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All results from a given calculation for H2OHCOOH (Water formic acid dimer 1)

using model chemistry: HF_cp/3-21G

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/3-21G
 hartrees
Energy at 0K-263.288361
Energy at 298.15K-263.280976
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/3-21G
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 3948 3575 58.46      
2 A 3861 3497 71.42      
3 A 3818 3458 30.14      
4 A 3382 3063 4.30      
5 A 1941 1757 292.17      
6 A 1810 1639 100.53      
7 A 1535 1390 25.63      
8 A 1384 1253 29.17      
9 A 1238 1121 0.58      
10 A 1159 1049 329.95      
11 A 674 610 312.36      
12 A 670 607 71.61      
13 A 548 496 345.25      
14 A 322 291 146.11      
15 A 213 193 109.60      
16 A 189 171 4.43      
17 A 151 137 36.96      
18 A 123 111 17.51      

Unscaled Zero Point Vibrational Energy (zpe) 13481.7 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 12209.0 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/3-21G
ABC
0.60530 0.10801 0.09228

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.758 0.511 -0.151
O2 2.222 -0.337 -0.087
O3 -0.238 0.988 0.010
H4 2.773 -0.326 0.706
H5 -0.939 1.658 0.008
C6 -0.729 -0.288 -0.000
O7 -1.898 -0.544 0.008
H8 0.097 -0.969 -0.017

Atom - Atom Distances (Å)
  H1 O2 O3 H4 H5 C6 O7 H8
H10.96802.05951.57042.93592.61723.80872.2288
O20.96802.79610.96593.73912.95284.12602.2181
O32.05952.79613.35910.96951.36772.25871.9858
H41.57040.96593.35914.26723.57324.72782.8456
H52.93593.73910.96954.26721.95772.40192.8241
C62.61722.95281.36773.57321.95771.19621.0706
O73.80874.12602.25874.72782.40191.19622.0396
H82.22882.21811.98582.84562.82411.07062.0396

picture of Water formic acid dimer 1 state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.401      
2 O -0.760      
3 O -0.726      
4 H 0.370      
5 H 0.416      
6 C 0.593      
7 O -0.578      
8 H 0.285      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.335 2.511 1.482 3.207
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> 114.452
(<r2>)1/2 10.698