return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for H2CO (Formaldehyde)

using model chemistry: B3LYPultrafine/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYPultrafine/cc-pVTZ
 hartrees
Energy at 0K-114.549407
Energy at 298.15K-114.550853
HF Energy-114.549407
Nuclear repulsion energy31.398907
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 B3LYPultrafine/cc-pVTZ
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 2877 2781 69.03 183.28 0.14 0.25
2 A1 1824 1764 106.94 5.22 0.58 0.73
3 A1 1537 1485 9.90 11.70 0.54 0.70
4 B1 1203 1163 3.22 1.03 0.75 0.86
5 B2 2931 2833 144.70 98.01 0.75 0.86
6 B2 1268 1226 12.80 3.69 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5819.9 cm-1
Scaled (by 0.9667) Zero Point Vibrational Energy (zpe) 5626.1 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 B3LYPultrafine/cc-pVTZ
ABC
9.52252 1.30600 1.14849

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.673
C2 0.000 0.000 -0.526
H3 0.000 0.937 -1.115
H4 0.000 -0.937 -1.115

Atom - Atom Distances (Å)
  O1 C2 H3 H4
O11.19902.01862.0186
C21.19901.10681.1068
H32.01861.10681.8743
H42.01861.10681.8743

picture of Formaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 122.142 O1 C2 H4 122.142
H3 C2 H4 115.716
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.240      
2 C 0.164      
3 H 0.038      
4 H 0.038      


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 -2.281 2.281
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -11.629 0.000 0.000
y 0.000 -11.651 0.000
z 0.000 0.000 -12.182
Traceless
 xyz
x 0.288 0.000 0.000
y 0.000 0.254 0.000
z 0.000 0.000 -0.542
Polar
3z2-r2-1.085
x2-y20.023
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.474 0.000 0.000
y 0.000 2.379 0.000
z 0.000 0.000 3.021


<r2> (average value of r2) Å2
<r2> 16.909
(<r2>)1/2 4.112