CCCBDB listing of experimental data page 2

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Property	Value	Uncertainty	units	Reference	Comment
Hfg(298.15K)	107.05	0.25	kJ mol^-1	Gurvich	Hfg from 1996Dix:6905
Hfg(0K)	110.02	0.25	kJ mol^-1	Gurvich	Hfg from 1996Dix:6905
Entropy (298.15K)	220.91		J K^-1 mol^-1	Gurvich
Integrated Heat Capacity (0 to 298.15K)	9.94		kJ mol^-1	Gurvich
Heat Capacity (298.15K)	33.88		J K^-1 mol^-1	Gurvich

Mode Number	Symmetry	Frequency			Intensity			Comment	Description
Mode Number	Symmetry	Fundamental(cm^-1)	Harmonic(cm^-1)	Reference	(km mol^-1)	unc.	Reference	Comment	Description
1	A'	2684		VEEL5
2	A'	1565		VEEL5
3	A'	1501		1979HUB/HER

Description	Value	unc.	Connectivity				Reference	Comment
Description	Value	unc.	Atom 1	Atom 2	Atom 3	Atom 4	Reference	Comment
rNH	1.090		1	2			1976OGI:407
rNO	1.209		2	3			1976OGI:407
aHNO	108.047		1	2	3		1976OGI:407

Atom	y (Å)	z (Å)
H1	-0.9718	0.9211
N2	0.0648	0.5834
O3	0.0648	-0.6256

	H1	N2	O3
H1		1.0903	1.8620
N2	1.0903		1.2090
O3	1.8620	1.2090

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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State	Config	State description	Conf description	Exp. min.	Dipole (Debye)				Reference	comment	Point Group	Components
State	Config	State description	Conf description	Exp. min.	x	y	z	total	Reference	comment	Point Group	dipole	quadrupole
1	1	¹A^'	C_s	True	1.310	1.030		1.670	NISTtriatomic	x=b, y=a MW μ₀	C_s	2	3

squib	reference	DOI
1966Herzberg	Herzberg, G., Electronic spectra and electronic structure of polyatomic molecules,Van Nostrand,New York, 1966
1976OGI:407	Structures of triatomic radicals HCO, HNO and HOO, J. Mol. Struct. 31, 407-410, 1976	10.1016/0022-2860(76)80021-X
1979HUB/HER	Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules, Van Nostrand Reinhold Co., 1979	10.1007/978-1-4757-0961-2
Gurvich	Gurvich, L.V.; Veyts, I. V.; Alcock, C. B., Thermodynamic Properties of Individual Substances, Fouth Edition, Hemisphere Pub. Co., New York, 1989
NISTtriatomic	NIST Triatomic Spectral Database (http://www.physics.nist.gov/PhysRefData/MolSpec/Triatomic/index.html)	10.18434/T4DW2S
VEEL5	M.E. Jacox, Vibrational and Electronic Energy Levels of Polyatomic Transient Molecules, J. Phys. Chem.Ref. Data, Monograph 3 (1994) (updated data in NIST Chemistry Webbook - http://webbook.nist.gov/chemistry/
webbook	NIST Chemistry Webbook (http://webbook.nist.gov/chemistry)	10.18434/T4D303

Bond Type	Count
H-N	1
N=O	1

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Experimental data for HNO+ (Nitrosyl hydride cation)

Experimental data for HNO⁺ (Nitrosyl hydride cation)