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

using model chemistry: B3LYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-266.224507
Energy at 298.15K-266.229672
HF Energy-266.224507
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy124.928990
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 B3LYP/6-31G(2df,p)
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 3855 3720 64.99      
2 A 3626 3499 272.45      
3 A 3259 3145 611.34      
4 A 3043 2937 100.53      
5 A 1794 1731 292.35      
6 A 1674 1615 82.89      
7 A 1486 1434 2.32      
8 A 1401 1352 15.07      
9 A 1236 1193 182.93      
10 A 1081 1043 13.17      
11 A 985 951 94.06      
12 A 737 711 217.10      
13 A 691 667 67.40      
14 A 401 387 80.93      
15 A 337 325 62.97      
16 A 250 241 45.11      
17 A 209 202 23.82      
18 A 202 195 2.70      

Unscaled Zero Point Vibrational Energy (zpe) 13133.7 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 12674.0 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 B3LYP/6-31G(2df,p)
ABC
0.39228 0.17052 0.12007

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.428 0.940 -0.039
O2 -0.548 1.132 -0.003
O3 1.887 -0.016 -0.093
C4 -1.184 -0.027 0.017
O5 -0.669 -1.125 -0.002
H6 -2.273 0.125 0.056
H7 2.319 -0.059 0.766
H8 1.271 -0.773 -0.102

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H10.99541.74501.88122.33872.82302.28571.9108
O20.99542.69331.32292.26041.99843.19892.6363
O31.74502.69333.07262.78684.16450.96330.9757
C41.88121.32293.07261.21261.10013.58262.5687
O52.33872.26042.78681.21262.03443.26391.9739
H62.82301.99844.16451.10012.03444.65043.6594
H72.28573.19890.96333.58263.26394.65041.5369
H81.91082.63630.97572.56871.97393.65941.5369

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 107.639 H1 O3 H7 111.858
H1 O3 H8 84.171 O2 H1 O3 157.874
O2 C4 O5 126.070 O2 C4 H6 110.796
O5 C4 H6 123.134 H7 O3 H8 104.859
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability