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

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-265.588281
Energy at 298.15K-265.593262
HF Energy-264.857818
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy124.160869
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 3961 3764 84.19      
2 A 3783 3595 82.34      
3 A 3424 3254 539.33      
4 A 3128 2973 84.47      
5 A 1810 1720 237.55      
6 A 1748 1661 238.07      
7 A 1511 1436 1.97      
8 A 1422 1351 9.79      
9 A 1250 1188 236.92      
10 A 1095 1041 35.24      
11 A 984 935 173.20      
12 A 717 681 69.33      
13 A 597 567 212.07      
14 A 386 367 129.15      
15 A 276 262 36.30      
16 A 255 242 85.99      
17 A 197 187 62.97      
18 A 181 172 6.91      

Unscaled Zero Point Vibrational Energy (zpe) 13363.0 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 12698.8 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
0.39166 0.16621 0.11750

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 0.405 0.967 0.033
O2 -0.566 1.134 0.011
O3 1.887 0.016 -0.071
C4 -1.192 -0.035 -0.003
O5 -0.675 -1.135 0.025
H6 -2.277 0.115 -0.042
H7 2.484 -0.230 0.636
H8 1.375 -0.761 -0.329

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H10.98531.76421.88562.36362.81492.47382.0152
O20.98532.69691.32602.27191.99213.39892.7343
O31.76422.69693.08022.81024.16510.95740.9657
C41.88561.32603.08021.21641.09583.73612.6880
O52.36362.27192.81021.21642.03343.34182.1137
H62.81491.99214.16511.09582.03344.82103.7668
H72.47383.39890.95743.73613.34184.82101.5626
H82.01522.73430.96572.68802.11373.76681.5626

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 108.444 H1 O3 H7 128.229
H1 O3 H8 90.268 O2 H1 O3 156.594
O2 C4 O5 126.611 O2 C4 H6 110.330
O5 C4 H6 123.059 H7 O3 H8 108.684
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability