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

using model chemistry: G2

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A
Energy calculated at G2
 hartrees
Energy at 0K-643.408067
Energy at 298.15K-643.400765
HF Energy-642.018923
Nuclear repulsion energy283.166499
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 HF/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 4093 3856 50.41      
2 A 1436 1353 416.93      
3 A 1147 1081 145.23      
4 A 912 859 10.03      
5 A 495 466 31.06      
6 A 304 287 117.54      
7 E 4087 3851 249.74      
7 E 4087 3851 249.74      
8 E 1149 1083 117.33      
8 E 1149 1083 117.33      
9 E 1024 964 380.86      
9 E 1024 964 380.86      
10 E 505 476 135.84      
10 E 505 476 135.84      
11 E 404 380 34.52      
11 E 404 380 34.52      
12 E 169 159 95.24      
12 E 169 159 95.24      

Unscaled Zero Point Vibrational Energy (zpe) 11530.1 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 10863.7 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/6-31G*
ABC
0.14866 0.14638 0.14638

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

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 1.600
O3 0.000 1.440 -0.596
O4 1.247 -0.720 -0.596
O5 -1.247 -0.720 -0.596
H6 0.546 2.072 -0.093
H7 1.521 -1.508 -0.093
H8 -2.067 -0.563 -0.093

Atom - Atom Distances (Å)
  P1 O2 O3 O4 O5 H6 H7 H8
P11.48071.60801.60801.60802.15302.15302.1530
O21.48072.62632.62632.62632.73092.73092.7308
O31.60802.62632.49442.49440.97453.35582.9223
O41.60802.62632.49442.49442.92230.97453.3558
O51.60802.62632.49442.49443.35582.92230.9745
H62.15302.73090.97452.92233.35583.71093.7109
H72.15302.73093.35580.97452.92233.71093.7109
H82.15302.73082.92233.35580.97453.71093.7109

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 112.965 P1 O4 H7 112.965
P1 O5 H8 112.965 O2 P1 O3 115.541
O2 P1 O4 115.541 O2 P1 O5 115.541
O3 P1 O4 102.777 O3 P1 O5 102.777
O4 P1 O5 102.777
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability