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: CCSD(T)=FULL/aug-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 CCSD(T)=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-152.421435
Energy at 298.15K-152.422515
HF Energy-151.786305
Nuclear repulsion energy58.574627
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 CCSD(T)=FULL/aug-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 3218 3101        
2 A1 2202 2122        
3 A1 1431 1379        
4 A1 1163 1121        
5 B1 605 583        
6 B1 535 516        
7 B2 3293 3173        
8 B2 1006 969        
9 B2 442 425        

Unscaled Zero Point Vibrational Energy (zpe) 6947.5 cm-1
Scaled (by 0.9637) Zero Point Vibrational Energy (zpe) 6695.3 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 CCSD(T)=FULL/aug-cc-pVTZ
ABC
9.47897 0.34337 0.33137

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.211
C2 0.000 0.000 0.102
O3 0.000 0.000 1.265
H4 0.000 0.939 -1.733
H5 0.000 -0.939 -1.733

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.31342.47601.07471.0747
C21.31341.16272.06202.0620
O32.47601.16273.14203.1420
H41.07472.06203.14201.8786
H51.07472.06203.14201.8786

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 119.075
C2 C1 H5 119.075 H4 C1 H5 121.850
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability