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

using model chemistry: MP2=FULL/3-21G

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/3-21G
 hartrees
Energy at 0K-639.111256
Energy at 298.15K 
HF Energy-638.550980
Nuclear repulsion energy268.968718
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/3-21G
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 3618 3455 9.84      
2 A 1286 1228 152.08      
3 A 1040 993 114.77      
4 A 796 760 59.97      
5 A 455 435 70.94      
6 A 113 108 338.33      
7 E 3617 3453 108.69      
7 E 3617 3453 108.69      
8 E 1114 1064 84.05      
8 E 1114 1064 84.05      
9 E 900 860 267.74      
9 E 900 860 267.74      
10 E 426 406 81.39      
10 E 426 406 81.39      
11 E 341 326 1.08      
11 E 341 326 1.08      
12 E 146i 140i 82.21      
12 E 146i 140i 82.21      

Unscaled Zero Point Vibrational Energy (zpe) 9905.1 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 9457.4 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/3-21G
ABC
0.14217 0.13532 0.13532

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
P1 0.000 0.000 0.158
O2 0.000 0.000 1.704
O3 0.000 1.475 -0.600
O4 1.278 -0.738 -0.600
O5 -1.278 -0.738 -0.600
H6 0.838 1.994 -0.534
H7 1.308 -1.723 -0.534
H8 -2.146 -0.271 -0.534

Atom - Atom Distances (Å)
  P1 O2 O3 O4 O5 H6 H7 H8
P11.54601.65831.65831.65832.27102.27102.2710
O21.54602.73532.73532.73533.11233.11233.1123
O31.65832.73532.55522.55520.98813.45592.7674
O41.65832.73532.55522.55522.76740.98813.4559
O51.65832.73532.55522.55523.45592.76740.9881
H62.27103.11230.98812.76743.45593.74653.7465
H72.27103.11233.45590.98812.76743.74653.7465
H82.27103.11232.76743.45590.98813.74653.7465

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 115.894 P1 O4 H7 115.894
P1 O5 H8 115.894 O2 P1 O3 117.177
O2 P1 O4 117.177 O2 P1 O5 117.177
O3 P1 O4 100.783 O3 P1 O5 100.783
O4 P1 O5 100.783
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability