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

using model chemistry: MP2=FULL/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=FULL/3-21G*
 hartrees
Energy at 0K-415.511915
Energy at 298.15K-415.516428
HF Energy-415.264398
Nuclear repulsion energy65.035897
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=FULL/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 2551 2418 101.91      
2 A1 1372 1300 196.02      
3 A1 1203 1141 0.40      
4 E 2513 2382 159.74      
4 E 2513 2382 159.74      
5 E 1159 1099 61.45      
5 E 1159 1099 61.45      
6 E 920 872 38.61      
6 E 920 872 38.61      

Unscaled Zero Point Vibrational Energy (zpe) 7154.5 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 6782.5 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=FULL/3-21G*
ABC
3.62321 0.56126 0.56126

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/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 -1.074 -0.620 1.052
H5 1.074 -0.620 1.052

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.50111.40831.40831.4083
O21.50112.49762.49762.4976
H31.40832.49762.14862.1486
H41.40832.49762.14862.1486
H51.40832.49762.14862.1486

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 118.255 O2 P1 H4 118.255
O2 P1 H5 118.255 H3 P1 H4 99.430
H3 P1 H5 99.430 H4 P1 H5 99.430
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability