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: MP4=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP4=FULL/6-31G*
 hartrees
Energy at 0K-417.636529
Energy at 298.15K-417.640997
HF Energy-417.303876
Nuclear repulsion energy64.833532
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 MP4=FULL/6-31G*
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 2475 2380        
2 A1 1301 1251        
3 A1 1154 1109        
4 E 2457 2363        
4 E 2457 2362        
5 E 1129 1085        
5 E 1128 1085        
6 E 873 840        
6 E 873 840        

Unscaled Zero Point Vibrational Energy (zpe) 6922.9 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 6657.1 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 MP4=FULL/6-31G*
ABC
3.52605 0.55987 0.55987

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.387
O2 0.000 0.000 -1.117
H3 0.000 1.257 1.044
H4 -1.089 -0.629 1.044
H5 1.089 -0.629 1.044

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.50321.41901.41901.4190
O21.50322.50002.50002.5000
H31.41902.50002.17802.1780
H41.41902.50002.17802.1780
H51.41902.50002.17802.1780

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 117.604 O2 P1 H4 117.604
O2 P1 H5 117.604 H3 P1 H4 100.251
H3 P1 H5 100.251 H4 P1 H5 100.251
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability