CCCBDB listing of experimental data page 2

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Mode Number	Symmetry	Frequency			Intensity			Comment	Description
Mode Number	Symmetry	Fundamental(cm^-1)	Harmonic(cm^-1)	Reference	(km mol^-1)	unc.	Reference	Comment	Description
3	T₂	3343		webbook
4	T₂	1447

Description	Value	unc.	Connectivity				Reference	Comment
Description	Value	unc.	Atom 1	Atom 2	Atom 3	Atom 4	Reference	Comment
rHN	1.029	0.000	1	2			1998Kuc	r0

Atom	x (Å)	y (Å)	z (Å)
N1	0.0000	0.0000	0.0000
H2	0.5939	0.5939	0.5939
H3	-0.5939	-0.5939	0.5939
H4	-0.5939	0.5939	-0.5939
H5	0.5939	-0.5939	-0.5939

	N1	H2	H3	H4	H5
N1		1.0287	1.0287	1.0287	1.0287
H2	1.0287		1.6799	1.6799	1.6799
H3	1.0287	1.6799		1.6799	1.6799
H4	1.0287	1.6799	1.6799		1.6799
H5	1.0287	1.6799	1.6799	1.6799

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
H2	N1	H3	109.471	H2	N1	H4	109.471
H2	N1	H5	109.471	H3	N1	H4	109.471
H3	N1	H5	109.471	H4	N1	H5	109.471

	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	¹A₁	T_d	True							T_d	0	0

squib	reference	DOI
1998Kuc	K Kuchitsu(ed) "Structure of Free Polyatomic Molecules - Basic Data" Springer, Berlin, 1998	10.1007/978-3-642-45748-7
webbook	NIST Chemistry Webbook (http://webbook.nist.gov/chemistry)	10.18434/T4D303

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Experimental data for NH4+ (ammonium cation)

Experimental data for NH₄⁺ (ammonium cation)