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_cp/6-311+G(3df,2pd)

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_cp/6-311+G(3df,2pd)
 hartrees
Energy at 0K-265.804337
Energy at 298.15K-265.796525
Nuclear repulsion energy 
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 MP2/6-311+G(3df,2pd)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
18 A 3963 3765 124.02      
17 A 3785 3596 16.52      
16 A 3781 3592 258.98      
15 A 3149 2991 9.37      
14 A 1790 1700 323.12      
13 A 1641 1559 124.13      
12 A 1419 1348 2.94      
11 A 1319 1253 29.25      
10 A 1152 1095 264.37      
9 A 1078 1025 3.37      
8 A 692 657 143.17      
7 A 638 606 50.83      
6 A 496 472 67.18      
5 A 354 336 173.77      
4 A 173 165 6.62      
3 A 81 77 33.41      
2 A 75 72 19.13      
1 A 46 44 104.15      

Unscaled Zero Point Vibrational Energy (zpe) 12816.4 cm-1
Scaled (by 0.95) Zero Point Vibrational Energy (zpe) 12175.6 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 MP2/6-311+G(3df,2pd)
ABC
0.82548 0.09449 0.08478

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+G(3df,2pd)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.750 0.409 0.000
O2 2.370 -0.330 -0.000
O3 -0.188 0.925 -0.000
H4 3.239 0.073 0.000
C5 -0.673 -0.181 0.000
O6 -1.984 -0.434 0.000
H7 -0.096 -1.108 0.000
H8 -2.435 0.423 -0.000

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.96522.00561.52692.49353.82832.38994.1850
O20.96522.84990.95753.04674.35602.58674.8642
O32.00562.84993.53191.20772.25212.03522.3021
H41.52690.95753.53193.92005.24803.53845.6851
C52.49353.04671.20773.92001.33581.09141.8633
O63.82834.35602.25215.24801.33582.00480.9684
H72.38992.58672.03523.53841.09142.00482.7956
H84.18504.86422.30215.68511.86330.96842.7956

picture of Water formic acid dimer 2 state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/6-311+G(3df,2pd) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.223      
2 O -0.349      
3 O -0.763      
4 H 0.123      
5 C 1.016      
6 O -0.529      
7 H 0.095      
8 H 0.185      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.104 0.560 0.000 1.238
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2 An error occurred on the server when processing the URL. Please contact the system administrator.

If you are the system administrator please click here to find out more about this error.