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

using model chemistry: B3LYP_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 B3LYP_cp/6-31G*
 hartrees
Energy at 0K-266.181962
Energy at 298.15K-266.175550
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 B3LYP/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 3794 3644 62.77      
2 A 3568 3426 259.34      
3 A 3192 3065 562.47      
4 A 3087 2964 146.13      
5 A 1803 1731 301.74      
6 A 1722 1654 112.78      
7 A 1505 1445 1.75      
8 A 1413 1357 14.24      
9 A 1249 1200 193.68      
10 A 1080 1037 29.52      
11 A 997 957 120.17      
12 A 760 730 287.49      
13 A 695 668 52.13      
14 A 405 389 92.60      
15 A 335 321 75.54      
16 A 268 257 43.78      
17 A 218 209 17.00      
18 A 210 202 12.71      

Unscaled Zero Point Vibrational Energy (zpe) 13150.1 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 12628.0 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 B3LYP/6-31G*
ABC
0.38877 0.17176 0.12038

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.435 0.949 -0.040
O2 -0.550 1.136 -0.002
O3 1.879 -0.011 -0.093
C4 -1.182 -0.029 0.017
O5 -0.659 -1.131 -0.001
H6 -2.271 0.115 0.054
H7 2.312 -0.067 0.773
H8 1.268 -0.780 -0.116

Atom - Atom Distances (Å)
  H1 O2 O3 C4 O5 H6 H7 H8
H11.00341.73521.89052.35032.83322.28441.9209
O21.00342.68811.32552.26952.00193.20042.6440
O31.73522.68813.06292.77534.15460.97000.9822
C41.89051.32553.06291.21961.09933.57512.5659
O52.35032.26952.77531.21962.03803.24941.9620
H62.83322.00194.15461.09932.03804.64293.6545
H72.28443.20040.97003.57513.24944.64291.5459
H81.92092.64400.98222.56591.96203.65451.5459

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 B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.439      
2 O -0.545      
3 O -0.791      
4 C 0.374      
5 O -0.452      
6 H 0.149      
7 H 0.404      
8 H 0.423      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.363 0.170 1.478 1.532
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> 91.971
(<r2>)1/2 9.590