Ruthenium monoxide

Formula: ORu
Molecular weight: 117.07
IUPAC Standard InChI: InChI=1S/O.Ru/q-2;+2
IUPAC Standard InChIKey: KZECJIQUDMPFJV-UHFFFAOYSA-N
CAS Registry Number: 12143-05-4
Chemical structure:
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Gas phase ion energetics data

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Data compiled as indicated in comments:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to ORu⁺ (ion structure unspecified)

Ionization energy determinations

IE (eV)	Method	Reference	Comment
8.7	EI	Norman, Staley, et al., 1968	RDSH

Constants of diatomic molecules

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

Data collected through May, 1975

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 ¹⁰²Ru¹⁶O
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
Additional unclassified emission bands in the region 15500 - 17200 cm^-1.
↳Scullman and Thelin, 1975
B₃	a₃ + 18121.4	792.9 H	4.1		0.3818	0.0025		4E-7		1.787₁	B₃ → A₃ 1 R	18086.2 Z
B₃	↳Raziunas, Macur, et al., 1965; missing citation
B₂ (Ω=3)	a₂ + 18101	[783] H			[0.382] 2			[6E-7] 2		[1.78₇]	B₂ → A₂ 1 R	18065.1 Z
B₂ (Ω=3)	↳Raziunas, Macur, et al., 1965; missing citation
B₁					[(0.384)]					[(1.78)]	B₁ → A₁ 1 R	18024 Z
B₁	↳Raziunas, Macur, et al., 1965; Scullman and Thelin, 1975
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
A₃	a₃ 3	863.5 H	4.6		0.4137	0.0028		3E-7		1.716₈
A₂ (Ω=3)	a₂ 3	[855] H			[0.4144] 4			[3.9E-7]		[1.715₄]
A₁	a₁ 3				[(0.414)]					[(1.72)]

Notes

R and P branches only.

B₁ = 0.381, D₁= 9E-7. Perturbations.

Relative position of these three states unknown.

B₁ = 0.413.

Thermochemical value (mass-spectrometry) Norman, Staley, et al., 1968.

References

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Norman, Staley, et al., 1968
Norman, J.H.; Staley, H.G.; Bell, W.E., Mass spectrometric study of the noble metal oxides. Ruthenium-oxygen system, Advan. Chem. Ser., 1968, 72, 101. [all data]

Scullman and Thelin, 1975
Scullman, R.; Thelin, B., The emission spectrum of RuO between 5000 and 6800 Å, J. Mol. Spectrosc., 1975, 56, 64. [all data]

Raziunas, Macur, et al., 1965
Raziunas, V.; Macur, G.; Katz, S., Emission spectrum and thermodynamic properties of ruthenium monoxide, J. Chem. Phys., 1965, 43, 1010. [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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