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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-24.074228
Energy at 298.15K-24.078668
HF Energy-23.772197
Nuclear repulsion energy20.502091
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 2419 2304 94.01      
2 A1 1239 1181 205.60      
3 A1 1131 1077 2.60      
4 E 2420 2306 121.78      
4 E 2420 2306 121.78      
5 E 1117 1065 39.11      
5 E 1117 1065 39.11      
6 E 834 794 23.41      
6 E 834 794 23.41      

Unscaled Zero Point Vibrational Energy (zpe) 6765.3 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 6445.9 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
3.44128 0.54942 0.54942

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 0.392
O2 0.000 0.000 -1.127
H3 0.000 1.273 1.045
H4 -1.102 -0.636 1.045
H5 1.102 -0.636 1.045

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.51911.43061.43061.4306
O21.51912.51762.51762.5176
H31.43062.51762.20472.2047
H41.43062.51762.20472.2047
H51.43062.51762.20472.2047

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 117.159 O2 P1 H4 117.159
O2 P1 H5 117.159 H3 P1 H4 100.805
H3 P1 H5 100.805 H4 P1 H5 100.805
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability