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/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 CCD/cc-pVTZ
 hartrees
Energy at 0K-152.326514
Energy at 298.15K-152.327626
HF Energy-151.784935
Nuclear repulsion energy58.717759
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/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 3229 3015 26.84      
2 A1 2261 2111 670.03      
3 A1 1448 1352 13.72      
4 A1 1184 1105 4.25      
5 B1 618 577 70.59      
6 B1 557 520 56.76      
7 B2 3334 3113 7.23      
8 B2 1015 948 3.81      
9 B2 449 419 3.74      

Unscaled Zero Point Vibrational Energy (zpe) 7046.9 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 6579.7 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/cc-pVTZ
ABC
9.46236 0.34507 0.33293

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.209
C2 0.000 0.000 0.104
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
C11.31262.46961.07551.0755
C21.31261.15702.06172.0617
O32.46961.15703.13613.1361
H41.07552.06173.13611.8803
H51.07552.06173.13611.8803

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 119.053
C2 C1 H5 119.053 H4 C1 H5 121.895
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability