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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: mPW1PW91/TZVP

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/TZVP
 hartrees
Energy at 0K-114.512379
Energy at 298.15K-114.513827
HF Energy-114.512379
Nuclear repulsion energy31.447339
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/TZVP
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 2915 2781 63.37 176.93 0.17 0.28
2 A1 1855 1769 114.68 7.06 0.42 0.59
3 A1 1550 1479 9.50 12.17 0.60 0.75
4 B1 1219 1163 3.14 2.07 0.75 0.86
5 B2 2977 2841 135.30 92.94 0.75 0.86
6 B2 1281 1222 10.19 5.15 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5898.2 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 5626.8 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/TZVP
ABC
9.50100 1.31149 1.15241

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.672
C2 0.000 0.000 -0.525
H3 0.000 0.938 -1.112
H4 0.000 -0.938 -1.112

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.19672.01512.0151
C21.19671.10651.1065
H32.01511.10651.8764
H42.01511.10651.8764

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 122.015 O1 C2 H4 122.015
H3 C2 H4 115.971
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.260      
2 C 0.107      
3 H 0.076      
4 H 0.076      


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 -2.380 2.380
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.561 0.000 0.000
y 0.000 -11.546 0.000
z 0.000 0.000 -12.244
Traceless
 xyz
x 0.334 0.000 0.000
y 0.000 0.357 0.000
z 0.000 0.000 -0.691
Polar
3z2-r2-1.381
x2-y2-0.016
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.277 0.000 0.000
y 0.000 2.212 0.000
z 0.000 0.000 3.064


<r2> (average value of r2) Å2
<r2> 16.855
(<r2>)1/2 4.106