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: HF/TZVP

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/TZVP
 hartrees
Energy at 0K-264.778751
Energy at 298.15K-264.782496
HF Energy-264.778751
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy117.317047
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/TZVP
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 4182 3800 93.76      
2 A 4067 3695 26.42      
3 A 4040 3670 113.57      
4 A 3360 3053 17.98      
5 A 2033 1847 449.62      
6 A 1830 1663 111.94      
7 A 1551 1409 16.87      
8 A 1425 1294 11.71      
9 A 1262 1147 320.40      
10 A 1203 1093 1.20      
11 A 710 645 211.53      
12 A 693 629 63.52      
13 A 378 344 234.86      
14 A 216 197 144.87      
15 A 134 122 92.56      
16 A 119 108 6.91      
17 A 88 80 32.30      
18 A 64 58 9.61      

Unscaled Zero Point Vibrational Energy (zpe) 13677.3 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 12427.2 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/TZVP
ABC
0.67161 0.09258 0.08178

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/TZVP

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.968 0.519 -0.119
O2 2.430 -0.309 -0.083
O3 -0.308 0.936 0.008
H4 3.030 -0.240 0.646
H5 -1.022 1.568 -0.005
C6 -0.830 -0.289 0.007
O7 -1.990 -0.511 0.003
H8 -0.045 -1.033 0.012

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 C6 O7 H8
H10.94872.31791.51263.17092.91544.09242.5451
O20.94873.00890.94743.92963.26074.42542.5796
O32.31793.00893.59640.95351.33142.21861.9857
H41.51260.94743.59644.48443.91285.06873.2381
H53.17093.92960.95354.48441.86732.29352.7780
C62.91543.26071.33143.91281.86731.18151.0810
O74.09244.42542.21865.06872.29351.18152.0143
H82.54512.57961.98573.23812.77801.08102.0143

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 105.834 H1 O3 H5 148.593
H1 O3 C6 102.676 O2 H1 O3 129.219
O3 C6 O7 123.872 O3 C6 H8 110.364
H5 O3 C6 108.483 O7 C6 H8 125.764
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.459      
2 O -0.891      
3 O -0.692      
4 H 0.436      
5 H 0.467      
6 C 0.517      
7 O -0.513      
8 H 0.217      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.607 2.449 1.313 3.210
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.154 -1.613 4.494
y -1.613 -20.694 -0.587
z 4.494 -0.587 -22.581
Traceless
 xyz
x -5.516 -1.613 4.494
y -1.613 4.173 -0.587
z 4.494 -0.587 1.343
Polar
3z2-r22.686
x2-y2-6.460
xy-1.613
xz4.494
yz-0.587


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.781 0.004 0.243
y 0.004 3.093 -0.013
z 0.243 -0.013 1.889


<r2> (average value of r2) Å2
<r2> 127.270
(<r2>)1/2 11.281