boron


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.

Quantity Value Units Method Reference Comment
Δfgas565. ± 5.kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Δfgas560.00kJ/molReviewChase, 1998Data last reviewed in June, 1983
Quantity Value Units Method Reference Comment
gas,1 bar153.436 ± 0.015J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar153.44J/mol*KReviewChase, 1998Data last reviewed in June, 1983

Gas Phase Heat Capacity (Shomate Equation)

Cp° = 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
    Cp = 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.

Temperature (K) 4137.895 to 6000.
A 20.65193
B 0.226427
C -0.112330
D 0.016889
E 0.008714
F 553.8654
G 178.4179
H 559.9991
ReferenceChase, 1998
Comment Data last reviewed in June, 1983

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

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Individual Reactions

(B+ • 10boron) + boron = (B+ • 11boron)

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

Quantity Value Units Method Reference Comment
Δr531. ± 50.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 11boron) + boron = (B+ • 12boron)

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

Quantity Value Units Method Reference Comment
Δr770. ± 150.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 9boron) + boron = (B+ • 10boron)

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

Quantity Value Units Method Reference Comment
Δr540. ± 75.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 2boron) + boron = (B+ • 3boron)

By formula: (B+ • 2B) + B = (B+ • 3B)

Quantity Value Units Method Reference Comment
Δr770. ± 150.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 3boron) + boron = (B+ • 4boron)

By formula: (B+ • 3B) + B = (B+ • 4B)

Quantity Value Units Method Reference Comment
Δr686. ± 59.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 5boron) + boron = (B+ • 6boron)

By formula: (B+ • 5B) + B = (B+ • 6B)

Quantity Value Units Method Reference Comment
Δr531. ± 67.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 8boron) + boron = (B+ • 9boron)

By formula: (B+ • 8B) + B = (B+ • 9B)

Quantity Value Units Method Reference Comment
Δr523. ± 50.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 4boron) + boron = (B+ • 5boron)

By formula: (B+ • 4B) + B = (B+ • 5B)

Quantity Value Units Method Reference Comment
Δr260. ± 59.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 6boron) + boron = (B+ • 7boron)

By formula: (B+ • 6B) + B = (B+ • 7B)

Quantity Value Units Method Reference Comment
Δr410. ± 50.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • 7boron) + boron = (B+ • 8boron)

By formula: (B+ • 7B) + B = (B+ • 8B)

Quantity Value Units Method Reference Comment
Δr380. ± 50.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

(B+ • boron) + boron = (B+ • 2boron)

By formula: (B+ • B) + B = (B+ • 2B)

Quantity Value Units Method Reference Comment
Δr410. ± 67.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

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

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

Quantity Value Units Method Reference Comment
Δr905. ± 12.kJ/molN/AWenthold, Kim, et al., 1997gas phase; B

B+ + boron = (B+ • boron)

By formula: B+ + B = (B+ • B)

Quantity Value Units Method Reference Comment
Δr75. ± 59.kJ/molCIDHanley, Whitten, et al., 1988gas phase; ΔrH<; M

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)

Quantity Value Units Method Reference Comment
IE (evaluated)8.29803 ± 0.00002eVN/AN/AL

Electron affinity determinations

EA (eV) Method Reference Comment
0.279743 ± 0.000044LPDScheer, Bilodeau, et al., 1998tunable IR laser; B
0.278 ± 0.010LPESFeigerle, Corderman, et al., 1981B
<0.500002PDFeldmann, Rackwitz, et al., 1977B

Ionization energy determinations

IE (eV) Method Reference Comment
8.29803EVALLide, 1992LL
8.298SKelly, 1987LBLHLM
8.0EIMurad and Hildenbrand, 1975LLK
8.29802 ± 0.00002SBrown, Tilford, et al., 1974LLK
8.6 ± 0.4EIGingerich, 1971LLK
8.298SMoore, 1970RDSH

References

Go To: Top, Gas 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

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