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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-264.597893
Energy at 298.15K-264.602614
Nuclear repulsion energy119.175828
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 B1B95/3-21G
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 3597 3441 27.56      
2 A 3495 3344 19.56      
3 A 3427 3279 95.77      
4 A 3175 3038 8.22      
5 A 1726 1652 198.70      
6 A 1711 1637 78.38      
7 A 1370 1311 10.83      
8 A 1348 1290 11.15      
9 A 1152 1102 9.56      
10 A 1101 1054 205.99      
11 A 710 679 197.54      
12 A 652 623 335.96      
13 A 614 587 245.00      
14 A 343 328 106.77      
15 A 303 290 109.05      
16 A 227 217 0.48      
17 A 173 165 26.47      
18 A 148 142 12.56      

Unscaled Zero Point Vibrational Energy (zpe) 12635.4 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 12088.3 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 B1B95/3-21G
ABC
0.66182 0.10922 0.09463

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.681 0.507 -0.151
O2 -2.214 -0.333 -0.092
O3 0.177 1.027 0.009
H4 -2.574 -0.345 0.830
C5 0.557 -0.142 -0.015
O6 1.860 -0.519 0.011
H7 -0.114 -0.995 -0.061
H8 2.444 0.287 0.045

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.99681.93551.57662.33403.69042.17254.1349
O20.99682.75220.99022.77884.07992.20224.7007
O31.93552.75223.18151.22872.28562.04342.3846
H41.57660.99023.18153.24954.51282.69615.1181
C52.33402.77881.22873.24951.35711.08651.9356
O63.69044.07992.28564.51281.35712.03190.9960
H72.17252.20222.04342.69611.08652.03192.8629
H84.13494.70072.38465.11811.93560.99602.8629

picture of Water formic acid dimer 2 state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 105.021 H1 O3 C5 92.312
O2 H1 O3 137.283 O3 C5 O6 124.162
O3 C5 H7 123.804 C5 O6 H8 109.731
O6 C5 H7 112.034
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.355      
2 O -0.683      
3 O -0.487      
4 H 0.330      
5 C 0.394      
6 O -0.545      
7 H 0.258      
8 H 0.378      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.614 0.678 1.603 2.374
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.361 1.209 -4.308
y 1.209 -25.741 -0.786
z -4.308 -0.786 -21.787
Traceless
 xyz
x 3.403 1.209 -4.308
y 1.209 -4.667 -0.786
z -4.308 -0.786 1.264
Polar
3z2-r22.529
x2-y25.380
xy1.209
xz-4.308
yz-0.786


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.061 -0.007 -0.284
y -0.007 2.975 -0.020
z -0.284 -0.020 1.590


<r2> (average value of r2) Å2
<r2> 112.414
(<r2>)1/2 10.603