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All results from a given calculation for H2OHCOOH (Water formic acid dimer 2)

using model chemistry: PBEPBE_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 PBEPBE_cp/3-21G
 hartrees
Energy at 0K-264.388094
Energy at 298.15K-264.381362
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 PBEPBE/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
18 A 3407 3376 21.79      
17 A 3297 3267 2.86      
16 A 3206 3176 122.79      
15 A 3043 3016 20.68      
14 A 1684 1668 40.34      
13 A 1636 1621 181.03      
12 A 1318 1306 6.63      
11 A 1296 1284 14.90      
10 A 1121 1110 14.29      
9 A 1048 1038 147.96      
8 A 759 752 456.55      
7 A 706 700 160.14      
6 A 591 585 102.72      
5 A 352 349 92.27      
4 A 342 339 100.38      
3 A 237 234 0.23      
2 A 171 169 30.42      
1 A 153 152 9.06      

Unscaled Zero Point Vibrational Energy (zpe) 12182.0 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 12071.2 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 PBEPBE/3-21G
ABC
0.63025 0.10968 0.09438

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.648 0.504 -0.142
O2 -2.213 -0.340 -0.096
O3 0.172 1.051 0.010
H4 -2.486 -0.378 0.873
C5 0.547 -0.136 -0.017
O6 1.861 -0.538 0.010
H7 -0.149 -0.986 -0.070
H8 2.442 0.292 0.050

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H11.01681.90741.58392.29063.66342.11454.1002
O21.01682.76411.00732.76954.08022.16294.7003
O31.90742.76413.13951.24572.31822.06372.3934
H41.58391.00733.13953.17104.43462.59235.0412
C52.29062.76951.24573.17101.37341.09971.9434
O63.66344.08022.31824.43461.37342.06071.0137
H72.11452.16292.06372.59231.09972.06072.8914
H84.10024.70032.39345.04121.94341.01372.8914

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 PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.330      
2 O -0.638      
3 O -0.444      
4 H 0.312      
5 C 0.325      
6 O -0.483      
7 H 0.240      
8 H 0.357      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.840 0.629 1.597 2.517
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> 112.666
(<r2>)1/2 10.614