HGa
- Formula: GaH
- Molecular weight: 70.731
- CAS Registry Number: 13572-92-4
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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 July, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Open-structure absorption bands in the region 41650 - 46300 cm-1, provisionally ascribed to GaH. | ||||||||||||
| ↳Garton, 1951 | ||||||||||||
| A 1Π | [5.1] 1 2 | [1.82] | A ↔ x R | 23714 HQ | ||||||||
| ↳Neuhaus, 1957; Ginter and Innes, 1961; Kronekvist, Lagerqvist, et al., 1971 | ||||||||||||
| a 3Π2 | [6.811] | [0.000620] 3 | [1.5785] | a → X V | 17909.43 Z | |||||||
| ↳missing citation | ||||||||||||
| a 3Π1 | 17622.01 | 1631.17 Z | 58.22 | -7.47 | 6.692 4 | 0.326 5 | -0.0315 | 0.000489 6 | 1.5925 | a ↔ X VR | 17626.84 Z | |
| ↳Neuhaus, 1957; missing citation | ||||||||||||
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
| a 3Π0+ | 17337.08 | 1640.54 Z | 62.72 7 | -6.195 | 6.394 4 | 0.276 8 | -0.04 | 0.000262 9 | 1.6292 | a ↔ X RV | 17345.78 Z | |
| ↳Neuhaus, 1957; missing citation | ||||||||||||
| a 3Π0- | 17333 | [1492.5] Z | 10 | 6.358 | 0.220 11 | -0.058 | [0.000243] 12 | 1.6338 | a → X 13 RV | 17340.41 Z | ||
| ↳Poynor, Innes, et al., 1967 | ||||||||||||
| X 1Σ+ | 0 | 1604.52 Z | 28.77 | 0.36 | 6.137 4 | 0.181 14 | -0.0005 | 0.000342 15 | 1.6630 | |||
Notes
| 1 | From the value for GaD. |
| 2 | Deuteride bands involving this level have diffuse rotational lines whose width increases with J. Corresponding lines of the hydride are even broader, only diffuse Q and R heads can be recognized. The diffuseness results from tunnelling through a potential maximum which separates the shallow potential well from the dissociation limit 2P3/2 + 2S. |
| 3 | DRP - DQ= +12E-6. |
| 4 | RKR potential functions Ginter and Battino, 1965. |
| 5 | Rotational constants derived from R and P branches. Slightly different Bv and Dv values from the Q branches; see Ginter and Innes, 1961. |
| 6 | Dv= -124E-6(v+1/2) + 83.5E-6(v+1/2)2; see 5. |
| 7 | missing note |
| 8 | missing note |
| 9 | Dv= +75E-6(v+1/2) + 14.5E-6(v+1/2)2. |
| 10 | ΔG(3/2) = 1313.6. |
| 11 | missing note |
| 12 | D1 = 4l3E-6, D2 = 463E-6. |
| 13 | Each band consists of a single Q branch. |
| 14 | missing note |
| 15 | Dv= +1E-6(v+1/2)2. |
| 16 | From the predissociation of A 1Π(v=0), see 2. |
| 17 | Calculated from v0(0-1) = 22745.8 using ground state vibrational constants derived from GaH. The 0-0 band was not observed owing to a strong overlapping impurity. |
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.
Garton, 1951
Garton, W.R.S.,
Extension of line series in the arc spectrum of indium: ultra-violet absorption bands probably due to InH and GaH,
Proc. Phys. Soc. London Sect. A, 1951, 64, 509. [all data]
Neuhaus, 1957
Neuhaus, H.,
Band spectrum of gallium hydride and gallium deuteride,
Nature (London), 1957, 180, 433. [all data]
Ginter and Innes, 1961
Ginter, M.L.; Innes, K.K.,
Band spectrum of the GaH molecule,
J. Mol. Spectrosc., 1961, 7, 64. [all data]
Kronekvist, Lagerqvist, et al., 1971
Kronekvist, M.; Lagerqvist, A.; Neuhaus, H.,
The A1Π-X1Σ+ transition in the spectra of GaH and GaD,
J. Mol. Spectrosc., 1971, 39, 516. [all data]
Poynor, Innes, et al., 1967
Poynor, P.C.; Innes, K.K.; Ginter, M.L.,
The a3Π0- → X1Σ+ transition of the GaH molecule,
J. Mol. Spectrosc., 1967, 23, 237. [all data]
Ginter and Battino, 1965
Ginter, M.L.; Battino, R.,
On the calculation of potential curves by the Rydberg-Klein-Rees method. I. Experimental limitations, extrapolation procedures, and applications to the third-group hydrides,
J. Chem. Phys., 1965, 42, 3222. [all data]
Notes
Go To: Top, Constants of diatomic molecules, References
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