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All results from a given calculation for H2OH2CO (water formaldehyde dimer)

using model chemistry: PBEPBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-190.735859
Energy at 298.15K-190.738714
Counterpoise corrected energy-190.735243
CP Energy at 298.15K-190.738050
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy68.346422
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 PBEPBE/6-31+G**
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 3808 3764 86.37      
2 A 3568 3528 279.20      
3 A 2941 2907 72.60      
4 A 2861 2829 67.60      
5 A 1746 1726 90.51      
6 A 1588 1569 99.83      
7 A 1483 1466 16.24      
8 A 1228 1214 4.97      
9 A 1155 1142 7.63      
10 A 529 523 117.62      
11 A 374 370 143.88      
12 A 194 192 30.24      
13 A 180 178 0.03      
14 A 80 79 48.11      
15 A 60 60 171.97      

Unscaled Zero Point Vibrational Energy (zpe) 10897.4 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 10773.2 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 PBEPBE/6-31+G**
ABC
1.30412 0.16584 0.14716

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.046 -0.415 -0.006
O2 1.822 0.187 -0.013
O3 -0.893 -0.682 -0.003
H4 2.600 -0.387 0.087
C5 -1.332 0.460 0.005
H6 -0.655 1.345 0.018
H7 -2.431 0.655 -0.001

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.98241.95671.55722.53392.44743.6377
O20.98242.85070.97143.16672.73484.2794
O31.95672.85073.50611.22372.04122.0381
H41.55720.97143.50614.02333.68755.1386
C52.53393.16671.22374.02331.11501.1160
H62.44742.73482.04123.68751.11501.9062
H73.63774.27942.03815.13861.11601.9062

picture of water formaldehyde dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 105.691 H1 O3 C5 103.215
O2 H1 O3 150.091 O3 C5 H6 121.507
O3 C5 H7 121.101 H6 C5 H7 117.392
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.374      
2 O -0.755      
3 O -0.302      
4 H 0.356      
5 C 0.022      
6 H 0.165      
7 H 0.139      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.354 0.274 0.210 1.397
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.580 -6.561 0.556
y -6.561 -19.228 -0.101
z 0.556 -0.101 -19.794
Traceless
 xyz
x 4.931 -6.561 0.556
y -6.561 -2.041 -0.101
z 0.556 -0.101 -2.890
Polar
3z2-r2-5.780
x2-y24.648
xy-6.561
xz0.556
yz-0.101


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.462 -0.396 0.011
y -0.396 3.948 0.019
z 0.011 0.019 2.507


<r2> (average value of r2) Å2
<r2> 76.787
(<r2>)1/2 8.763