return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP3/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP3/cc-pVTZ
 hartrees
Energy at 0K-417.805727
Energy at 298.15K-417.810219
HF Energy-417.388973
Nuclear repulsion energy65.883421
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 MP3/cc-pVTZ
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 2498 2360 62.08      
2 A1 1310 1238 194.84      
3 A1 1192 1126 5.00      
4 E 2484 2347 92.38      
4 E 2484 2347 92.38      
5 E 1162 1097 30.99      
5 E 1162 1097 30.99      
6 E 872 824 31.89      
6 E 872 824 31.89      

Unscaled Zero Point Vibrational Energy (zpe) 7017.3 cm-1
Scaled (by 0.9447) Zero Point Vibrational Energy (zpe) 6629.2 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 MP3/cc-pVTZ
ABC
3.54902 0.58098 0.58098

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.380
O2 0.000 0.000 -1.095
H3 0.000 1.253 1.019
H4 -1.085 -0.627 1.019
H5 1.085 -0.627 1.019

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.47471.40701.40701.4070
O21.47472.45762.45762.4576
H31.40702.45762.17102.1710
H41.40702.45762.17102.1710
H51.40702.45762.17102.1710

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 117.023 O2 P1 H4 117.023
O2 P1 H5 117.023 H3 P1 H4 100.973
H3 P1 H5 100.973 H4 P1 H5 100.973
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability