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

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-642.860427
Energy at 298.15K-642.866380
HF Energy-642.014063
Nuclear repulsion energy278.237922
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 QCISD/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 3783 3603 17.98      
2 A 1345 1281 311.57      
3 A 1102 1050 99.42      
4 A 839 799 15.49      
5 A 465 443 41.91      
6 A 319 304 106.56      
7 E 3781 3601 159.84      
7 E 3781 3601 159.84      
8 E 1112 1059 98.79      
8 E 1112 1059 98.79      
9 E 954 909 329.27      
9 E 954 909 329.27      
10 E 458 436 98.29      
10 E 458 436 98.29      
11 E 378 360 32.24      
11 E 378 360 32.24      
12 E 150 143 82.28      
12 E 150 143 82.28      

Unscaled Zero Point Vibrational Energy (zpe) 10759.0 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 10245.8 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 QCISD/6-31G*
ABC
0.14836 0.14673 0.14673

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/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 1.595
O3 0.000 1.442 -0.594
O4 1.248 -0.721 -0.594
O5 -1.248 -0.721 -0.594
H6 0.548 2.073 -0.095
H7 1.522 -1.511 -0.095
H8 -2.070 -0.562 -0.095

Atom - Atom Distances (Å)
  P1 O2 O3 O4 O5 H6 H7 H8
P11.47691.60781.60781.60782.15522.15522.1552
O21.47692.62102.62102.62102.73092.73092.7309
O31.60782.62102.49692.49690.97343.35892.9236
O41.60782.62102.49692.49692.92360.97343.3589
O51.60782.62102.49692.49693.35892.92360.9734
H62.15522.73090.97342.92363.35893.71453.7145
H72.15522.73093.35890.97342.92363.71453.7145
H82.15522.73092.92363.35890.97343.71453.7145

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 110.816 P1 O4 H7 110.816
P1 O5 H8 110.816 O2 P1 O3 116.285
O2 P1 O4 116.285 O2 P1 O5 116.285
O3 P1 O4 101.878 O3 P1 O5 101.878
O4 P1 O5 101.878
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability