return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for H2OHCOOH (Water formic acid dimer 2)

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-265.576915
Energy at 298.15K-265.581138
HF Energy-264.849490
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy117.472080
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 MP2/6-311G*
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 3964 3767 73.17      
2 A 3816 3627 55.29      
3 A 3766 3578 62.43      
4 A 3180 3022 13.38      
5 A 1810 1720 323.05      
6 A 1770 1682 101.08      
7 A 1436 1364 3.27      
8 A 1350 1283 8.72      
9 A 1182 1123 253.97      
10 A 1098 1044 4.97      
11 A 737 701 179.55      
12 A 648 615 32.17      
13 A 567 539 383.94      
14 A 280 266 121.31      
15 A 206 196 140.96      
16 A 172 163 1.62      
17 A 105 99 16.15      
18 A 97 92 20.78      

Unscaled Zero Point Vibrational Energy (zpe) 13091.1 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 12440.5 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 MP2/6-311G*
ABC
0.75822 0.09443 0.08454

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.827 0.447 -0.102
O2 -2.436 -0.296 -0.093
O3 0.222 0.950 0.005
H4 -2.963 -0.223 0.702
C5 0.681 -0.167 0.010
O6 1.982 -0.468 0.004
H7 0.079 -1.082 0.022
H8 2.477 0.362 -0.010

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.96042.11231.54512.58503.91952.44724.3063
O20.96042.93650.95683.12134.42262.63754.9575
O32.11232.93653.46491.20802.26082.03722.3311
H41.54510.95683.46493.71005.00063.23375.5179
C52.58503.12131.20803.71001.33561.09541.8724
O63.91954.42262.26085.00061.33561.99990.9663
H72.44722.63752.03723.23371.09541.99992.7994
H84.30634.95752.33115.51791.87240.96632.7994

picture of Water formic acid dimer 2 state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 107.401 H1 O3 C5 98.576
O2 H1 O3 142.957 O3 C5 O6 125.382
O3 C5 H7 124.298 C5 O6 H8 107.785
O6 C5 H7 110.320
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability