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: TPSSh/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 TPSSh/6-31G**
 hartrees
Energy at 0K-152.605354
Energy at 298.15K-152.606388
HF Energy-152.605354
Nuclear repulsion energy58.172842
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 TPSSh/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 3208 3076 22.15 104.28 0.12 0.21
2 A1 2225 2133 502.01 2.08 0.48 0.65
3 A1 1426 1367 15.30 3.76 0.62 0.77
4 A1 1172 1124 6.69 29.14 0.30 0.46
5 B1 587 562 52.57 0.47 0.75 0.86
6 B1 519 498 94.12 3.29 0.75 0.86
7 B2 3305 3169 5.73 61.80 0.75 0.86
8 B2 994 953 7.00 0.04 0.75 0.86
9 B2 432 414 2.31 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6934.2 cm-1
Scaled (by 0.9587) Zero Point Vibrational Energy (zpe) 6647.8 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 TPSSh/6-31G**
ABC
9.46684 0.33873 0.32703

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.216
C2 0.000 0.000 0.100
O3 0.000 0.000 1.275
H4 0.000 0.940 -1.751
H5 0.000 -0.940 -1.751

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.31662.49121.08151.0815
C21.31661.17462.07642.0764
O32.49121.17463.16883.1688
H41.08152.07643.16881.8798
H51.08152.07643.16881.8798

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 119.646
C2 C1 H5 119.646 H4 C1 H5 120.709
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.440      
2 C 0.462      
3 O -0.379      
4 H 0.179      
5 H 0.179      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.482 1.482
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.513 0.000 0.000
y 0.000 2.299 0.000
z 0.000 0.000 5.427


<r2> (average value of r2) Å2
<r2> 40.403
(<r2>)1/2 6.356