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

using model chemistry: CISD/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 CISD/3-21G
 hartrees
Energy at 0K-415.284981
Energy at 298.15K-415.289395
HF Energy-415.082063
Nuclear repulsion energy62.093287
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 CISD/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 2320 2184 100.94      
2 A1 1266 1192 161.00      
3 A1 1009 950 7.82      
4 E 2255 2122 169.18      
4 E 2255 2122 169.18      
5 E 1100 1035 59.54      
5 E 1100 1035 59.54      
6 E 819 771 25.03      
6 E 819 771 25.03      

Unscaled Zero Point Vibrational Energy (zpe) 6471.2 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 6091.3 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 CISD/3-21G
ABC
3.48318 0.50445 0.50445

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.415
O2 0.000 0.000 -1.181
H3 0.000 1.265 1.077
H4 -1.096 -0.633 1.077
H5 1.096 -0.633 1.077

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.59591.42821.42821.4282
O21.59592.58872.58872.5887
H31.42822.58872.19142.1914
H41.42822.58872.19142.1914
H51.42822.58872.19142.1914

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 117.641 O2 P1 H4 117.641
O2 P1 H5 117.641 H3 P1 H4 100.205
H3 P1 H5 100.205 H4 P1 H5 100.205
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability