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All results from a given calculation for H3PO (Phosphine oxide)

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-23.839017
Energy at 298.15K-23.843372
HF Energy-23.636683
Nuclear repulsion energy19.636538
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2325 2269 109.21      
2 A1 1175 1147 176.88      
3 A1 957 934 74.63      
4 E 2332 2276 131.81      
4 E 2332 2276 131.81      
5 E 1096 1069 50.86      
5 E 1096 1069 50.86      
6 E 750 732 11.86      
6 E 750 732 11.86      

Unscaled Zero Point Vibrational Energy (zpe) 6405.8 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 6252.1 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2/CEP-121G
ABC
3.34978 0.49036 0.49036

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.424
O2 0.000 0.000 -1.198
H3 0.000 1.290 1.074
H4 -1.117 -0.645 1.074
H5 1.117 -0.645 1.074

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.62201.44481.44481.4448
O21.62202.61322.61322.6132
H31.44482.61322.23462.2346
H41.44482.61322.23462.2346
H51.44482.61322.23462.2346

picture of Phosphine oxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 P1 H3 116.756 O2 P1 H4 116.756
O2 P1 H5 116.756 H3 P1 H4 101.303
H3 P1 H5 101.303 H4 P1 H5 101.303
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability