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Experimental data for NaOH (sodium hydroxide)

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Other names
Aetznatron; Ascarite; Caustic soda; Collo-Grillrein; Collo-Tapetta; Fuers Rohr; Hydroxyde de sodium; Liquid-plumr; Lye; Natriumhydroxid; Natriumhydroxyde; Plung; Rohrputz; Rohrreiniger Rofix; Soda lye; Soda, caustic; Sodio(idrossido di); Sodium hydrate; Sodium Hydroxide; Sodium hydroxide (Na(OH)); Sodium hydroxide, anhydrous; Sodium(hydroxyde de); White caustic;
INChI INChIKey SMILES IUPAC name
InChI=1S/Na.H2O/h;1H2/q+1;/p-1 HEMHJVSKTPXQMS-UHFFFAOYSA-M [Na]O Sodium Hydroxide
State Conformation
1Σ C*V
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) enthalpy of formation -191.00 8.00 kJ mol-1 JANAF
Hfg(0K) enthalpy of formation -187.36 8.00 kJ mol-1 JANAF
Entropy (298.15K) entropy 228.98 0.42 J K-1 mol-1 JANAF
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 11.40 0.15 kJ mol-1 1996Gur/Ber:1211
Heat Capacity (298.15K) heat capacity 47.97 0.50 J K-1 mol-1 1996Gur/Ber:1211
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 Σ 3637   1955Bus:933       Crystal value OH stretch
2 Σ 540   1996Gur/Ber:1211       NaO stretch
3 Π 300   1996Gur/Ber:1211       NaOH bend

vibrational zero-point energy: 2388.5 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for NaOH (sodium hydroxide).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
  0.42670   JANAF

Calculated rotational constants for NaOH (sodium hydroxide).
Product of moments of inertia moments of inertia
39.50671amu Å2   6.560346E-39gm cm2
Geometric Data
picture of sodium hydroxide

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
rNaO 1.950   1 2 1998Kuc

Cartesians
Atom x (Å) y (Å) z (Å)
O1 0.0000 0.0000 -1.0254
Na2 0.0000 0.0000 0.9246
H3 0.0000 0.0000 -1.9668

Atom - Atom Distances bond lengths
Distances in Å
  O1 Na2 H3
O1   1.95000.9414
Na2 1.9500   2.8914
H3 0.94142.8914  

Calculated geometries for NaOH (sodium hydroxide).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle
Na2 O1 H3 180.000

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-O 1
O-Na 1

Connectivity
Atom 1 Atom 2
O1 Na2
O1 H3
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1Σ
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1Σ C∞v True           C∞v 1 1
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for NaOH (sodium hydroxide).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1Σ C∞v True       C∞v 1 1

Calculated electric quadrupole moments for NaOH (sodium hydroxide).

References
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squib reference DOI
1955Bus:933 W R Busing "Infrared Spectra and Structure of NaOH and NaOD" J. Chem. Phys. 23 (5), 933, 1955 10.1063/1.1742150
1996Gur/Ber:1211 Gurvich LV, Bergman GA, Gorokhov LN, et al."Thermodynamic properties of alkali metal hydroxides .1. Lithium and sodium hydroxides"J PHYS CHEM REF DATA 25 (4): 1211-1276 JUL-AUG 1996 10.1063/1.555982
1998Kuc K Kuchitsu(ed) "Structure of Free Polyatomic Molecules - Basic Data" Springer, Berlin, 1998 10.1007/978-3-642-45748-7 
JANAF Chase, M.W., Jr.; Davies, C.A.; Downey, J.R., Jr.; Frurip, D.J.; McDonald, R.A.; Syverud, A.N., JANAF Thermochemical Tables (Third Edition), J. Phys. Chem. Ref. Data,Suppl. 1, 1985, 14, 1.  

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