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
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Gas phase ion energetics data

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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

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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

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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

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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