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/6-311G**

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/6-311G**
 hartrees
Energy at 0K-417.866840
Energy at 298.15K-417.871331
HF Energy-417.354800
Nuclear repulsion energy65.326367
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/6-311G**
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 2489 2393        
2 A1 1306 1256        
3 A1 1168 1123        
4 E 2461 2366        
4 E 2460 2366        
5 E 1167 1122        
5 E 1167 1122        
6 E 876 843        
6 E 876 842        

Unscaled Zero Point Vibrational Energy (zpe) 6985.1 cm-1
Scaled (by 0.9615) Zero Point Vibrational Energy (zpe) 6716.2 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 MP4=FULL/6-311G**
ABC
3.58243 0.56845 0.56845

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-311G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.383
O2 0.000 0.000 -1.108
H3 0.000 1.248 1.040
H4 -1.080 -0.624 1.040
H5 1.080 -0.624 1.040

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.49111.40981.40981.4098
O21.49112.48382.48382.4838
H31.40982.48382.16082.1608
H41.40982.48382.16082.1608
H51.40982.48382.16082.1608

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 117.760 O2 P1 H4 117.760
O2 P1 H5 117.760 H3 P1 H4 100.054
H3 P1 H5 100.054 H4 P1 H5 100.054
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability