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All results from a given calculation for HCOOHH2O (Formic acid water dimer)

using model chemistry: PBEPBEultrafine_cp/6-311+G(3df,2pd)

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_cp/6-311+G(3df,2pd)
 hartrees
Energy at 0K-266.032510
Energy at 298.15K-266.025983
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 PBEPBEultrafine/6-311+G(3df,2pd)
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 3777 3739 69.46      
2 A 3461 3426 383.69      
3 A 3076 3045 639.46      
4 A 2967 2937 136.83      
5 A 1713 1696 286.85      
6 A 1591 1575 111.40      
7 A 1429 1415 3.40      
8 A 1337 1324 11.09      
9 A 1186 1174 187.86      
10 A 1031 1021 33.84      
11 A 959 949 72.51      
12 A 706 699 139.39      
13 A 660 653 83.56      
14 A 387 383 63.22      
15 A 318 315 93.03      
16 A 234 232 43.10      
17 A 203 201 26.29      
18 A 187 185 8.03      

Unscaled Zero Point Vibrational Energy (zpe) 12610.5 cm-1
Scaled (by 0.99) Zero Point Vibrational Energy (zpe) 12484.3 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/6-311+G(3df,2pd)
ABC
0.38857 0.17165 0.12004

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-311+G(3df,2pd)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.435 0.946 -0.007
O2 -0.554 1.139 0.005
O3 1.869 -0.008 -0.097
C4 -1.186 -0.032 0.010
O5 -0.657 -1.133 0.002
H6 -2.283 0.110 0.024
H7 2.452 -0.080 0.674
H8 1.249 -0.773 -0.038

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H11.00831.72471.89322.34802.84362.36321.9016
O21.00832.68331.33052.27442.01163.31282.6283
O31.72472.68333.05702.76644.15510.96930.9862
C41.89321.33053.05701.22181.10593.69882.5453
O52.34802.27442.76641.22182.04693.35051.9394
H62.84362.01164.15511.10592.04694.78323.6405
H72.36323.31280.96933.69883.35054.78321.5607
H81.90162.62830.98622.54531.93943.64051.5607

picture of Formic acid water dimer state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-311+G(3df,2pd) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.331      
2 O -0.451      
3 O -0.413      
4 C 0.689      
5 O -0.615      
6 H 0.051      
7 H 0.122      
8 H 0.286      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.484 0.318 1.285 1.410
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> 0.000
(<r2>)1/2 0.000