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

using model chemistry: PBEPBEultrafine_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 PBEPBEultrafine_cp/3-21G
 hartrees
Energy at 0K-264.385842
Energy at 298.15K-264.379119
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/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
1 A 3406 3375 21.75      
2 A 3296 3266 2.84      
3 A 3205 3175 122.36      
4 A 3043 3015 20.74      
5 A 1685 1669 40.43      
6 A 1637 1622 181.09      
7 A 1318 1306 6.80      
8 A 1296 1285 14.97      
9 A 1121 1111 14.30      
10 A 1048 1038 147.38      
11 A 761 754 459.93      
12 A 709 702 160.12      
13 A 591 586 101.35      
14 A 355 351 90.19      
15 A 342 339 101.50      
16 A 237 235 0.22      
17 A 171 169 29.90      
18 A 155 153 9.10      

Unscaled Zero Point Vibrational Energy (zpe) 12186.7 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 12075.8 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 PBEPBEultrafine/3-21G
ABC
0.63010 0.10971 0.09440

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.649 0.504 -0.143
O2 -2.213 -0.341 -0.096
O3 0.172 1.051 0.010
H4 -2.486 -0.377 0.873
C5 0.547 -0.136 -0.017
O6 1.860 -0.538 0.010
H7 -0.149 -0.986 -0.068
H8 2.442 0.292 0.048

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H11.01681.90781.58382.29093.66362.11464.1005
O21.01682.76401.00732.76914.07962.16224.6999
O31.90782.76403.13831.24572.31822.06382.3934
H41.58381.00733.13833.16984.43382.59115.0406
C52.29092.76911.24573.16981.37331.09981.9434
O63.66364.07962.31824.43381.37332.06071.0137
H72.11462.16222.06382.59111.09982.06072.8915
H84.10054.69992.39345.04061.94341.01372.8915

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 PBEPBEultrafine/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
  1.838 0.632 1.593 2.513
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