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: CISD/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CISD/6-31G
 hartrees
Energy at 0K-151.933297
Energy at 298.15K-151.934408
HF Energy-151.647110
Nuclear repulsion energy57.642951
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 CISD/6-31G
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 3255 3053 21.03      
2 A1 2165 2030 503.52      
3 A1 1502 1409 13.03      
4 A1 1174 1101 15.52      
5 B1 775 727 165.10      
6 B1 481 451 13.72      
7 B2 3353 3144 1.27      
8 B2 1080 1013 7.09      
9 B2 431 404 3.89      

Unscaled Zero Point Vibrational Energy (zpe) 7107.9 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 6665.8 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 CISD/6-31G
ABC
9.58006 0.33216 0.32103

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.225
C2 0.000 0.000 0.096
O3 0.000 0.000 1.290
H4 0.000 0.934 -1.770
H5 0.000 -0.934 -1.770

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.32152.51491.08171.0817
C21.32151.19332.08742.0874
O32.51491.19333.19943.1994
H41.08172.08743.19941.8687
H51.08172.08743.19941.8687

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 120.259
C2 C1 H5 120.259 H4 C1 H5 119.483
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability