CCCBDB listing of experimental data page 2

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Property	Value	Uncertainty	units	Reference
Hfg(298.15K)	294.00	4.00	kJ mol^-1	Gurvich
Hfg(0K)	300.30	4.00	kJ mol^-1	Gurvich
Entropy (298.15K)	239.33		J K^-1 mol^-1	Gurvich
Integrated Heat Capacity (0 to 298.15K)	10.95		kJ mol^-1	Gurvich
Heat Capacity (298.15K)	44.22		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'	3340		Gurvich					NH stretch
2	A'	2140							N#N str
3	A'	1264							NH bend
4	A'	1151							NN stretch
5	A'	534							NNN bend
6	A"	607							NNN bend

Description	Value	unc.	Connectivity				Reference	Comment
Description	Value	unc.	Atom 1	Atom 2	Atom 3	Atom 4	Reference	Comment
rNH	0.975	0.020	1	4			1976Hellwege(II/7)
rNN	1.237	0.003	2				1976Hellwege(II/7)
rNN	1.133	0.003	2	3			1976Hellwege(II/7)
aHNN	114.1	1	2	1	4		1976Hellwege(II/7)

Atom	x (Å)	y (Å)
N1	-1.1636	-0.0605
N2	0.0730	-0.0184
N3	1.2052	0.0203
H4	-1.5922	0.8151

	N1	N2	N3	H4
N1		1.2373	2.3702	0.9749
N2	1.2373		1.1329	1.8622
N3	2.3702	1.1329		2.9081
H4	0.9749	1.8622	2.9081

	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	0.837	1.480		1.700	1975Ben/Win:141	MW +-0.05 μ₀	C_s	2	3

squib	reference	DOI
1975Ben/Win:141	J Bendtsen, M Winnewisser "Ground State Spectroscopic Constants and Dipole Moment of Hydrazoic Acid, H14N3" Chem. Phys. Lett. 33(1) 141, 1975	10.1016/0009-2614(75)85471-6
1976Hellwege(II/7)	Hellwege, KH and AM Hellwege (ed.). Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 7: Structure Data of Free Polyatomic Molecules. Springer-Verlag. Berlin. 1976.
2009Qui/Wod:3822-3829	A Quinto-Hernandez, M Wodtke, Y-Y Lee, T-P Huang, W-C Pan, J J-M Lin "Ion Dissociation of Hydrazoic Acid Investigated by Synchrotron-Radiation-Based Photoionization Mass Spectrometry" J. Phys. Chem. A 2009, 113, 3822–3829	10.1021/jp809577t
Gurvich	Gurvich, L.V.; Veyts, I. V.; Alcock, C. B., Thermodynamic Properties of Individual Substances, Fouth Edition, Hemisphere Pub. Co., New York, 1989
webbook	NIST Chemistry Webbook (http://webbook.nist.gov/chemistry)	10.18434/T4D303

Bond Type	Count
N=N	2
H-N	1

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Experimental data for HN3 (hydrogen azide)

Experimental data for HN₃ (hydrogen azide)