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

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-190.857752
Energy at 298.15K-190.861054
Nuclear repulsion energy69.305108
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 3935 3757 63.38      
2 A 3789 3617 101.83      
3 A 3049 2911 57.20      
4 A 2950 2817 70.98      
5 A 1842 1758 89.92      
6 A 1685 1608 66.40      
7 A 1534 1465 12.65      
8 A 1278 1220 5.75      
9 A 1217 1162 3.18      
10 A 672 642 231.71      
11 A 307 293 58.65      
12 A 234 223 70.03      
13 A 194 185 55.54      
14 A 181 173 77.26      
15 A 164 157 20.34      

Unscaled Zero Point Vibrational Energy (zpe) 11514.3 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 10993.9 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
1.22095 0.17326 0.15377

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 1.066 -0.509 -0.142
O2 1.809 0.108 -0.094
O3 -0.968 -0.680 0.002
H4 2.187 -0.055 0.774
C5 -1.218 0.502 0.012
H6 -0.415 1.259 -0.003
H7 -2.261 0.869 0.036

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.96722.04561.51802.50282.31033.6059
O20.96722.88790.96103.05492.50594.1432
O32.04562.88793.30761.20882.01592.0189
H41.51800.96103.30763.53413.01694.6034
C52.50283.05491.20883.53411.10341.1061
H62.31032.50592.01593.01691.10341.8874
H73.60594.14322.01894.60341.10611.8874

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 103.853 H1 O3 C5 97.185
O2 H1 O3 144.456 O3 C5 H6 121.290
O3 C5 H7 121.361 H6 C5 H7 117.349
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 0.326      
2 O -0.649      
3 O -0.365      
4 H 0.308      
5 C 0.145      
6 H 0.129      
7 H 0.106      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.335 1.006 1.429 2.199
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.076 -4.112 3.560
y -4.112 -18.248 0.049
z 3.560 0.049 -16.919
Traceless
 xyz
x -0.492 -4.112 3.560
y -4.112 -0.750 0.049
z 3.560 0.049 1.242
Polar
3z2-r22.485
x2-y20.172
xy-4.112
xz3.560
yz0.049


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.548 -0.251 0.189
y -0.251 3.193 -0.037
z 0.189 -0.037 1.841


<r2> (average value of r2) Å2
<r2> 73.472
(<r2>)1/2 8.572