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

using model chemistry: B1B95/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-266.083956
Energy at 298.15K-266.088283
Nuclear repulsion energy118.024029
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 B1B95/6-31G**
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 3868 3693 73.79      
2 A 3730 3561 85.77      
3 A 3708 3540 65.56      
4 A 3156 3013 14.22      
5 A 1849 1765 346.88      
6 A 1735 1657 72.90      
7 A 1425 1361 4.03      
8 A 1346 1286 19.95      
9 A 1184 1130 212.92      
10 A 1090 1041 1.83      
11 A 726 693 160.26      
12 A 664 634 159.04      
13 A 626 598 232.94      
14 A 272 260 99.37      
15 A 222 212 109.82      
16 A 178 170 0.55      
17 A 126 121 15.41      
18 A 104 100 10.38      

Unscaled Zero Point Vibrational Energy (zpe) 13004.6 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 12416.8 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 B1B95/6-31G**
ABC
0.74151 0.09690 0.08637

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.763 0.444 -0.151
O2 -2.381 -0.302 -0.090
O3 0.219 0.967 0.003
H4 -2.762 -0.212 0.792
C5 0.644 -0.164 -0.005
O6 1.938 -0.482 0.011
H7 0.014 -1.060 -0.024
H8 2.435 0.355 0.023

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.97062.05601.52202.48643.81812.33084.2024
O20.97062.89500.96493.02874.32332.51204.8618
O32.05602.89503.30191.20852.24822.03802.2987
H41.52200.96493.30193.49784.77173.01465.2840
C52.48643.02871.20853.49781.33261.09541.8654
O63.81814.32332.24824.77171.33262.00930.9743
H72.33082.51202.03803.01461.09542.00932.8052
H84.20244.86182.29875.28401.86540.97432.8052

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 103.698 H1 O3 C5 95.714
O2 H1 O3 143.591 O3 C5 O6 124.359
O3 C5 H7 124.321 C5 O6 H8 106.890
O6 C5 H7 111.321
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.420      
2 O -0.822      
3 O -0.442      
4 H 0.392      
5 C 0.362      
6 O -0.526      
7 H 0.193      
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
  1.867 0.455 1.436 2.399
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.201 0.759 -4.428
y 0.759 -25.214 -0.488
z -4.428 -0.488 -22.064
Traceless
 xyz
x 2.438 0.759 -4.428
y 0.759 -3.582 -0.488
z -4.428 -0.488 1.143
Polar
3z2-r22.287
x2-y24.013
xy0.759
xz-4.428
yz-0.488


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.405 -0.071 -0.200
y -0.071 3.431 0.017
z -0.200 0.017 2.107


<r2> (average value of r2) Å2
<r2> 121.621
(<r2>)1/2 11.028