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

using model chemistry: MP2/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-71.276279
Energy at 298.15K-71.281536
HF Energy-70.693199
Nuclear repulsion energy101.796766
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-121G
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 3650 3563 5.80      
2 A 1077 1051 345.95      
3 A 1037 1012 17.28      
4 A 649 634 45.55      
5 A 374 365 60.51      
6 A 285 278 230.10      
7 E 3648 3560 161.62      
7 E 3648 3560 161.62      
8 E 1058 1033 57.04      
8 E 1058 1033 57.04      
9 E 737 719 295.52      
9 E 737 719 295.52      
10 E 355 347 71.79      
10 E 355 347 71.79      
11 E 307 300 46.75      
11 E 307 300 46.75      
12 E 142 138 93.71      
12 E 142 138 93.71      

Unscaled Zero Point Vibrational Energy (zpe) 9783.4 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 9548.6 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-121G
ABC
0.13252 0.12626 0.12626

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.162
O2 0.000 0.000 1.750
O3 0.000 1.524 -0.642
O4 1.320 -0.762 -0.642
O5 -1.320 -0.762 -0.642
H6 0.667 2.184 -0.343
H7 1.558 -1.670 -0.343
H8 -2.225 -0.515 -0.343

Atom - Atom Distances (Å)
  P1 O2 O3 O4 O5 H6 H7 H8
P11.58791.72301.72301.72302.33882.33882.3388
O21.58792.83612.83612.83613.09763.09763.0976
O31.72302.83612.63952.63950.98483.56583.0323
O41.72302.83612.63952.63953.03230.98483.5658
O51.72302.83612.63952.63953.56583.03230.9848
H62.33883.09760.98483.03233.56583.95533.9553
H72.33883.09763.56580.98483.03233.95533.9553
H82.33883.09763.03233.56580.98483.95533.9553

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 116.820 P1 O4 H7 116.820
P1 O5 H8 116.820 O2 P1 O3 117.816
O2 P1 O4 117.816 O2 P1 O5 117.816
O3 P1 O4 99.984 O3 P1 O5 99.984
O4 P1 O5 99.984
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability