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

using model chemistry: MP2=FULL/STO-3G

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/STO-3G
 hartrees
Energy at 0K-634.118232
Energy at 298.15K 
HF Energy-633.904099
Nuclear repulsion energy263.624423
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/STO-3G
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 3842 3416 71.76      
2 A 1391 1236 41.74      
3 A 1177 1046 61.84      
4 A 723 643 2.87      
5 A 347 308 11.55      
6 A 115 102 13.68      
7 E 3840 3413 12.64      
7 E 3840 3413 12.64      
8 E 1341 1192 17.66      
8 E 1341 1192 17.66      
9 E 858 763 138.41      
9 E 858 763 138.41      
10 E 320 285 22.76      
10 E 320 285 22.76      
11 E 256 227 46.52      
11 E 256 227 46.52      
12 E 55i 49i 43.35      
12 E 55i 49i 43.35      

Unscaled Zero Point Vibrational Energy (zpe) 10356.4 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 9205.8 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 MP2=FULL/STO-3G
ABC
0.13651 0.13001 0.13001

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

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.157
O2 0.000 0.000 1.692
O3 0.000 1.509 -0.667
O4 1.307 -0.754 -0.667
O5 -1.307 -0.754 -0.667
H6 0.375 2.137 0.041
H7 1.663 -1.394 0.041
H8 -2.039 -0.744 0.041

Atom - Atom Distances (Å)
  P1 O2 O3 O4 O5 H6 H7 H8
P11.53421.71961.71961.71962.17302.17302.1730
O21.53422.80032.80032.80032.72632.72632.7263
O31.71962.80032.61352.61351.01863.41953.1195
O41.71962.80032.61352.61353.11951.01863.4195
O51.71962.80032.61352.61353.41953.11951.0186
H62.17302.72631.01863.11953.41953.75843.7584
H72.17302.72633.41951.01863.11953.75843.7584
H82.17302.72633.11953.41951.01863.75843.7584

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 101.985 P1 O4 H7 101.985
P1 O5 H8 101.985 O2 P1 O3 118.662
O2 P1 O4 118.662 O2 P1 O5 118.662
O3 P1 O4 98.912 O3 P1 O5 98.912
O4 P1 O5 98.912
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability