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)	57.40	6.21	kJ mol-1	2005Se
Hfg(0K)		6.21	kJ mol-1	2005Se
Entropy (298.15K)	233.70	1.00	J K-1 mol-1	2005Se
Heat Capacity (298.15K)	32.52	0.25	J K-1 mol-1	2005Se

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	915	webbook				omega e

vibrational zero-point energy: 457.3 cm^-1
Calculated vibrational frequencies for SeO^- (selenium monoxide anion).

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

A	B	C	reference	comment
	0.47058	0.47058	NISTdiatomic

Calculated rotational constants for SeO^- (selenium monoxide anion).

Product of moments of inertia
35.82285	amu Å2		5.948616E-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
rSeO	1.639	0.001	1	2			NISTdiatomic	re

Cartesians

Atom	x (Å)	y (Å)	z (Å)
Se1	0.0000	0.0000	0.0000
O2	0.0000	0.0000	1.6395

Atom - Atom Distances
Distances in Å

	Se1	O2
Se1		1.6395
O2	1.6395

Calculated geometries for SeO^- (selenium monoxide anion).

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

Bond Type	Count
O-Se	1

Connectivity

Atom 1	Atom 2
Se1	O2

Electronic energy levels (cm^-1)

Energy (cm-1)	Degeneracy	reference	description
0	0	webbook	3Σ
165.9	2	webbook	1?
5300	2	webbook
9723.5	1	webbook

Ionization Energies (eV)

Ionization Energy	I.E. unc.	vertical I.E.	v.I.E. unc.	Electron Affinity	E.A. unc.	reference
				1.456	0.020	webbook

Dipole, Quadrupole and Polarizability
Electric dipole moment
Calculated electric dipole moments for SeO^- (selenium monoxide anion).
Electric quadrupole moment
Calculated electric quadrupole moments for SeO^- (selenium monoxide anion).

References
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squib	reference	DOI
2005Se	A Olin, B Nolang, G Osadchii, L-O Ohman, E Rosen, "CHEMICAL THERMODYNAMICS OF SELENIUM", OECD Nuclear Energy Agency, Elsevier, 2005
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