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

using model chemistry: PBEPBE_cp/6-31G*

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/6-31G*
 hartrees
Energy at 0K-265.897143
Energy at 298.15K-265.890940
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/6-31G*
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 3684 3632 46.08      
2 A 3357 3309 386.77      
3 A 3005 2962 26.99      
4 A 2882 2841 772.39      
5 A 1743 1718 241.28      
6 A 1688 1664 116.45      
7 A 1487 1465 1.24      
8 A 1362 1342 10.99      
9 A 1221 1203 159.12      
10 A 1076 1060 94.25      
11 A 991 977 26.77      
12 A 811 800 326.00      
13 A 692 682 15.90      
14 A 434 427 87.38      
15 A 362 357 69.94      
16 A 289 285 51.06      
17 A 234 231 9.09      
18 A 222 219 12.22      

Unscaled Zero Point Vibrational Energy (zpe) 12769.7 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 12587.1 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/6-31G*
ABC
0.38226 0.17742 0.12257

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.468 0.934 -0.044
O2 -0.534 1.147 -0.004
O3 1.850 -0.017 -0.095
C4 -1.168 -0.024 0.017
O5 -0.645 -1.140 -0.002
H6 -2.267 0.121 0.058
H7 2.233 -0.060 0.804
H8 1.205 -0.777 -0.115

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H11.02531.67781.89682.35382.85472.19561.8634
O21.02532.65431.33142.28922.01423.12492.5951
O31.67782.65433.02032.73814.12190.97870.9972
C41.89681.33143.02031.23261.10883.49132.4930
O52.35382.28922.73811.23262.05503.17841.8887
H62.85472.01424.12191.10882.05504.56493.5898
H72.19563.12490.97873.49133.17844.56491.5546
H81.86342.59510.99722.49301.88873.58981.5546

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 PBEPBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.417      
2 O -0.503      
3 O -0.763      
4 C 0.310      
5 O -0.420      
6 H 0.154      
7 H 0.398      
8 H 0.408      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.371 0.200 1.492 1.551
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