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: HF_cp/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF_cp/aug-cc-pVTZ
 hartrees
Energy at 0K-264.913059
Energy at 298.15K-264.905003
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 HF/aug-cc-pVTZ
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 4206 3829 145.80      
2 A 4080 3715 53.74      
3 A 4075 3710 182.58      
4 A 3264 2972 20.03      
5 A 1965 1789 500.17      
6 A 1757 1600 122.43      
7 A 1538 1400 11.58      
8 A 1426 1299 28.48      
9 A 1266 1153 305.63      
10 A 1202 1095 0.07      
11 A 701 638 64.08      
12 A 698 636 180.92      
13 A 444 404 96.06      
14 A 325 296 150.06      
15 A 137 125 7.58      
16 A 63 57 55.57      
17 A 53 48 86.39      
18 A 47 43 19.47      

Unscaled Zero Point Vibrational Energy (zpe) 13623.6 cm-1
Scaled (by 0.9104) Zero Point Vibrational Energy (zpe) 12403.0 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 HF/aug-cc-pVTZ
ABC
0.94486 0.08584 0.07869

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/aug-cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.867 0.392 -0.000
O2 2.512 -0.298 -0.000
O3 -0.223 0.860 -0.000
H4 3.356 0.117 0.001
C5 -0.745 -0.200 0.000
O6 -2.046 -0.390 0.000
H7 -0.209 -1.141 0.000
H8 -2.489 0.447 -0.000

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.94482.14161.51402.67813.99012.58074.3558
O20.94482.97010.94013.25864.55892.84885.0560
O32.14162.97013.65501.18142.21022.00112.3029
H41.51400.94013.65504.11295.42533.78025.8536
C52.67813.25861.18144.11291.31471.08311.8598
O63.99014.55892.21025.42531.31471.98450.9469
H72.58072.84882.00113.78021.08311.98452.7783
H84.35585.05602.30295.85361.85980.94692.7783

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 HF/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.298      
2 O -0.451      
3 O -0.560      
4 H 0.169      
5 C 0.008      
6 O -0.345      
7 H 0.668      
8 H 0.214      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.267 0.632 0.002 1.416
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
<r2> 132.302
(<r2>)1/2 11.502