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

using model chemistry: TPSSh/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 TPSSh/6-31G(2df,p)
 hartrees
Energy at 0K-266.218167
Energy at 298.15K-266.223431
HF Energy-266.218167
Nuclear repulsion energy125.314301
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 TPSSh/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 3822 3688 55.50      
2 A 3539 3416 338.80      
3 A 3141 3031 583.78      
4 A 3048 2942 169.82      
5 A 1776 1714 275.76      
6 A 1685 1626 84.62      
7 A 1488 1436 1.85      
8 A 1398 1349 14.69      
9 A 1232 1189 172.59      
10 A 1084 1046 31.31      
11 A 1007 971 67.39      
12 A 755 729 263.13      
13 A 692 668 30.70      
14 A 420 406 79.66      
15 A 356 344 61.53      
16 A 267 258 50.32      
17 A 218 210 20.49      
18 A 212 204 2.06      

Unscaled Zero Point Vibrational Energy (zpe) 13070.1 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 12612.6 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 TPSSh/6-31G(2df,p)
ABC
0.39041 0.17486 0.12207

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.348 0.992 0.018
O2 -0.635 1.127 0.010
O3 1.820 0.066 -0.083
C4 -1.160 -0.090 0.003
O5 -0.543 -1.138 0.013
H6 -2.257 -0.035 -0.010
H7 2.450 -0.114 0.624
H8 1.277 -0.738 -0.175

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H10.99241.74221.85622.30852.80012.45081.9726
O20.99242.67661.32602.26731.99533.38122.6774
O31.74222.67662.98582.65374.07930.96300.9744
C41.85621.32602.98581.21621.09843.66272.5279
O52.30852.26732.65371.21622.03893.22091.8726
H62.80011.99534.07931.09842.03894.74973.6070
H72.45083.38120.96303.66273.22094.74971.5497
H81.97262.67740.97442.52791.87263.60701.5497

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 105.477 H1 O3 H7 127.521
H1 O3 H8 88.422 O2 H1 O3 155.409
O2 C4 O5 126.156 O2 C4 H6 110.424
O5 C4 H6 123.420 H7 O3 H8 106.237
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability