Borane(1)
- Formula: BH
- Molecular weight: 11.819
- IUPAC Standard InChIKey: UWBOAQKPEXKXSU-UHFFFAOYSA-N
- CAS Registry Number: 13766-26-2
- Chemical structure:
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Gas phase ion energetics data
Go To: Top, Constants of diatomic molecules, References, Notes
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:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to HB+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 9.77 ± 0.05 | eV | N/A | N/A | L |
Electron affinity determinations
EA (eV) | Reference | Comment |
---|---|---|
0.30 ± 0.25 | Reid, 1993 | B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.77 | EVAL | Huber and Herzberg, 1979 | LLK |
9.8 ± 0.5 | EI | Steck, Pressley, et al., 1969 | RDSH |
9.77 ± 0.05 | S | Bauer, Herzberg, et al., 1964 | RDSH |
De-protonation reactions
B- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1622. ± 8.8 | kJ/mol | D-EA | Scheer, Bilodeau, et al., 1998 | gas phase; tunable IR laser; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1594. ± 9.2 | kJ/mol | H-TS | Scheer, Bilodeau, et al., 1998 | gas phase; tunable IR laser; B |
Constants of diatomic molecules
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.
Data compiled by: Klaus P. Huber and Gerhard H. Herzberg
Data collected through April, 1976
Symbol | Meaning |
---|---|
State | electronic state and / or symmetry symbol |
Te | minimum electronic energy (cm-1) |
ωe | vibrational constant – first term (cm-1) |
ωexe | vibrational constant – second term (cm-1) |
ωeye | vibrational constant – third term (cm-1) |
Be | rotational constant in equilibrium position (cm-1) |
αe | rotational constant – first term (cm-1) |
γe | rotation-vibration interaction constant (cm-1) |
De | centrifugal distortion constant (cm-1) |
βe | rotational constant – first term, centrifugal force (cm-1) |
re | internuclear distance (Å) |
Trans. | observed transition(s) corresponding to electronic state |
ν00 | position of 0-0 band (units noted in table) |
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
(5d) 1 | 5d ← X | |||||||||||
↳Bauer, Herzberg, et al., 1964 | ||||||||||||
K 1Π (4d) 2 | K ← X | 71840 | ||||||||||
↳Bauer, Herzberg, et al., 1964 | ||||||||||||
J 1Σ+ 4p 2 | J ← X 3 | 70040 | ||||||||||
↳Bauer, Herzberg, et al., 1964 | ||||||||||||
I 1Σ+ 4s | [11.99] 4 | [1.234] | I ← X 3 | 67395.8 Z | ||||||||
↳Bauer, Herzberg, et al., 1964; Johns and Lepard, 1975 | ||||||||||||
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
H 1Δ 3d | [12.255] 4 | [1.2206] | H ← A | 43345.7 Z | ||||||||
↳missing citation; Johns and Lepard, 1975 | ||||||||||||
[12.255] 4 | [1.2206] | H ← X | 66419.7 Z | |||||||||
↳missing citation; Johns and Lepard, 1975 | ||||||||||||
G 1Π 3d | [12.255] 4 | [1.2206] | G ← X | 66399.3 Z | ||||||||
↳missing citation; Johns and Lepard, 1975 | ||||||||||||
F 1Σ+ 3d | [12.255] 4 | [1.2206] | F ← X | 66079.5 Z | ||||||||
↳missing citation; Johns and Lepard, 1975 | ||||||||||||
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
E 1Σ+ 3p | [12.321] | [0.0013] | [1.2173] | E ← X | 61872.3 Z | |||||||
↳missing citation | ||||||||||||
D 1Π 3p | [12.321] | [0.0013] | [1.2173] | D ← X | 61105.4 Z | |||||||
↳missing citation | ||||||||||||
C 1Σ+ | 55281.1 | 2474.72 Z | 54.424 5 | 0.228 | 12.410 6 | 0.432 | [0.001247] 7 | 1.2129 | C → A V | 32259.78 Z | ||
↳Douglas, 1941; Johns, Grimm, et al., 1967 | ||||||||||||
C ← X 3 | 55333.69 Z | |||||||||||
↳Bauer, Herzberg, et al., 1964 | ||||||||||||
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
B 1Σ+ 3s | 52335.8 | 2.3399.91 Z | 69.519 8 | -3.927 | 12.399 9 | 0.485 10 | -0.424 | 0.00126 11 | 0.0001 | 1.2164 | B → A V | 29272.73 Z |
↳Douglas, 1941 | ||||||||||||
B ← X 3 | 52346.69 Z | |||||||||||
↳missing citation; Johns, Grimm, et al., 1967 | ||||||||||||
c 3Σ+ | 12 | |||||||||||
C' 1Δ | 45981.0 | 2610.02 Z | 46.62 | 12.757 | 0.390 | 0.001219 13 | -0.00002 | 1.1963 | C' ↔ A V | 23029.21 Z | ||
↳missing citation | ||||||||||||
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
b 3Σ(-) | [12.126] | [0.00128] | [1.2271] | b → a R | 27060.8 Z | |||||||
↳Lochte-Holtgreven and van der Vleugel, 1931; Almy and Horsfall, 1937 | ||||||||||||
A 1Π | 23135.8 | 2250.99 Z | 56.665 14 | -15.83 | 12.2952 15 16 17 | 0.8346 18 | [0.001451] 7 | 1.2186 | A 19 ↔ X RV | 23073.96 Z | ||
↳missing citation; Almy and Horsfall, 1937; Thrush, 1960; missing citation | ||||||||||||
a 3Π | 20 | [12.667] 21 | [0.00122] | [1.2006] | ||||||||
X 1Σ+ | 0 | 2366.90 Z | 49.395 22 | 0.364 | 12.021 23 | 0.412 | 0.001242 24 | -0.000026 | 1.2324 25 |
Notes
1 | Fragments in the region 74420 - 74523 cm-1. |
2 | Fragments only. |
3 | Nearly undegraded, headless band. |
4 | The rotational constants for the 4s state and the 3d complex were re-determined by Johns and Lepard Johns and Lepard, 1975 using a model which gives proper consideration to the effects of s~d mixing. Ginter Ginter, 1966 obtained effective constants for the four states involved. |
5 | missing note |
6 | Predissociation in v=2 for J>8. v=3 perturbed at low J. |
7 | Additional Dv and higher order constants in Johns, Grimm, et al., 1967. |
8 | missing note |
9 | Theoretical calculations Browne and Greenawalt, 1970, Pearson, Bender, et al., 1971 predict a double minimum potential curve. |
10 | missing note |
11 | H0 = +0.56E-9. |
12 | The lowest 3Σ+ state, Te ~51700 Grimaldi, Lecourt, et al., 1966, Pearson, Bender, et al., 1971, is predicted Pearson, Bender, et al., 1971 to be Rydberg-like (3sσ) and quasi-bound at small internuclear distances, but valence-like and repulsive (dissociating into ground state atoms) for separations larger than 1.45 Å. |
13 | He ~1.00E-7 |
14 | This state has a potential hump Herzberg and Mundie, 1940, Johns, Grimm, et al., 1967 of approximately 0.155 eV Hurley, 1961, Blint and Goddard, 1974. |
15 | Λ-type doubling, Δvef = +[0.0389-0.027(v+1/2)]J(J+1). |
16 | Predissociation by rotation. J' of the first missing or first diffuse lines: v'=0, em./abs = 27/30; v'=1, em./abs = 21/24; v'=2, em./abs = 14/17; v'=3, em./abs = -/6. |
17 | μel(v=0) = 0.58 D Thomson and Dalby, 1969. |
18 | αv= +0.1322(v+1/2)2 - 0.05188(v+1/2)3 |
19 | Radiative lifetime τ = 159 ns; f00 = 0.035 Smith, 1971. |
20 | A0 = +5.95. Theoretical estimates of Te range from 2800 to 9700 cm-1; see the summary in Harrison and Allen, 1969, also Blint and Goddard, 1974. |
21 | Λ-type doubling; see Almy and Horsfall, 1937. |
22 | missing note |
23 | μel(v=0)= 1.27 D Thomson and Dalby, 1969. Theory Stevens and Lipscomb, 1965 predicts a large negative rotational magnetic moment of -8.27 μN. |
24 | Higher order constants in Johns, Grimm, et al., 1967. |
25 | Summary of theoretical calculations see ref. in Cade and Huo, 1967, Harrison and Allen, 1969, Banyard and Taylor, 1975, Meyer and Rosmus, 1975. |
26 | From the predissociation by rotation in A 1Π Johns, Grimm, et al., 1967; see 16. The estimated height (see 14) of the potential hump in A 1Π was subtracted from the extrapolated energy of the potential maximum. Good agreement with theory [ Ellison, 1965, additional results summarized in Meyer and Rosmus, 1975]. |
27 | From the observation of Rydberg states in the absorption spectrum Bauer, Herzberg, et al., 1964; theoretical computations Griffing and Simons, 1975 give 9.53 eV. |
References
Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Reid, 1993
Reid, C.J.,
Electron Affinities of BH, B2, BC, and BN molecules determined using Charge Inversion Spectrometry,
Int. J. Mass Spectrom. Ion Proc., 1993, 127, 147, https://doi.org/10.1016/0168-1176(93)87087-9
. [all data]
Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G.,
Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules,, Van Nostrand Reinhold Co., 1979, ,1. [all data]
Steck, Pressley, et al., 1969
Steck, S.J.; Pressley, G.A., Jr.; Stafford, F.E.,
Mass spectrometric investigation of the high-temperature reaction of hydrogen with boron carbide,
J. Phys. Chem., 1969, 73, 1000. [all data]
Bauer, Herzberg, et al., 1964
Bauer, S.H.; Herzberg, G.; Johns, J.W.C.,
The absorption spectrum of BH and BD in the vacuum ultraviolet,
J. Mol. Spectry., 1964, 13, 256. [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]
Johns and Lepard, 1975
Johns, J.W.C.; Lepard, D.W.,
Calculation of rotation-electronic energies and relative transition intensities in diatomic molecules,
J. Mol. Spectrosc., 1975, 55, 374. [all data]
Douglas, 1941
Douglas, A.E.,
New electronic transitions of the BH molecule,
Can. J. Res. Sect. A, 1941, 19, 27. [all data]
Johns, Grimm, et al., 1967
Johns, J.W.C.; Grimm, F.A.; Porter, R.F.,
On the spectrum of BH in the near ultraviolet,
J. Mol. Spectrosc., 1967, 22, 435. [all data]
Lochte-Holtgreven and van der Vleugel, 1931
Lochte-Holtgreven, W.; van der Vleugel, E.S.,
Uber ein bandenspektrum des borhydrides,
Z. Phys., 1931, 70, 188. [all data]
Almy and Horsfall, 1937
Almy, G.M.; Horsfall, R.B., Jr.,
The spectra of neutral and ionized boron hydride,
Phys. Rev., 1937, 51, 491. [all data]
Thrush, 1960
Thrush, B.A.,
Absorption spectra of diatomic radicals containing boron or silicon,
Nature (London), 1960, 186, 1044. [all data]
Ginter, 1966
Ginter, M.L.,
Molecular constants for 1-uncoupled electronic states of diatomic molecules,
J. Chem. Phys., 1966, 44, 950. [all data]
Browne and Greenawalt, 1970
Browne, J.C.; Greenawalt, E.M.,
A new double minimum problem: the B1Σ+ state of BH,
Chem. Phys. Lett., 1970, 7, 363. [all data]
Pearson, Bender, et al., 1971
Pearson, P.K.; Bender, C.F.; Schaefer, H.F., III,
Theoretical description of molecular Rydberg states: B1Σ+ and lowest 3Σ+ states of BH,
J. Chem. Phys., 1971, 55, 5235. [all data]
Grimaldi, Lecourt, et al., 1966
Grimaldi, F.; Lecourt, A.; Lefebvre-Brion, H.; Moser, C.M.,
Calculation of Rydberg levels of BH and AlH,
J. Mol. Spectrosc., 1966, 20, 341. [all data]
Herzberg and Mundie, 1940
Herzberg, G.; Mundie, L.G.,
On the predissociation of several diatomic molecules,
J. Chem. Phys., 1940, 8, 263. [all data]
Hurley, 1961
Hurley, A.C.,
Electronic structure of the first row hydrides. III. Predissociation by rotation in the A1Π state and the dissociation energy of BH,
Proc. R. Soc. London A, 1961, 261, 237. [all data]
Blint and Goddard, 1974
Blint, R.J.; Goddard, W.A., III,
The orbital description of the potential energy curves and properties of the lower excited states of the BH molecule,
Chem. Phys., 1974, 3, 297. [all data]
Thomson and Dalby, 1969
Thomson, R.; Dalby, F.W.,
An experimental determination of the dipole moments of the X(1Σ) and A(1Π) states of the BH molecule,
Can. J. Phys., 1969, 47, 1155. [all data]
Smith, 1971
Smith, W.H.,
Absolute oscillator strengths for the CH+, CD+, and BH A1Π-X1Σ+ transition,
J. Chem. Phys., 1971, 54, 1384. [all data]
Harrison and Allen, 1969
Harrison, J.F.; Allen, L.C.,
The electronic structure and molecular properties of boron hydride in its ground and excited states,
J. Mol. Spectrosc., 1969, 29, 432. [all data]
Stevens and Lipscomb, 1965
Stevens, R.M.; Lipscomb, W.N.,
Perturbed Hartree-Fock calculations. V. Magnetic properties of the BH molecule,
J. Chem. Phys., 1965, 42, 3666. [all data]
Cade and Huo, 1967
Cade, P.E.; Huo, W.M.,
Electronic structure of diatomic molecules. VI.A. Hartree-Fock wavefunctions and energy quantities for the ground states of the first-row hydrides, AH,
J. Chem. Phys., 1967, 47, 614. [all data]
Banyard and Taylor, 1975
Banyard, K.E.; Taylor, G.K.,
Potential energy curves and spectroscopic constants for BeH+, BH and CH+,
J. Phys. B:, 1975, 8, 137. [all data]
Meyer and Rosmus, 1975
Meyer, W.; Rosmus, P.,
PNO-Cl and CEPA studies of electron correlation effects. III. Spectroscopic constants and dipole moment functions for the ground states of the first-row and second-row diatomic hydrides,
J. Chem. Phys., 1975, 63, 2356. [all data]
Ellison, 1965
Ellison, F.O.,
Modified atoms-in-molecules model for predicting diatomic ground- and excited-state potential-energy curves. I. LiH, BeH, and BH,
J. Chem. Phys., 1965, 43, 3654. [all data]
Griffing and Simons, 1975
Griffing, K.M.; Simons, J.,
Theoretical studies of molecular ions. The ionization potential and electron affinity of BH,
J. Chem. Phys., 1975, 62, 535. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, References
- Symbols used in this document:
EA Electron affinity IE (evaluated) Recommended ionization energy ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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