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

using model chemistry: MP2/CEP-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 MP2/CEP-31G
 hartrees
Energy at 0K-23.805091
Energy at 298.15K-23.809413
HF Energy-23.624405
Nuclear repulsion energy19.532186
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/CEP-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 2257 2181 158.67      
2 A1 1163 1123 179.39      
3 A1 938 906 63.74      
4 E 2279 2202 207.84      
4 E 2279 2202 207.84      
5 E 1093 1056 48.37      
5 E 1093 1056 48.37      
6 E 735 710 7.13      
6 E 735 710 7.13      

Unscaled Zero Point Vibrational Energy (zpe) 6285.0 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 6073.2 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 MP2/CEP-31G
ABC
3.32322 0.48472 0.48472

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.427
O2 0.000 0.000 -1.205
H3 0.000 1.295 1.081
H4 -1.122 -0.648 1.081
H5 1.122 -0.648 1.081

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.63171.45111.45111.4511
O21.63172.62742.62742.6274
H31.45112.62742.24352.2435
H41.45112.62742.24352.2435
H51.45112.62742.24352.2435

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 116.796 O2 P1 H4 116.796
O2 P1 H5 116.796 H3 P1 H4 101.253
H3 P1 H5 101.253 H4 P1 H5 101.253
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability