionization energy of electron-rich sp³–sp³-hybridized diborane(4) compounds with bridging guanidinate substituents can be varied by substitution". Dalton Trans. 47 (6): 2009–2017. doi:10.1039/C7DT04433J. PMID 29345706.