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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: mPW1PW91/CEP-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/CEP-31G
 hartrees
Energy at 0K-22.765850
Energy at 298.15K-22.767290
HF Energy-22.765850
Nuclear repulsion energy17.399305
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-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 3006 2855 77.39      
2 A1 1721 1635 61.14      
3 A1 1538 1461 16.60      
4 B1 1195 1135 18.11      
5 B2 3099 2944 162.17      
6 B2 1258 1195 7.56      

Unscaled Zero Point Vibrational Energy (zpe) 5907.9 cm-1
Scaled (by 0.9499) Zero Point Vibrational Energy (zpe) 5611.9 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-31G
ABC
9.38513 1.22639 1.08465

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.695
C2 0.000 0.000 -0.549
H3 0.000 0.944 -1.131
H4 0.000 -0.944 -1.131

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.24362.05532.0553
C21.24361.10901.1090
H32.05531.10901.8880
H42.05531.10901.8880

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.658 O1 C2 H4 121.658
H3 C2 H4 116.683
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.123      
2 C -0.212      
3 H 0.167      
4 H 0.167      


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 -2.922 2.922
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.604 0.000 0.000
y 0.000 -11.206 0.000
z 0.000 0.000 -12.293
Traceless
 xyz
x 0.146 0.000 0.000
y 0.000 0.743 0.000
z 0.000 0.000 -0.889
Polar
3z2-r2-1.777
x2-y2-0.398
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.042 0.000 0.000
y 0.000 1.607 0.000
z 0.000 0.000 2.684


<r2> (average value of r2) Å2
<r2> 15.750
(<r2>)1/2 3.969