Arsenic monohydride
- Formula: AsH
- Molecular weight: 75.92954
- IUPAC Standard InChI: InChI=1S/AsH/h1H
- IUPAC Standard InChIKey: UIESIEAPEWREMY-UHFFFAOYSA-N
- CAS Registry Number: 12628-08-9
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Data at other public NIST sites:
- Options:
Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, 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 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
(CAS Reg. No. 13937-35-4 • 4294967295) +
= CAS Reg. No. 13937-35-4
By formula: (CAS Reg. No. 13937-35-4 • 4294967295HAs) + HAs = CAS Reg. No. 13937-35-4
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 363. ± 10. | kJ/mol | N/A | Gal, Maria, et al., 1989 | gas phase |
As- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1508.1 ± 2.9 | kJ/mol | D-EA | Walter, Gibson, et al., 2009 | gas phase |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, 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 compiled as indicated in comments:
B - John E. Bartmess
LL - Sharon G. Lias and Joel F. Liebman
View reactions leading to HAs+ (ion structure unspecified)
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 1.00 ± 0.10 | PD | Rackwitz, Feldman, et al., 1977 | B |
| <1.09997 | IMRB | Ebinghaus, Kraus, et al., 1964 | From AsH3; B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.641 ± 0.008 | PI | Berkowitz, 1988 | LL |
De-protonation reactions
As- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1508.1 ± 2.9 | kJ/mol | D-EA | Walter, Gibson, et al., 2009 | gas phase; B |
Constants of diatomic molecules
Go To: Top, Reaction thermochemistry data, 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 February, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A 3Πi 0 | 1 | [1207.5] 2 Z | [6.5623] 3 4 | 0.886 2 | [0.000703] | [1.6203] 5 | A ← X R | 30518.34 Z | ||||
| ↳Dixon and Lamberton, 1968; Veseth, 1972 | ||||||||||||
| A 3Πi 1 | [6.4726] 6 4 | [0.000624] | A ← X R | 29821.97 Z | ||||||||
| ↳Dixon and Lamberton, 1968; Veseth, 1972 | ||||||||||||
| A 3Πi 2 | [6.3387] 4 | [0.000554] | A ← X R | 29282.16 Z | ||||||||
| ↳Dixon and Lamberton, 1968; Veseth, 1972 | ||||||||||||
| X 3Σ- | 0 7 | (2130) | [7.1998] 7 | [0.000329] | [1.5344] | |||||||
Notes
| 1 | A0 = -615.4. Small J-dependence Veseth, 1972. |
| 2 | ΔG(1/2) and α for the 3Π0+ component only. |
| 3 | Λ-type doubling,Δνef(v=0) = +44.72 + 0.0056J(J+1). |
| 4 | Lines are sharp for the 3Π0+ state only. Line width increases in the order 3Π0+ < 3Π0- < 3Π1 < 3Π2, and also with increasing vibrational energy. The predissociation is due to interaction with the unstable 5Σ- state arising from As(4S) + H(2S) Dixon and Lamberton, 1968. |
| 5 | From the "true" B0 values in Veseth, 1972. |
| 6 | Λ-type doubling,Δνef(v=0) = +0.0214J(J+1). |
| 7 | Spin splitting constants λ0 = +58.87, γ0 = -0.281. |
| 8 | From the predissociation in A 3Π. |
| 9 | From a short extrapolation Dixon and Lamberton, 1968 of the 3Π state to the limit As(2D) + H(2S). |
| 10 | A0 = -616.9, small J-dependence Veseth, 1972; A1 = -599.8. |
| 11 | Λ-type doubling, Δνef(v=0) = +43.39 + 0.00472J(J+1). |
| 12 | Λ-type doubling, Δνef(v=0) = +0.0046J(J+1). |
| 13 | Spin splitting constants λ0 = +58.811, γ0 = -0.l475. |
| 14 | H0 = +5E-9. |
References
Go To: Top, Reaction thermochemistry data, 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.
Gal, Maria, et al., 1989
Gal, J.-F.; Maria, P.-C.; Decouzon, M.,
The Gas-Phase Acidity and Bond Dissociation Energies of Hydrogen Telluride,
Int. J. Mass Spectrom. Ion Proc., 1989, 93, 1, 87, https://doi.org/10.1016/0168-1176(89)83076-9
. [all data]
Walter, Gibson, et al., 2009
Walter, C.W.; Gibson, N.D.; Field, R.L.; Snedden, A.P.; Shapiro, J.Z.; Janczak, C.M.; Hanstorp, D.,
Electron affinity of arsenic and the fine structure of As- measured using infrared photodetachment threshold spectroscopy,
Phys. Rev. A, 2009, 80, 1, 014501, https://doi.org/10.1103/PhysRevA.80.014501
. [all data]
Rackwitz, Feldman, et al., 1977
Rackwitz, R.; Feldman, D.; Kaiser, H.J.; Heincke, E.,
Photodetachment bei einigen zweiatomigen negativen hydridionen: BeH-, MgH-, CaH-, ZnH-, PH-, AsH-,
Z. Naturforsch. A:, 1977, 32, 594. [all data]
Ebinghaus, Kraus, et al., 1964
Ebinghaus, H.; Kraus, K.; Neuert, H.; Muller-Duysing, W.,
Negative Ionen durch Elecktronenresonanzeinfang in PH3, AsH3, und SiH4,
Z. Naturfor., 1964, 19A, 732. [all data]
Berkowitz, 1988
Berkowitz, J.,
Photoionization mass spectrometric studies of AsHn(n=1-3),
J. Chem. Phys., 1988, 89, 7065. [all data]
Dixon and Lamberton, 1968
Dixon, R.N.; Lamberton, H.M.,
The A, 3Πi-X, 3Σ- band systems of AsH and AsD,
J. Mol. Spectrosc., 1968, 25, 12. [all data]
Veseth, 1972
Veseth, I.,
Fine structure of 3Π and 3Σ- states in diatomic molecules,
J. Phys. B:, 1972, 5, 229. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, References
- Symbols used in this document:
EA Electron affinity ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.