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

using model chemistry: MP3=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP3=FULL/6-31G*
 hartrees
Energy at 0K-265.478317
Energy at 298.15K-265.483305
HF Energy-264.787297
Nuclear repulsion energy123.775370
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 MP3=FULL/6-31G*
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 3888 3648 89.56      
2 A 3741 3510 127.59      
3 A 3477 3263 501.02      
4 A 3165 2970 68.74      
5 A 1887 1770 342.85      
6 A 1761 1652 119.35      
7 A 1519 1426 2.90      
8 A 1454 1364 18.65      
9 A 1275 1197 239.54      
10 A 1107 1039 8.39      
11 A 966 907 184.52      
12 A 724 680 99.49      
13 A 636 596 228.29      
14 A 371 348 102.16      
15 A 290 272 82.22      
16 A 243 228 36.33      
17 A 196 184 31.62      
18 A 191 179 6.67      

Unscaled Zero Point Vibrational Energy (zpe) 13445.6 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 12616.0 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 MP3=FULL/6-31G*
ABC
0.39135 0.16294 0.11610

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.397 0.968 -0.003
O2 -0.581 1.132 0.006
O3 1.890 0.006 -0.086
C4 -1.199 -0.040 0.009
O5 -0.667 -1.130 0.003
H6 -2.286 0.092 0.018
H7 2.582 -0.082 0.582
H8 1.358 -0.809 -0.036

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H10.99151.77791.88762.35252.82272.49372.0209
O20.99152.71661.32492.26361.99753.43642.7441
O31.77792.71663.09002.79864.17760.96610.9739
C41.88761.32493.09001.21281.09523.82412.6705
O52.35252.26362.79861.21282.02833.46222.0508
H62.82271.99754.17761.09522.02834.90363.7543
H72.49373.43640.96613.82413.46224.90361.5514
H82.02092.74410.97392.67052.05083.75431.5514

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 108.286 H1 O3 H7 128.196
H1 O3 H8 89.578 O2 H1 O3 156.600
O2 C4 O5 126.192 O2 C4 H6 110.898
O5 C4 H6 122.910 H7 O3 H8 106.198
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability