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All results from a given calculation for HCOOHH2O (Formic acid water dimer)

using model chemistry: MP2/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/TZVP
 hartrees
Energy at 0K-265.664511
Energy at 298.15K-265.669298
HF Energy-264.903459
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy123.917949
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/TZVP
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 3939 3733 103.95      
2 A 3766 3570 107.93      
3 A 3429 3250 619.28      
4 A 3138 2975 72.31      
5 A 1785 1692 313.35      
6 A 1613 1529 134.42      
7 A 1485 1408 0.65      
8 A 1415 1341 12.22      
9 A 1226 1162 246.79      
10 A 1081 1025 18.42      
11 A 922 874 159.18      
12 A 701 664 31.95      
13 A 531 504 152.96      
14 A 365 346 102.34      
15 A 265 251 103.24      
16 A 226 214 28.06      
17 A 182 173 43.15      
18 A 157 149 16.58      

Unscaled Zero Point Vibrational Energy (zpe) 13112.8 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 12429.6 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/TZVP
ABC
0.39267 0.16501 0.11676

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.406 0.938 0.005
O2 -0.563 1.135 0.008
O3 1.891 -0.002 -0.081
C4 -1.208 -0.029 0.006
O5 -0.691 -1.129 0.005
H6 -2.289 0.129 0.006
H7 2.636 -0.086 0.521
H8 1.405 -0.838 -0.020

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H10.98831.75961.88102.34032.81372.50792.0380
O20.98832.70541.33012.26711.99773.46212.7862
O31.75962.70543.09952.81874.18270.96140.9687
C41.88101.33013.09951.21501.09303.87812.7349
O52.34032.26712.81871.21502.03343.52472.1166
H62.81371.99774.18271.09302.03344.95643.8184
H72.50793.46210.96143.87813.52474.95641.5404
H82.03802.78620.96872.73492.11663.81841.5404

picture of Formic acid water dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 C4 107.538 H1 O3 H7 132.116
H1 O3 H8 91.995 O2 H1 O3 158.957
O2 C4 O5 125.875 O2 C4 H6 110.683
O5 C4 H6 123.442 H7 O3 H8 105.887
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability