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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-415.496997
Energy at 298.15K-415.501510
HF Energy-415.264361
Nuclear repulsion energy65.020671
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 MP2/3-21G*
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 2552 2428 102.24      
2 A1 1371 1304 196.29      
3 A1 1202 1144 0.48      
4 E 2513 2391 160.11      
4 E 2513 2391 160.11      
5 E 1159 1102 61.56      
5 E 1159 1102 61.56      
6 E 920 875 38.50      
6 E 920 875 38.50      

Unscaled Zero Point Vibrational Energy (zpe) 7154.6 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 6806.2 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 MP2/3-21G*
ABC
3.62185 0.56098 0.56098

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.385
O2 0.000 0.000 -1.116
H3 0.000 1.241 1.052
H4 -1.075 -0.620 1.052
H5 1.075 -0.620 1.052

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.50151.40851.40851.4085
O21.50152.49812.49812.4981
H31.40852.49812.14902.1490
H41.40852.49812.14902.1490
H51.40852.49812.14902.1490

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 118.249 O2 P1 H4 118.249
O2 P1 H5 118.249 H3 P1 H4 99.437
H3 P1 H5 99.437 H4 P1 H5 99.437
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability