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: CID/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 CID/3-21G
 hartrees
Energy at 0K-151.156118
Energy at 298.15K-151.157375
HF Energy-150.875256
Nuclear repulsion energy58.110306
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 CID/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 3258 3036 20.96      
2 A1 2238 2085 435.83      
3 A1 1527 1423 18.49      
4 A1 1209 1126 8.47      
5 B1 789 735 193.01      
6 B1 589 548 7.48      
7 B2 3345 3116 2.78      
8 B2 1111 1035 8.22      
9 B2 493 460 2.13      

Unscaled Zero Point Vibrational Energy (zpe) 7279.9 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 6781.9 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 CID/3-21G
ABC
9.64966 0.33791 0.32648

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.214
C2 0.000 0.000 0.096
O3 0.000 0.000 1.278
H4 0.000 0.931 -1.760
H5 0.000 -0.931 -1.760

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.31032.49231.07921.0792
C21.31031.18202.07662.0766
O32.49231.18203.17773.1777
H41.07922.07663.17771.8619
H51.07922.07663.17771.8619

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 120.387
C2 C1 H5 120.387 H4 C1 H5 119.226
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability