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

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-417.603909
Energy at 298.15K-417.608400
HF Energy-417.305513
Nuclear repulsion energy65.393254
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 MP3/6-31G*
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 2533 2377 94.45      
2 A1 1326 1244 249.61      
3 A1 1208 1134 1.29      
4 E 2516 2362 148.03      
4 E 2516 2362 148.03      
5 E 1149 1078 55.42      
5 E 1149 1078 55.42      
6 E 894 839 37.88      
6 E 894 839 37.88      

Unscaled Zero Point Vibrational Energy (zpe) 7091.5 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 6656.0 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 MP3/6-31G*
ABC
3.54030 0.57103 0.57103

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

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 -1.105
H3 0.000 1.255 1.032
H4 -1.087 -0.627 1.032
H5 1.087 -0.627 1.032

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.48781.41271.41271.4127
O21.48782.47782.47782.4778
H31.41272.47782.17362.1736
H41.41272.47782.17362.1736
H51.41272.47782.17362.1736

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 117.335 O2 P1 H4 117.335
O2 P1 H5 117.335 H3 P1 H4 100.586
H3 P1 H5 100.586 H4 P1 H5 100.586
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability