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

using model chemistry: MP2/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-83.003803
Energy at 298.15K-83.008182
HF Energy-82.805369
Nuclear repulsion energy24.188946
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/LANL2DZ
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 2349 2263 104.66      
2 A1 1201 1156 197.80      
3 A1 984 947 57.92      
4 E 2347 2260 133.52      
4 E 2347 2260 133.52      
5 E 1139 1097 51.04      
5 E 1139 1097 51.04      
6 E 779 751 12.99      
6 E 779 751 12.99      

Unscaled Zero Point Vibrational Energy (zpe) 6531.4 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 6290.4 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/LANL2DZ
ABC
3.43622 0.49119 0.49119

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.424
O2 0.000 0.000 -1.198
H3 0.000 1.274 1.076
H4 -1.103 -0.637 1.076
H5 1.103 -0.637 1.076

Atom - Atom Distances (Å)
  P1 O2 H3 H4 H5
P11.62181.43131.43131.4313
O21.62182.60692.60692.6069
H31.43132.60692.20632.2063
H41.43132.60692.20632.2063
H51.43132.60692.20632.2063

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 117.131 O2 P1 H4 117.131
O2 P1 H5 117.131 H3 P1 H4 100.839
H3 P1 H5 100.839 H4 P1 H5 100.839
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability