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

using model chemistry: HF_cp/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF_cp/3-21G
 hartrees
Energy at 0K-188.812077
Energy at 298.15K-188.805547
Nuclear repulsion energy 
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 HF/3-21G
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 3933 3562 63.92      
2 A 3799 3440 72.74      
3 A 3311 2998 34.88      
4 A 3196 2894 42.77      
5 A 1881 1703 59.48      
6 A 1826 1653 104.64      
7 A 1670 1512 28.15      
8 A 1374 1244 7.77      
9 A 1362 1233 6.42      
10 A 649 587 375.81      
11 A 380 344 114.31      
12 A 304 275 53.84      
13 A 230 208 45.91      
14 A 205 186 173.20      
15 A 196 178 28.91      

Unscaled Zero Point Vibrational Energy (zpe) 12156.8 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 11009.2 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 HF/3-21G
ABC
1.22229 0.18595 0.16331

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.024 -0.542 -0.146
O2 1.733 0.117 -0.087
O3 -0.932 -0.683 0.003
H4 2.260 -0.074 0.699
C5 -1.182 0.505 0.014
H6 -0.397 1.241 -0.008
H7 -2.200 0.871 0.045

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.96911.96651.56842.44712.28423.5249
O20.96912.78310.96572.94232.40944.0060
O31.96652.78313.32291.21351.99712.0060
H41.56840.96573.32293.55723.04774.6055
C52.44712.94231.21353.55721.07721.0818
H62.28422.40941.99713.04771.07721.8412
H73.52494.00602.00604.60551.08181.8412

picture of water formaldehyde dimer state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.400      
2 O -0.777      
3 O -0.517      
4 H 0.361      
5 C 0.119      
6 H 0.225      
7 H 0.190      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.177 1.098 1.532 2.222
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 69.925
(<r2>)1/2 8.362