boron

• Formula: B
• Molecular weight: 10.811
• IUPAC Standard InChI: InChI=1S/B Copy

  
• IUPAC Standard InChIKey: ZOXJGFHDIHLPTG-UHFFFAOYSA-N Copy
• CAS Registry Number: 7440-42-8
• Chemical structure:
  This structure is also available as a 2d Mol file
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Ion clustering data
• Data at other public NIST sites:
  • NIST Atomic Spectra Database - Lines Holdings (on physics web site)
  • NIST Atomic Spectra Database - Levels Holdings (on physics web site)
  • NIST Atomic Spectra Database - Ground states and ionization energies (on physics web site)
  • Electron-Impact Ionization Cross Sections (on physics web site)
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Condensed phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Liquid Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Solid Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

(B⁺ • 10) +  = (B⁺ • 11)

By formula: (B⁺ • 10B) + B = (B⁺ • 11B)

(B⁺ • 11) +  = (B⁺ • 12)

By formula: (B⁺ • 11B) + B = (B⁺ • 12B)

(B⁺ • 9) +  = (B⁺ • 10)

By formula: (B⁺ • 9B) + B = (B⁺ • 10B)

(B⁺ • 2) +  = (B⁺ • 3)

By formula: (B⁺ • 2B) + B = (B⁺ • 3B)

(B⁺ • 3) +  = (B⁺ • 4)

By formula: (B⁺ • 3B) + B = (B⁺ • 4B)

(B⁺ • 5) +  = (B⁺ • 6)

By formula: (B⁺ • 5B) + B = (B⁺ • 6B)

(B⁺ • 8) +  = (B⁺ • 9)

By formula: (B⁺ • 8B) + B = (B⁺ • 9B)

(B⁺ • 4) +  = (B⁺ • 5)

By formula: (B⁺ • 4B) + B = (B⁺ • 5B)

(B⁺ • 6) +  = (B⁺ • 7)

By formula: (B⁺ • 6B) + B = (B⁺ • 7B)

(B⁺ • 7) +  = (B⁺ • 8)

By formula: (B⁺ • 7B) + B = (B⁺ • 8B)

(B⁺ • ) +  = (B⁺ • 2)

By formula: (B⁺ • B) + B = (B⁺ • 2B)

(CAS Reg. No. 12513-02-9 • 4294967295) +  = CAS Reg. No. 12513-02-9

By formula: (CAS Reg. No. 12513-02-9 • 4294967295B) + B = CAS Reg. No. 12513-02-9

B⁺ +  = (B⁺ • )

By formula: B⁺ + B = (B⁺ • B)

Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data evaluated as indicated in comments:
L - Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to B⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Hanley, Whitten, et al., 1988
Hanley, L.; Whitten, J.L.; Anderson, S.L., Collision - Induced Dissociation and ab initio Studies of Boron Cluster Ions. Determination of Structures and Stabilities, J. Phys. Chem., 1988, 92, 20, 5803, https://doi.org/10.1021/j100331a052 . [all data]

Wenthold, Kim, et al., 1997
Wenthold, P.G.; Kim, J.B.; Jonas, K.-L.; Lineberger, W.C., An Experimental and Computational Study of the Electron Affinity of Boron Oxide, J. Phys. Chem. A, 1997, 101, 24, 4472, https://doi.org/10.1021/jp970645u . [all data]

Scheer, Bilodeau, et al., 1998
Scheer, M.; Bilodeau, R.C.; Haugen, H.K., Negative ion of boron: An experimental study of the P-3 ground state, Phys. Rev. Lett., 1998, 80, 12, 2562-2565, https://doi.org/10.1103/PhysRevLett.80.2562 . [all data]

Feigerle, Corderman, et al., 1981
Feigerle, C.S.; Corderman, R.R.; Lineberger, W.C., Electron affinities of B, Al, Bi, and Pb, J. Chem. Phys., 1981, 74, 2, 1513, https://doi.org/10.1063/1.441174 . [all data]

Feldmann, Rackwitz, et al., 1977
Feldmann, D.; Rackwitz, R.; Heincke, H.; Kaiser, H.J., Photoabsolung von Elektronen der Ionen B-, Ga-, In-, Tl-, Ge-, und Pb-, Z. Naturforschung A, 1977, 32, 302. [all data]

Lide, 1992
Lide, D.R. (Editor), Ionization potentials of atoms and atomic ions in Handbook of Chem. and Phys., 1992, 10-211. [all data]

Kelly, 1987
Kelly, R.L., Atomic and ionic spectrum lines of hydrogen through kryton, J. Phys. Chem. Ref. Data, 1987, 16. [all data]

Murad and Hildenbrand, 1975
Murad, E.; Hildenbrand, D.L., Thermochemical properties of gaseous ZrO and ZrO₂, J. Chem. Phys., 1975, 63, 1133. [all data]

Brown, Tilford, et al., 1974
Brown, C.M.; Tilford, S.G.; Ginter, M.L., Absorption spectrum of B I in the 1350-1900-A region, J. Opt. Soc. Am., 1974, 64, 877. [all data]

Gingerich, 1971
Gingerich, K.A., Gaseous metal borides. III. The dissociation energy and heat of formation of gold monoboride, J. Chem. Phys., 1971, 54, 2646. [all data]

Moore, 1970
Moore, C.E., Ionization potentials and ionization limits derived from the analyses of optical spectra, Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.), 1970, 34, 1. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, References

• Symbols used in this document:
  

  EA	Electron affinity
  IE (evaluated)	Recommended ionization energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  S°liquid,1 bar	Entropy of liquid at standard conditions (1 bar)
  S°solid,1 bar	Entropy of solid at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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