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

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-417.841085
Energy at 298.15K-417.837118
HF Energy-417.302435
Nuclear repulsion energy66.449404
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 CBS-Q
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 2693 2693 101.17      
2 A1 1394 1394 326.42      
3 A1 1279 1279 15.91      
4 E 2665 2665 179.23      
4 E 2665 2665 179.23      
5 E 1243 1243 76.73      
5 E 1243 1243 76.73      
6 E 958 958 62.88      
6 E 958 958 62.88      

Unscaled Zero Point Vibrational Energy (zpe) 7548.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7548.9 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 CBS-Q
ABC
3.56309 0.56772 0.56772

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.378
O2 0.000 0.000 -1.086
H3 0.000 1.241 1.009
H4 -1.075 -0.620 1.009
H5 1.075 -0.620 1.009

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.46381.39251.39251.3925
O21.46382.43552.43552.4355
H31.39252.43552.14932.1493
H41.39252.43552.14932.1493
H51.39252.43552.14932.1493

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 116.985 O2 P1 H4 116.985
O2 P1 H5 116.985 H3 P1 H4 101.020
H3 P1 H5 101.020 H4 P1 H5 101.020
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability