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

using model chemistry: MP2_cp_opt/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 MP2_cp_opt/6-31G*
 hartrees
Energy at 0K-265.445426
Energy at 298.15K-265.449180
Nuclear repulsion energy69.729700
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 MP2_cp_opt/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
18 A 3897 3675 91.06      
17 A 3743 3530 77.40      
16 A 3683 3473 77.04      
15 A 3192 3010 17.19      
14 A 1826 1722 234.83      
13 A 1752 1652 175.01      
12 A 1446 1364 3.75      
11 A 1349 1272 15.44      
10 A 1169 1102 259.79      
9 A 1082 1020 3.26      
8 A 721 680 182.26      
7 A 634 598 56.42      
6 A 448 422 134.23      
5 A 335 316 196.65      
4 A 152 144 3.15      
3 A 75 71 54.89      
2 A 56 53 21.14      
1 A 55 52 103.97      

Unscaled Zero Point Vibrational Energy (zpe) 12807.4 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 12077.4 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 MP2_cp_opt/6-31G*
ABC
0.80962 0.08863 0.07988

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2_cp_opt/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.823 0.404 -0.000
O2 -2.463 -0.329 0.000
O3 0.222 0.933 -0.000
H4 -3.328 0.104 0.000
C5 0.707 -0.184 -0.000
O6 2.028 -0.443 0.000
H7 0.134 -1.118 -0.000
H8 2.479 0.428 0.000

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.97272.11221.53492.59713.94302.47904.3017
O20.97272.96650.96763.17284.49242.71424.9991
O32.11222.96653.64571.21822.27072.05272.3127
H41.53490.96763.64574.04535.38423.67175.8160
C52.59713.17281.21824.04531.34641.09481.8747
O63.94304.49242.27075.38421.34642.01040.9804
H72.47902.71422.05273.67171.09482.01042.8080
H84.30174.99912.31275.81601.87470.98042.8080

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 104.569 H1 O3 C5 98.938
O2 H1 O3 145.650 O3 C5 O6 124.521
O3 C5 H7 125.022 C5 O6 H8 106.293
O6 C5 H7 110.457
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2_cp_opt/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.000      
2 O 0.000      
3 O -0.536      
4 H 0.000      
5 C 0.542      
6 O -0.671      
7 H 0.195      
8 H 0.470      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.027 0.891 0.000 1.360
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.759 -1.210 -0.000
y -1.210 -25.308 0.001
z -0.000 0.001 -23.965
Traceless
 xyz
x 7.878 -1.210 -0.000
y -1.210 -4.946 0.001
z -0.000 0.001 -2.931
Polar
3z2-r2-5.863
x2-y28.549
xy-1.210
xz-0.000
yz0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.948 -0.218 0.014
y -0.218 2.962 0.005
z 0.014 0.005 1.294


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000