return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2=FULL/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 MP2=FULL/3-21G*
 hartrees
Energy at 0K-639.375793
Energy at 298.15K-639.381803
HF Energy-638.783652
Nuclear repulsion energy278.596124
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=FULL/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 3620 3432 0.00      
2 A 1394 1321 229.11      
3 A 1019 966 155.78      
4 A 880 834 41.35      
5 A 494 468 53.12      
6 A 295 280 190.46      
7 E 3619 3431 112.55      
7 E 3619 3431 112.55      
8 E 1105 1048 94.21      
8 E 1105 1048 94.21      
9 E 935 887 353.25      
9 E 935 887 353.25      
10 E 470 446 101.93      
10 E 470 446 101.93      
11 E 389 369 22.03      
11 E 389 369 22.03      
12 E 153 145 103.05      
12 E 153 145 103.05      

Unscaled Zero Point Vibrational Energy (zpe) 10522.7 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 9975.5 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 MP2=FULL/3-21G*
ABC
0.14950 0.14708 0.14708

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.126
O2 0.000 0.000 1.604
O3 0.000 1.431 -0.586
O4 1.239 -0.716 -0.586
O5 -1.239 -0.716 -0.586
H6 0.632 2.096 -0.220
H7 1.499 -1.595 -0.220
H8 -2.131 -0.500 -0.220

Atom - Atom Distances (Å)
  P1 O2 O3 O4 O5 H6 H7 H8
P11.47781.59831.59831.59832.21642.21642.2164
O21.47782.61572.61572.61572.84962.84962.8496
O31.59832.61572.47872.47870.98753.39712.8993
O41.59832.61572.47872.47872.89930.98753.3971
O51.59832.61572.47872.47873.39712.89930.9875
H62.21642.84960.98752.89933.39713.79183.7918
H72.21642.84963.39710.98752.89933.79183.7918
H82.21642.84962.89933.39710.98753.79183.7918

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 115.982 P1 O4 H7 115.982
P1 O5 H8 115.982 O2 P1 O3 116.440
O2 P1 O4 116.440 O2 P1 O5 116.440
O3 P1 O4 101.690 O3 P1 O5 101.690
O4 P1 O5 101.690
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability