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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-114.466158
Energy at 298.15K-114.467604
HF Energy-114.466158
Nuclear repulsion energy31.323374
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 mPW1PW91/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 2950 2798 56.45 154.03 0.17 0.29
2 A1 1881 1784 103.11 3.59 0.42 0.59
3 A1 1570 1489 5.67 14.29 0.61 0.76
4 B1 1209 1146 2.03 1.99 0.75 0.86
5 B2 3006 2851 157.99 75.19 0.75 0.86
6 B2 1287 1221 12.37 6.94 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5951.8 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 5644.1 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 mPW1PW91/6-31G*
ABC
9.53240 1.29814 1.14254

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.675
C2 0.000 0.000 -0.527
H3 0.000 0.937 -1.120
H4 0.000 -0.937 -1.120

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.20222.02442.0244
C21.20221.10841.1084
H32.02441.10841.8734
H42.02441.10841.8734

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 122.317 O1 C2 H4 122.317
H3 C2 H4 115.366
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.331      
2 C 0.050      
3 H 0.140      
4 H 0.140      


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 -2.243 2.243
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.397 0.000 0.000
y 0.000 -11.428 0.000
z 0.000 0.000 -11.829
Traceless
 xyz
x 0.231 0.000 0.000
y 0.000 0.185 0.000
z 0.000 0.000 -0.416
Polar
3z2-r2-0.832
x2-y20.030
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.003 0.000 0.000
y 0.000 2.076 0.000
z 0.000 0.000 2.707


<r2> (average value of r2) Å2
<r2> 16.789
(<r2>)1/2 4.097