Difluoroborane


Gas phase thermochemistry data

Go To: Top, Reaction thermochemistry 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-175.40kcal/molReviewChase, 1998Data last reviewed in December, 1965
Quantity Value Units Method Reference Comment
gas,1 bar58.325cal/mol*KReviewChase, 1998Data last reviewed in December, 1965

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 1200.1200. to 6000.
A 2.50173118.64840
B 30.206410.644460
C -21.91540-0.124815
D 5.9770800.008361
E 0.035680-2.497730
F -177.1880-186.8480
G 53.4668072.86611
H -175.4000-175.4000
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1965 Data last reviewed in December, 1965

Reaction thermochemistry 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 by: 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

BF2- + Hydrogen cation = Difluoroborane

By formula: BF2- + H+ = HBF2

Quantity Value Units Method Reference Comment
Δr373.9 ± 6.1kcal/molD-EASrivastava, Uy, et al., 1974gas phase; EA: 29.2 kcal < EA(F), new EA(F) used. Too stable by ca. 24 kcal/mol, relative to G3(MP2)B3 calcs.
Quantity Value Units Method Reference Comment
Δr366.4 ± 6.2kcal/molH-TSSrivastava, Uy, et al., 1974gas phase; EA: 29.2 kcal < EA(F), new EA(F) used. Too stable by ca. 24 kcal/mol, relative to G3(MP2)B3 calcs.

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry 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]


Notes

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