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 CH2CO (Ketene)

using model chemistry: CCD/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-152.331402
Energy at 298.15K-152.332506
HF Energy-151.791496
Nuclear repulsion energy58.735374
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/Def2TZVPP
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 3230 3230 26.80      
2 A1 2257 2257 696.02      
3 A1 1449 1449 13.76      
4 A1 1185 1185 4.01      
5 B1 613 613 63.92      
6 B1 555 555 61.26      
7 B2 3337 3337 7.53      
8 B2 1016 1016 3.68      
9 B2 450 450 3.93      

Unscaled Zero Point Vibrational Energy (zpe) 7046.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7046.2 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/Def2TZVPP
ABC
9.46450 0.34521 0.33306

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.208
C2 0.000 0.000 0.105
O3 0.000 0.000 1.261
H4 0.000 0.940 -1.731
H5 0.000 -0.940 -1.731

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.31332.46901.07551.0755
C21.31331.15582.06252.0625
O32.46901.15583.13583.1358
H41.07552.06253.13581.8801
H51.07552.06253.13581.8801

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 119.070
C2 C1 H5 119.070 H4 C1 H5 121.860
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability