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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: BLYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at BLYP/STO-3G
 hartrees
Energy at 0K-112.918347
Energy at 298.15K-112.919736
HF Energy-112.918347
Nuclear repulsion energy29.951164
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 BLYP/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2992 2768 8.02 52.61 0.16 0.28
2 A1 1784 1650 6.63 3.73 0.32 0.49
3 A1 1565 1448 2.08 15.39 0.67 0.80
4 B1 1081 1000 7.23 0.33 0.75 0.86
5 B2 3089 2858 73.76 33.67 0.75 0.86
6 B2 1230 1138 12.94 4.33 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5870.6 cm-1
Scaled (by 0.9252) Zero Point Vibrational Energy (zpe) 5431.5 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 BLYP/STO-3G
ABC
9.29866 1.17153 1.04045

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.711
C2 0.000 0.000 -0.554
H3 0.000 0.948 -1.181
H4 0.000 -0.948 -1.181

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.26462.11622.1162
C21.26461.13701.1370
H32.11621.13701.8968
H42.11621.13701.8968

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 123.478 O1 C2 H4 123.478
H3 C2 H4 113.043
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.137      
2 C 0.016      
3 H 0.060      
4 H 0.060      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.247 1.247
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -10.485 0.000 0.000
y 0.000 -10.558 0.000
z 0.000 0.000 -11.033
Traceless
 xyz
x 0.311 0.000 0.000
y 0.000 0.201 0.000
z 0.000 0.000 -0.512
Polar
3z2-r2-1.024
x2-y20.073
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.406 0.000 0.000
y 0.000 0.979 0.000
z 0.000 0.000 1.595


<r2> (average value of r2) Å2
<r2> 17.148
(<r2>)1/2 4.141