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

using model chemistry: PBEPBE/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 PBEPBE/6-31G*
 hartrees
Energy at 0K-190.701776
Energy at 298.15K-190.705159
Counterpoise corrected energy-190.697173
CP Energy at 298.15K-190.700031
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy69.065198
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/6-31G*
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 3708 3655 44.84      
2 A 3528 3478 145.46      
3 A 2945 2902 64.53      
4 A 2862 2821 89.32      
5 A 1761 1736 77.46      
6 A 1703 1679 60.36      
7 A 1491 1470 13.24      
8 A 1240 1222 3.00      
9 A 1169 1152 3.76      
10 A 640 631 241.09      
11 A 339 334 58.54      
12 A 247 244 63.03      
13 A 210 207 95.94      
14 A 204 201 12.89      
15 A 166 164 24.95      

Unscaled Zero Point Vibrational Energy (zpe) 11106.2 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 10947.4 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 PBEPBE/6-31G*
ABC
1.19706 0.17565 0.15545

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.022 -0.497 -0.131
O2 1.802 0.105 -0.099
O3 -0.947 -0.687 0.003
H4 2.130 -0.018 0.813
C5 -1.217 0.505 0.010
H6 -0.415 1.280 -0.008
H7 -2.276 0.862 0.035

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.98521.98301.53232.45702.28863.5711
O20.98522.86220.97673.04652.51024.1493
O31.98302.86223.25151.22232.03772.0414
H41.53230.97673.25153.48132.97244.5599
C52.45703.04651.22233.48131.11521.1181
H62.28862.51022.03772.97241.11521.9078
H73.57114.14932.04144.55991.11811.9078

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 102.714 H1 O3 C5 97.235
O2 H1 O3 147.337 O3 C5 H6 121.262
O3 C5 H7 121.380 H6 C5 H7 117.358
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.394      
2 O -0.789      
3 O -0.313      
4 H 0.374      
5 C 0.027      
6 H 0.165      
7 H 0.143      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.546 0.979 1.480 2.353
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.725 -3.650 3.579
y -3.650 -18.461 0.090
z 3.579 0.090 -16.992
Traceless
 xyz
x -0.998 -3.650 3.579
y -3.650 -0.603 0.090
z 3.579 0.090 1.601
Polar
3z2-r23.203
x2-y2-0.264
xy-3.650
xz3.579
yz0.090


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.875 -0.306 0.181
y -0.306 3.241 -0.035
z 0.181 -0.035 1.886


<r2> (average value of r2) Å2
<r2> 73.016
(<r2>)1/2 8.545