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All results from a given calculation for CH2CO (Ketene)

using model chemistry: CCD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-151.183103
Energy at 298.15K-151.184314
HF Energy-150.874121
Nuclear repulsion energy57.805728
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 CCD/3-21G*
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 3200 3061 16.05      
2 A1 2201 2105 356.24      
3 A1 1504 1439 15.81      
4 A1 1180 1129 8.78      
5 B1 763 729 171.41      
6 B1 565 540 7.84      
7 B2 3285 3143 1.50      
8 B2 1091 1043 6.18      
9 B2 480 460 1.49      

Unscaled Zero Point Vibrational Energy (zpe) 7134.2 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 6823.9 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 CCD/3-21G*
ABC
9.57978 0.33435 0.32308

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.220
C2 0.000 0.000 0.096
O3 0.000 0.000 1.285
H4 0.000 0.934 -1.769
H5 0.000 -0.934 -1.769

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.31612.50551.08381.0838
C21.31611.18942.08622.0862
O32.50551.18943.19433.1943
H41.08382.08623.19431.8687
H51.08382.08623.19431.8687

picture of Ketene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 180.000 C2 C1 H4 120.444
C2 C1 H5 120.444 H4 C1 H5 119.111
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability