Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)

Property	Value	Uncertainty	units	Reference	Comment
Hfg(298.15K)	267.40	50.00	kJ mol-1	Gurvich
Hfg(0K)	266.75	50.00	kJ mol-1	Gurvich
Entropy (298.15K)	222.09		J K-1 mol-1	Gurvich
Integrated Heat Capacity (0 to 298.15K)	9.39		kJ mol-1	Gurvich
Heat Capacity (298.15K)	31.80		J K-1 mol-1	Gurvich

Information can also be found for this species in the NIST Chemistry Webbook

Vibrational levels (cm^-1)

Mode Number	Symmetry	Frequency (cm-1)	Frequency Reference	Intensity (km mol-1)	Int. unc.	Intensity Reference	Comment
1	Σ	1219	1979HUB/HER

Detailed diatomic data

ωe	ωexe	ωeye	Be	αe	ZPE	reference
1218.7	7.28		0.772379	6.284114E-03	607.6133	2007Iri:389

vibrational zero-point energy: 609.3 cm^-1
Calculated vibrational frequencies for NS^- (nitrogen sulfide anion).

Rotational Constants (cm^-1)
See section I.F.4 to change rotational constant units

A	B	C	reference	comment
	0.76960		1979HUB/HER

Calculated rotational constants for NS^- (nitrogen sulfide anion).

Product of moments of inertia
21.90435	amu Å2		3.637359E-39	gm cm2

Geometric Data

Point Group C_∞v

Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees

Description	Value	unc.	Connectivity				Reference	Comment
			Atom 1	Atom 2	Atom 3	Atom 4
rNS	1.497	0.000	1	2			NISTdiatomic	r0

Cartesians

Atom	x (Å)	y (Å)	z (Å)
S1	0.0000	0.0000	0.0000
N2	0.0000	0.0000	1.4940

Atom - Atom Distances
Distances in Å

	S1	N2
S1		1.4940
N2	1.4940

Calculated geometries for NS^- (nitrogen sulfide anion).

Bond descriptions
Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond

Bond Type	Count
N=S	1

Connectivity

Atom 1	Atom 2
S1	N2

Electronic energy levels (cm^-1)

Energy (cm-1)	Degeneracy	reference	description
0	2	1979HUB/HER	2Π
221.5	2	1979HUB/HER

Ionization Energies (eV)

Ionization Energy	I.E. unc.	vertical I.E.	v.I.E. unc.	Electron Affinity	E.A. unc.	reference
8.870	0.010	8.870	0.010	1.194	0.011	webbook

Dipole, Quadrupole and Polarizability
Electric dipole moment

Dipole (Debye)	Reference	comment
1.810	NISTdiatomic

Calculated electric dipole moments for NS^- (nitrogen sulfide anion).
Electric quadrupole moment
Calculated electric quadrupole moments for NS^- (nitrogen sulfide anion).

References
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squib	reference	DOI
1979HUB/HER	Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules,, Van Nostrand Reinhold Co., 1979
2007Iri:389	KK Irikura "Experimental Vibrational Zero-Point Energies: Diatomic Molecules" J. Phys. Chem. Ref. Data 36(2), 389, 2007	10.1063/1.2436891
Gurvich	Gurvich, L.V.; Veyts, I. V.; Alcock, C. B., Thermodynamic Properties of Individual Substances, Fouth Edition, Hemisphere Pub. Co., New York, 1989	10.1351/pac198961061027
NISTdiatomic	NIST Diatomic Spectral Database (www.physics.nist.gov/PhysRefData/MolSpec/Diatomic/index.html)
webbook	NIST Chemistry Webbook (http://webbook.nist.gov/chemistry)

Got a better number? Please email us at cccbdb@nist.gov