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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-190.840897
Energy at 298.15K-190.844197
Nuclear repulsion energy69.308520
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 3889 3692 70.94      
2 A 3743 3553 104.33      
3 A 3080 2924 58.23      
4 A 2984 2833 69.92      
5 A 1856 1762 94.76      
6 A 1742 1653 73.55      
7 A 1553 1474 11.17      
8 A 1291 1225 6.43      
9 A 1221 1159 3.16      
10 A 678 644 236.48      
11 A 312 296 69.53      
12 A 233 221 69.89      
13 A 196 186 39.77      
14 A 181 172 90.72      
15 A 161 153 28.62      

Unscaled Zero Point Vibrational Energy (zpe) 11558.4 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 10972.4 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 B1B95/6-31G*
ABC
1.23003 0.17281 0.15351

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 1.058 -0.495 -0.142
O2 1.811 0.113 -0.093
O3 -0.960 -0.679 0.000
H4 2.206 -0.078 0.765
C5 -1.227 0.498 0.013
H6 -0.438 1.267 -0.000
H7 -2.274 0.848 0.040

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.96942.03081.52162.49652.31583.5978
O20.96942.88300.96333.06432.52924.1533
O32.03082.88303.31171.20712.01462.0159
H41.52160.96333.31173.56143.06344.6325
C52.49653.06431.20713.56141.10201.1047
H62.31582.52922.01463.06341.10201.8842
H73.59784.15332.01594.63251.10471.8842

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 103.860 H1 O3 C5 97.636
O2 H1 O3 145.581 O3 C5 H6 121.424
O3 C5 H7 121.318 H6 C5 H7 117.259
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 -0.831      
3 O -0.355      
4 H 0.394      
5 C 0.051      
6 H 0.173      
7 H 0.148      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.405 0.958 1.453 2.237
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.975 -4.300 3.633
y -4.300 -18.277 -0.004
z 3.633 -0.004 -16.979
Traceless
 xyz
x -0.347 -4.300 3.633
y -4.300 -0.800 -0.004
z 3.633 -0.004 1.146
Polar
3z2-r22.293
x2-y20.302
xy-4.300
xz3.633
yz-0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.491 -0.251 0.189
y -0.251 3.128 -0.044
z 0.189 -0.044 1.776


<r2> (average value of r2) Å2
<r2> 73.603
(<r2>)1/2 8.579