Difluoroboryl radical


Gas phase thermochemistry data

Go To: Top, Gas phase ion energetics data, References, Notes

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
Δfgas-141.00kcal/molReviewChase, 1998Data last reviewed in June, 1972
Quantity Value Units Method Reference Comment
gas,1 bar59.073cal/mol*KReviewChase, 1998Data last reviewed in June, 1972

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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

View table.

Temperature (K) 298. to 800.800. to 6000.
A 3.76926014.02540
B 24.77880-0.217175
C -24.316210.079113
D 8.856131-0.004856
E 0.041123-0.829874
F -142.8900-147.4430
G 57.4793072.78781
H -141.0000-141.0000
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1972 Data last reviewed in June, 1972

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, References, Notes

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:
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
B - John E. Bartmess

View reactions leading to BF2+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
2.13 ± 0.13IMRESrivastava, Uy, et al., 1974EA: 29.2 kcal < EA(F), new EA(F) used. Too stable by ca. 24 kcal/mol, relative to G3(MP2)B3 calcs.; B

Ionization energy determinations

IE (eV) Method Reference Comment
9.4DERLias, Bartmess, et al., 1988LL
9.0 ± 1.0EIFarber and Srivastava, 1984LBLHLM
9. ± 1.EIUy, Srivastava, et al., 1971LLK
8. ± 1.EISrivastava and Farber, 1971LLK

References

Go To: Top, Gas phase 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.

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

Srivastava, Uy, et al., 1974
Srivastava, R.D.; Uy, O.M.; Farber, M., Experimental determination of heats of formation of negative ions and electron affinities of several boron and aluminum fluorides, J. Chem. Soc. Faraday Trans. 1, 1974, 70, 1033. [all data]

Lias, Bartmess, et al., 1988
Lias, S.G.; Bartmess, J.E.; Liebman, J.F.; Holmes, J.L.; Levin, R.D.; Mallard, W.G., Gas-phase ion and neutral thermochemistry, J. Phys. Chem. Ref. Data, Suppl. 1, 1988, 17, 1-861. [all data]

Farber and Srivastava, 1984
Farber, M.; Srivastava, R.D., Electron and thermal dissociation of BF3(g), J. Chem. Phys., 1984, 81, 241. [all data]

Uy, Srivastava, et al., 1971
Uy, O.M.; Srivastava, R.D.; Farber, M., Mass spectrometric determination of the heats of formation of gaseous BO2 BOF2, High Temp. Sci., 1971, 3, 462. [all data]

Srivastava and Farber, 1971
Srivastava, R.D.; Farber, M., Thermodynamic properties of the B-Cl-F system from mass spectrometer investigations, J. Chem. Soc. Faraday Trans., 1971, 67, 2298. [all data]


Notes

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