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

using model chemistry: QCISD(T)/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(T)/6-31G*
 hartrees
Energy at 0K-642.877885
Energy at 298.15K-642.883784
HF Energy-642.012832
Nuclear repulsion energy277.612443
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(T)/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 3751 3598        
2 A 1331 1277        
3 A 1096 1052        
4 A 826 793        
5 A 460 442        
6 A 317 304        
7 E 3749 3597        
7 E 3749 3597        
8 E 1108 1063        
8 E 1107 1062        
9 E 944 905        
9 E 943 905        
10 E 451 433        
10 E 451 433        
11 E 374 359        
11 E 372 357        
12 E 147 141        
12 E 143 137        

Unscaled Zero Point Vibrational Energy (zpe) 10659.9 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 10226.1 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(T)/6-31G*
ABC
0.14798 0.14595 0.14595

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.120
O2 0.000 0.000 1.601
O3 0.000 1.444 -0.596
O4 1.250 -0.722 -0.596
O5 -1.250 -0.722 -0.596
H6 0.554 2.073 -0.097
H7 1.518 -1.516 -0.097
H8 -2.072 -0.557 -0.097

Atom - Atom Distances (Å)
  P1 O2 O3 O4 O5 H6 H7 H8
P11.48101.61171.61171.61172.15622.15622.1562
O21.48102.62932.62932.62932.73602.73602.7360
O31.61172.62932.50052.50050.97543.36332.9228
O41.61172.62932.50052.50052.92280.97543.3633
O51.61172.62932.50052.50053.36332.92280.9754
H62.15622.73600.97542.92283.36333.71563.7156
H72.15622.73603.36330.97542.92283.71563.7156
H82.15622.73602.92283.36330.97543.71563.7156

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 110.486 P1 O4 H7 110.486
P1 O5 H8 110.486 O2 P1 O3 116.394
O2 P1 O4 116.394 O2 P1 O5 116.394
O3 P1 O4 101.746 O3 P1 O5 101.746
O4 P1 O5 101.746
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability