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

using model chemistry: CID/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A
Energy calculated at CID/3-21G*
 hartrees
Energy at 0K-639.287202
Energy at 298.15K-639.293296
HF Energy-638.787233
Nuclear repulsion energy280.838531
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 CID/3-21G*
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 3763 3502 1.17      
2 A 1439 1339 290.85      
3 A 1031 960 196.66      
4 A 925 861 34.42      
5 A 512 476 55.62      
6 A 286 266 205.64      
7 E 3759 3498 142.60      
7 E 3759 3498 142.60      
8 E 1134 1055 131.76      
8 E 1134 1055 131.76      
9 E 958 891 355.28      
9 E 958 891 355.28      
10 E 493 459 132.61      
10 E 493 459 132.61      
11 E 402 374 20.46      
11 E 402 374 20.46      
12 E 149 139 109.62      
12 E 149 139 109.62      

Unscaled Zero Point Vibrational Energy (zpe) 10872.1 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 10116.5 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 CID/3-21G*
ABC
0.15065 0.14992 0.14992

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.119
O2 0.000 0.000 1.583
O3 0.000 1.425 -0.575
O4 1.234 -0.712 -0.575
O5 -1.234 -0.712 -0.575
H6 0.606 2.105 -0.221
H7 1.519 -1.578 -0.221
H8 -2.126 -0.527 -0.221

Atom - Atom Distances (Å)
  P1 O2 O3 O4 O5 H6 H7 H8
P11.46321.58471.58471.58472.21662.21662.2166
O21.46322.58522.58522.58522.83742.83742.8374
O31.58472.58522.46762.46760.97733.38332.9075
O41.58472.58522.46762.46762.90750.97733.3833
O51.58472.58522.46762.46763.38332.90750.9773
H62.21662.83740.97732.90753.38333.79373.7937
H72.21662.83743.38330.97732.90753.79373.7937
H82.21662.83742.90753.38330.97733.79373.7937

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 117.842 P1 O4 H7 117.842
P1 O5 H8 117.842 O2 P1 O3 115.972
O2 P1 O4 115.972 O2 P1 O5 115.972
O3 P1 O4 102.258 O3 P1 O5 102.258
O4 P1 O5 102.258
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability