Gallium monoiodide

Formula: GaI
Molecular weight: 196.627
CAS Registry Number: 15605-68-2
Information on this page:
Data at other public NIST sites:
- Microwave spectra (on physics lab web site)
- Gas Phase Kinetics Database
Options:
- Switch to calorie-based units

Gas phase ion energetics data

Go To: Top, Constants of diatomic molecules, References, Notes

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

IE (eV)	Method	Reference	Comment
9.03	PE	Grabandt, Mooyman, et al., 1990	LL
9.0 ± 0.3	EI	Kleinschmidt and Hildenbrand, 1978	LLK
9.19	PE	Grabandt, Mooyman, et al., 1990	Vertical value; LL

Constants of diatomic molecules

Go To: Top, Gas phase ion energetics data, References, Notes

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through September, 1976

Symbols used in the table of constants
Symbol	Meaning
State	electronic state and / or symmetry symbol
T_e	minimum electronic energy (cm^-1)
ω_e	vibrational constant – first term (cm^-1)
ω_ex_e	vibrational constant – second term (cm^-1)
ω_ey_e	vibrational constant – third term (cm^-1)
B_e	rotational constant in equilibrium position (cm^-1)
α_e	rotational constant – first term (cm^-1)
γ_e	rotation-vibration interaction constant (cm^-1)
D_e	centrifugal distortion constant (cm^-1)
β_e	rotational constant – first term, centrifugal force (cm^-1)
r_e	internuclear distance (Å)
Trans.	observed transition(s) corresponding to electronic state
ν₀₀	position of 0-0 band (units noted in table)

Diatomic constants for ⁶⁹Ga¹²⁷I
State	T_e	ω_e	ω_ex_e	B_e	α_e	D_e	r_e	Trans.	ν₀₀
C ¹Π 1								C ← X
C ¹Π 1	↳Miescher and Wehrli, 1933
B ³Π₁	25900.6	185.0 H^Q	2.7					B ↔ X 2	25884.3 H^Q
B ³Π₁	↳missing citation
A ³Π₀₊	25571.0	193.2 H	2.4					A ↔ X 2	25559.0 H
A ³Π₀₊	↳missing citation
X ¹Σ⁺	0	216.6 H^Q	0.5	0.056934₇	0.000189	1.57E-8	2.57467 3
X ¹Σ⁺	↳Barrett and Mandel, 1958

Notes

Continuous absorption with maximum at 32600 cm^-1.

Both directions of shading occur, even in one and the same band.

Microwave sp. 5

Extrapolation of vibrational intervals in A and B; see the discussion in Barrow, 1960.

eqQ(⁶⁹Ga)= -66 MHz; eqQ(¹²⁷I)= -549 MHz.

References

Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, Notes

Grabandt, Mooyman, et al., 1990
Grabandt, O.; Mooyman, R.; De Lange, C.A., He(I) photoelectron spectroscopy of the gallium monohalides, Chem. Phys., 1990, 143, 227. [all data]

Kleinschmidt and Hildenbrand, 1978
Kleinschmidt, P.D.; Hildenbrand, D.L., Dissociation energies of CaI, SrI, and BaI from high temperature mass spectrometry, J. Chem. Phys., 1978, 68, 2819. [all data]

Miescher and Wehrli, 1933
Miescher, E.; Wehrli, M., Die spektren der galliumhalogenide, Helv. Phys. Acta, 1933, 6, 458. [all data]

Barrett and Mandel, 1958
Barrett, A.H.; Mandel, M., Microwave spectra of the Tl, In, and Ga monohalides, Phys. Rev., 1958, 109, 1572. [all data]

Barrow, 1960
Barrow, R.F., Dissociation energies of the gaseous monohalides of boron, aluminium, gallium, indium, and thallium, Trans. Faraday Soc., 1960, 56, 952. [all data]

Notes

Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, References

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.