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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: mPW1PW91/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-22.811923
Energy at 298.15K-22.813368
HF Energy-22.811923
Nuclear repulsion energy17.720117
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/CEP-121G*
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 2926 2779 74.32      
2 A1 1832 1740 114.99      
3 A1 1546 1469 8.65      
4 B1 1204 1144 3.27      
5 B2 2994 2844 160.54      
6 B2 1272 1208 12.34      

Unscaled Zero Point Vibrational Energy (zpe) 5886.5 cm-1
Scaled (by 0.9499) Zero Point Vibrational Energy (zpe) 5591.6 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/CEP-121G*
ABC
9.42716 1.28588 1.13154

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.678
C2 0.000 0.000 -0.531
H3 0.000 0.942 -1.121
H4 0.000 -0.942 -1.121

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.20932.03052.0305
C21.20931.11121.1112
H32.03051.11121.8838
H42.03051.11121.8838

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 122.043 O1 C2 H4 122.043
H3 C2 H4 115.914
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.243      
2 C -0.019      
3 H 0.131      
4 H 0.131      


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 -2.367 2.367
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.531 0.000 0.000
y 0.000 -11.452 0.000
z 0.000 0.000 -11.949
Traceless
 xyz
x 0.169 0.000 0.000
y 0.000 0.288 0.000
z 0.000 0.000 -0.457
Polar
3z2-r2-0.915
x2-y2-0.079
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.200 0.000 0.000
y 0.000 2.179 0.000
z 0.000 0.000 2.949


<r2> (average value of r2) Å2
<r2> 15.447
(<r2>)1/2 3.930