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All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: PBEPBE/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 PBEPBE/CEP-121G
 hartrees
Energy at 0K-22.753627
Energy at 298.15K-22.755062
HF Energy-22.753627
Nuclear repulsion energy17.265682
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 PBEPBE/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 2827 2827 66.19      
2 A1 1654 1654 59.64      
3 A1 1488 1488 20.12      
4 B1 1157 1157 11.09      
5 B2 2909 2909 178.30      
6 B2 1220 1220 5.49      

Unscaled Zero Point Vibrational Energy (zpe) 5626.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5626.7 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 PBEPBE/CEP-121G
ABC
9.27623 1.20689 1.06794

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.700
C2 0.000 0.000 -0.553
H3 0.000 0.950 -1.143
H4 0.000 -0.950 -1.143

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.25282.07322.0732
C21.25281.11801.1180
H32.07321.11801.8990
H42.07321.11801.8990

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 121.864 O1 C2 H4 121.864
H3 C2 H4 116.272
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.127      
2 C -0.115      
3 H 0.121      
4 H 0.121      


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 -2.464 2.464
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.730 0.000 0.000
y 0.000 -11.651 0.000
z 0.000 0.000 -12.491
Traceless
 xyz
x 0.340 0.000 0.000
y 0.000 0.459 0.000
z 0.000 0.000 -0.800
Polar
3z2-r2-1.600
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 1.127 0.000 0.000
y 0.000 2.147 0.000
z 0.000 0.000 3.164


<r2> (average value of r2) Å2
<r2> 16.047
(<r2>)1/2 4.006