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

using model chemistry: HF_cp/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-264.918554
Energy at 298.15K-264.911216
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/aug-cc-pVTZ
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 4203 3826 142.45      
2 A 4072 3707 86.63      
3 A 3900 3550 450.37      
4 A 3238 2948 59.74      
5 A 1957 1781 470.90      
6 A 1743 1587 150.36      
7 A 1547 1409 4.60      
8 A 1490 1357 27.50      
9 A 1312 1195 280.34      
10 A 1201 1093 0.01      
11 A 863 785 170.30      
12 A 738 671 47.46      
13 A 479 436 123.87      
14 A 328 298 84.74      
15 A 189 172 61.24      
16 A 176 160 13.63      
17 A 156 142 102.77      
18 A 128 117 17.31      

Unscaled Zero Point Vibrational Energy (zpe) 13859.4 cm-1
Scaled (by 0.9104) Zero Point Vibrational Energy (zpe) 12617.6 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/aug-cc-pVTZ
ABC
0.40991 0.15011 0.11025

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/aug-cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.321 0.976 0.005
O2 -0.625 1.108 0.007
O3 1.990 0.010 -0.069
C4 -1.243 -0.044 0.005
O5 -0.721 -1.107 0.005
H6 -2.319 0.090 0.004
H7 2.772 -0.069 0.447
H8 1.529 -0.814 -0.020

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H10.95531.93001.86782.32922.78572.70102.1594
O20.95532.83731.30732.21661.97693.62212.8863
O31.93002.83733.23472.93304.31100.94050.9457
C41.86781.30733.23471.18411.08464.03972.8767
O52.32922.21662.93301.18411.99673.67062.2685
H62.78571.97694.31101.08461.99675.11333.9527
H72.70103.62210.94054.03973.67065.11331.5230
H82.15942.88630.94572.87672.26853.95271.5230

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/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.329      
2 O -0.353      
3 O -0.442      
4 C -0.055      
5 O -0.584      
6 H 0.654      
7 H 0.177      
8 H 0.273      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.773 0.286 0.972 1.274
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