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 1)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-266.026630
Energy at 298.15K-266.030022
Counterpoise corrected energy-266.026526
CP Energy at 298.15K-266.029917
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy115.304021
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 PBEPBEultrafine/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 3785 3742 91.48      
2 A 3665 3624 47.73      
3 A 3595 3555 49.14      
4 A 2986 2952 13.78      
5 A 1761 1742 326.02      
6 A 1591 1574 83.56      
7 A 1351 1336 6.09      
8 A 1237 1223 2.01      
9 A 1060 1048 247.92      
10 A 1009 998 4.53      
11 A 656 649 123.53      
12 A 602 596 32.23      
13 A 346 343 95.34      
14 A 233 231 99.48      
15 A 119 117 6.21      
16 A 78 77 86.05      
17 A 50 49 1.17      
18 A 47 47 40.39      

Unscaled Zero Point Vibrational Energy (zpe) 12086.0 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 11950.6 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 PBEPBEultrafine/aug-cc-pVTZ
ABC
0.71078 0.08906 0.07933

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.897 0.468 -0.008
O2 2.447 -0.332 -0.070
O3 -0.246 0.911 0.010
H4 3.274 -0.101 0.380
H5 -0.950 1.588 -0.063
C6 -0.869 -0.304 0.035
O7 -2.064 -0.458 -0.018
H8 -0.106 -1.099 0.109

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 C6 O7 H8
H10.97312.18801.54023.06002.87104.06722.5453
O20.97312.96710.96973.90263.31734.51292.6714
O32.18802.96713.68140.98001.36492.27562.0175
H41.54020.96973.68144.57144.16205.36483.5345
H53.06003.90260.98004.57141.89602.32972.8224
C62.87103.31731.36494.16201.89601.20641.1049
O74.06724.51292.27565.36482.32971.20642.0647
H82.54532.67142.01753.53452.82241.10492.0647

picture of Water formic acid dimer 1 state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 104.899 H1 O3 H5 147.484
H1 O3 C6 105.464 O2 H1 O3 136.127
O3 C6 O7 124.386 O3 C6 H8 109.093
H5 O3 C6 106.767 O7 C6 H8 126.520
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.224      
2 O -0.360      
3 O -0.185      
4 H 0.146      
5 H 0.137      
6 C 0.044      
7 O -0.459      
8 H 0.453      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.451 2.254 0.786 2.793
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.454 -0.826 2.794
y -0.826 -21.530 -0.332
z 2.794 -0.332 -24.724
Traceless
 xyz
x -3.327 -0.826 2.794
y -0.826 4.059 -0.332
z 2.794 -0.332 -0.732
Polar
3z2-r2-1.464
x2-y2-4.924
xy-0.826
xz2.794
yz-0.332


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.338 0.273 0.093
y 0.273 5.283 -0.057
z 0.093 -0.057 3.900


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000