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: B3PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-152.578600
Energy at 298.15K-152.579674
HF Energy-152.578600
Nuclear repulsion energy58.643344
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 B3PW91/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3187 3068 24.22      
2 A1 2254 2170 605.35      
3 A1 1414 1361 20.04      
4 A1 1178 1135 8.00      
5 B1 589 567 26.75      
6 B1 548 527 135.03      
7 B2 3280 3157 6.61      
8 B2 1000 962 10.43      
9 B2 447 430 1.96      

Unscaled Zero Point Vibrational Energy (zpe) 6947.8 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 6688.7 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 B3PW91/6-311G*
ABC
9.50250 0.34443 0.33239

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.206
C2 0.000 0.000 0.103
O3 0.000 0.000 1.263
H4 0.000 0.938 -1.744
H5 0.000 -0.938 -1.744

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.30882.46891.08171.0817
C21.30881.16012.07182.0718
O32.46891.16013.15033.1503
H41.08172.07183.15031.8763
H51.08172.07183.15031.8763

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 119.851
C2 C1 H5 119.851 H4 C1 H5 120.297
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.634      
2 C 0.317      
3 O -0.228      
4 H 0.272      
5 H 0.272      


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 -1.439 1.439
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.838 0.000 0.000
y 0.000 -15.038 0.000
z 0.000 0.000 -17.767
Traceless
 xyz
x -2.436 0.000 0.000
y 0.000 3.265 0.000
z 0.000 0.000 -0.829
Polar
3z2-r2-1.658
x2-y2-3.801
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.898 0.000 0.000
y 0.000 2.308 0.000
z 0.000 0.000 5.534


<r2> (average value of r2) Å2
<r2> 40.148
(<r2>)1/2 6.336