Chembox new
Name = Plumbane
ImageFile = Plumbane-2D.png ImageSize = 120
IUPACName = Plumbane
OtherNames = Plumbane, lead tetrahydride, tetrahydridolead, lead(IV) hydride
Section1 = Chembox Identifiers
CASNo = 15875-18-0

Section2 = Chembox Properties
Formula = PbH4
MolarMass = 211.23 g/mol
BoilingPt = -13 °C

Plumbane, PbH4, is a metal hydride comprised of lead and hydrogen. [Porritt, C. J. "Chem. Ind-London." 1975, "9", 398] Plumbane is not well-characterized or well-known, and it is thermodynamically unstable with respect to the loss of a hydrogen atom.Hein, T. A.; Thiel, W. "J. Phys. Chem." 1993, "97", 4381] Derivatives of plumbane include lead tetrafluoride, PbF4 and tetra-ethyl lead, (CH3CH2)4Pb.


Until recently, it was uncertain whether plumbane had ever actually been synthesized; [Cotton, F. A.; Wilkinson, G.; Murillo, C. A.; Bochman, M. "Advanced Inorganic Chemistry." Wiley: New York, 1999] although, in 1963, Saalfeld and Svec reported the observation of PbH4+ by mass spectrometry.Saalfeld, F. E.; Svec, H. "Inorg. Chem." 1963, "2", 46.] Plumbane has repeatedly been the subject of Dirac-Hartree-Fock relativistic calculation studies, which investigate the stabilities, geometries, and relative energies of hydrides of the formula MH4 or MH2. [Pyykkö, P.; Desclaux, J. P. "Chem. Phys. Lett." 1974, "29", 534] [Pyykkö, P.; Desclaux, J. P. "Nature." 1977, "266", 366]


Plumbane is an unstable colorless gas and is the heaviest group IV hydride. [ [ CRC Handbook of Chemistry and Physics, Online Edition.] ] Furthermore, plumbane has a tetrahedral (Td) structure with an equilibrium bond distance of 1.73 Å. [Visser, O.; Visscher, L.; Aerts, P. J. C.; Nieuwpoort, W. C. "Theor. Chem. Acc." 1991, "81", 405] By weight percent, the composition of plumbane is 1.91% hydrogen and 98.09% lead. In plumbane, the formal oxidation states of hydrogen and lead are -1 and +4, respectively. The stability of metal hydrides with the formula MH4 (M = Si-Pb) decreases as the atomic number of M increases.


In general, metal hydrides are formed when hydrogen gas is allowed to react with metals. They can serve to store hydrogen gas, which is highly flammable.

Early studies of PbH4 revealed that the molecule is unstable as compared to its lighter congeners (silane, germane, and stannane). [Malli, G. L.; Siegert, M.; Turner, D. P. "Int. J. Quantum. Chem." 2004, "99", 940] It cannot be made by methods used to synthesize GeH4 or SnH4.

Recently, plumbane has been synthesized from lead(II) nitrate, Pb(NO3)2, and sodium borohydride, NaBH4. [Krivtsun, V. M.; Kuritsyn, Y. A.; Snegirev, E. P. "Opt. Spectrosc." 1999, "86", 686] Additionally, a non-nascent mechanism for plumbane synthesis has been developed. [Yan, Z.; et al. "Guangpuxue Yu Guangpu Fenxi." 2005, "25", 1720]

In 2002, Wang, X. et al. carefully studied the preparation of PbH4 by laser ablation and additionally identified the infrared (IR) bands. [Wang, X.; Andrews, J. "J. Am. Chem. Soc." 2002, "125", 6581]


* Methane CH4
* Silane SiH4
* Germane GeH4
* Stannane SnH4


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Look at other dictionaries:

  • plumbane — ˈpləmˌbān noun ( s) Etymology: plumb + methane 1. : a compound of lead and hydrogen; especially : the unstable tetrahydride PbH4 2. : a deriv …   Useful english dictionary

  • plumbane — noun lead hydride, PbH …   Wiktionary

  • plumbane — plum·bane …   English syllables

  • Hydride — In chemistry, a hydride is the anion of hydrogen, H−, or, more commonly, a compound in which one or more hydrogen centres have nucleophilic, reducing, or basic properties. In compounds that are regarded as hydrides, hydrogen is bonded to a more… …   Wikipedia

  • Silane — This article is about the compound with chemical formula SiH4. For other silicon hydrogen compounds, see Silanes. Silane …   Wikipedia

  • Germane — Germanium tetrahydride …   Wikipedia

  • lead hydride — noun The unstable tetrahydride of lead, PbH, plumbane …   Wiktionary

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