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All results from a given calculation for H3PO4 (Phosphoric Acid)

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-642.843724
Energy at 298.15K-642.849638
HF Energy-642.012950
Nuclear repulsion energy277.700014
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 MP2/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3775 3560 18.80      
2 A 1340 1264 296.23      
3 A 1090 1028 101.46      
4 A 833 786 18.09      
5 A 461 435 40.07      
6 A 318 300 108.55      
7 E 3773 3558 186.71      
7 E 3773 3558 186.71      
8 E 1101 1038 94.79      
8 E 1101 1038 94.79      
9 E 945 891 334.40      
9 E 945 891 334.40      
10 E 454 428 90.52      
10 E 454 428 90.52      
11 E 376 354 34.98      
11 E 376 354 34.98      
12 E 146 138 83.41      
12 E 146 138 83.41      

Unscaled Zero Point Vibrational Energy (zpe) 10702.0 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 10092.0 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 MP2/6-31G*
ABC
0.14825 0.14596 0.14596

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.118
O2 0.000 0.000 1.594
O3 0.000 1.433 -0.594
O4 1.241 -0.717 -0.594
O5 -1.241 -0.717 -0.594
H6 0.509 2.090 -0.090
H7 1.555 -1.486 -0.090
H8 -2.065 -0.604 -0.090

Atom - Atom Distances (Å)
  P1 O2 O3 O4 O5 H6 H7 H8
P11.47581.60031.60031.60032.16122.16122.1612
O21.47582.61512.61512.61512.73172.73172.7317
O31.60032.61512.48282.48280.97163.34602.9440
O41.60032.61512.48282.48282.94400.97163.3460
O51.60032.61512.48282.48283.34602.94400.9716
H62.16122.73170.97162.94403.34603.72593.7259
H72.16122.73173.34600.97162.94403.72593.7259
H82.16122.73172.94403.34600.97163.72593.7259

picture of Phosphoric Acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
P1 O3 H6 112.018 P1 O4 H7 112.018
P1 O5 H8 112.018 O2 P1 O3 116.395
O2 P1 O4 116.395 O2 P1 O5 116.395
O3 P1 O4 101.745 O3 P1 O5 101.745
O4 P1 O5 101.745
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability