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

using model chemistry: HF_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 HF_cp/6-31G*
 hartrees
Energy at 0K-264.786809
Energy at 298.15K-264.779803
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/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 4157 3735 128.30      
2 A 4024 3616 104.51      
3 A 3824 3436 487.21      
4 A 3315 2978 76.45      
5 A 1997 1794 465.42      
6 A 1831 1645 143.35      
7 A 1574 1414 5.03      
8 A 1526 1371 28.80      
9 A 1342 1206 281.24      
10 A 1204 1082 0.73      
11 A 937 842 239.51      
12 A 748 672 66.83      
13 A 578 520 244.33      
14 A 352 316 115.18      
15 A 247 222 77.83      
16 A 218 196 29.89      
17 A 179 161 52.74      
18 A 166 149 7.98      

Unscaled Zero Point Vibrational Energy (zpe) 14108.9 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 12676.8 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/6-31G*
ABC
0.40446 0.15628 0.11356

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.351 0.972 -0.029
O2 -0.603 1.112 0.000
O3 1.964 0.004 -0.083
C4 -1.222 -0.040 0.014
O5 -0.700 -1.111 0.002
H6 -2.297 0.095 0.041
H7 2.540 -0.071 0.666
H8 1.454 -0.801 -0.113

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H10.96451.88171.87162.33362.79082.52222.0900
O20.96452.79671.30862.22511.97683.42342.8113
O31.88172.79673.18782.88924.26370.94800.9532
C41.87161.30863.18781.19091.08373.81852.7853
O52.33362.22512.88921.19092.00113.46752.1798
H62.79081.97684.26371.08372.00114.88023.8599
H72.52223.42340.94803.81853.46754.88021.5226
H82.09002.81130.95322.78532.17983.85991.5226

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 HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.522      
2 O -0.696      
3 O -0.911      
4 C 0.538      
5 O -0.560      
6 H 0.178      
7 H 0.449      
8 H 0.480      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.452 0.112 1.383 1.460
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