Argon hydride
- Formula: ArH
- Molecular weight: 40.956
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Constants of diatomic molecules
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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 by: Klaus P. Huber and Gerhard H. Herzberg
Data collected through January, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B 2Π | 1 | [10.129] 2 | [0.000503] | [1.3012] | B → A 3 R | 13024.5 Z | ||||||
| ↳missing citation | ||||||||||||
| A 2Σ+ | [10.200] 4 | [0.000531] | [1.2966] | |||||||||
| For a theoretical calculation of the ground state potential (De = 0.0042 eV, re = 3.57 Å) and a comparison with experimental scattering data see Wagner, Das, et al., 1974. | ||||||||||||
Notes
| 1 | A0 =(-)2.0; see Johns, 1970. |
| 2 | Λ-type doubling; see Johns, 1970. Small perturbations are evident in the hydride spectrum. |
| 3 | 0-0 band only; diffuse lines. |
| 4 | v=0 of ArH, and v > 0 of ArD, are predissociated, probably by interaction with the unstable X 2Σ+ ground state; see Johns, 1970. |
| 5 | From Q branches; He = +l.34E-9. |
| 6 | 0-0 sequence only. Lines are sharp in the 0-0 band, but become more diffuse as v increases. |
| 7 | Spin splitting Δν12 = (+)[0.0369(N+1/2) - ...]. |
| 8 | D1 = 1.426E-4; H0 = +0.96E-9. |
References
Go To: Top, 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.
Wagner, Das, et al., 1974
Wagner, A.F.; Das, G.; Wahl, A.C.,
Calculated long-range interactions and low energy scattering of Ar-H,
J. Chem. Phys., 1974, 60, 1885. [all data]
Johns, 1970
Johns, J.W.C.,
A spectrum of neutral argon hydride,
J. Mol. Spectrosc., 1970, 36, 488. [all data]
Notes
Go To: Top, Constants of diatomic molecules, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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