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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-642.895448
Energy at 298.15K-642.901406
HF Energy-642.036108
Nuclear repulsion energy278.643510
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
(Å4/u)
Dep P Dep U
1 A 3923 3694 18.52      
2 A 1344 1265 295.38      
3 A 1080 1017 102.22      
4 A 842 792 17.35      
5 A 464 437 35.77      
6 A 311 293 103.24      
7 E 3922 3692 158.23      
7 E 3922 3692 158.23      
8 E 1092 1028 81.60      
8 E 1092 1028 81.60      
9 E 949 894 339.31      
9 E 949 894 339.31      
10 E 459 432 93.98      
10 E 459 432 93.98      
11 E 378 356 34.68      
11 E 378 356 34.68      
12 E 152 143 80.27      
12 E 152 143 80.27      

Unscaled Zero Point Vibrational Energy (zpe) 10932.9 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 10292.3 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
0.14880 0.14700 0.14700

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 1.440 -0.593
O4 1.247 -0.720 -0.593
O5 -1.247 -0.720 -0.593
H6 0.532 2.071 -0.095
H7 1.527 -1.496 -0.095
H8 -2.059 -0.574 -0.095

Atom - Atom Distances (Å)
  P1 O2 O3 O4 O5 H6 H7 H8
P11.47661.60601.60601.60602.14862.14862.1486
O21.47662.61932.61932.61932.72512.72512.7251
O31.60602.61932.49372.49370.96423.34682.9233
O41.60602.61932.49372.49382.92330.96423.3468
O51.60602.61932.49372.49383.34682.92330.9642
H62.14862.72510.96422.92333.34683.70303.7030
H72.14862.72513.34680.96422.92333.70303.7030
H82.14862.72512.92333.34680.96423.70303.7030

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 110.954 P1 O4 H7 110.954
P1 O5 H8 110.954 O2 P1 O3 116.297
O2 P1 O4 116.297 O2 P1 O5 116.297
O3 P1 O4 101.865 O3 P1 O5 101.865
O4 P1 O5 101.865
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability