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 C4H6O (Cyclobutanone)

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G*
 hartrees
Energy at 0K-230.953163
Energy at 298.15K 
HF Energy-230.953163
Nuclear repulsion energy169.868591
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 PBE1PBE/6-31G*
Rotational Constants (cm-1) from geometry optimized at PBE1PBE/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -0.169 1.867 0.000
C2 -0.045 0.673 0.000
C3 0.065 -0.380 1.105
C4 0.065 -0.380 -1.105
C5 0.065 -1.470 0.000
H6 0.982 -2.065 0.000
H7 -0.789 -2.151 0.000
H8 -0.820 -0.436 1.748
H9 -0.820 -0.436 -1.748
H10 0.944 -0.252 1.748
H11 0.944 -0.252 -1.748

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.19992.51432.51433.34514.09614.06562.96352.96352.96332.9633
C21.19991.53031.53032.14632.92392.92112.21072.21072.21072.2107
C32.51431.53032.21011.55252.21362.25601.09572.98771.09572.9876
C42.51431.53032.21011.55252.21362.25602.98771.09572.98761.0957
C53.34512.14631.55251.55251.09251.09262.21552.21552.30422.3042
H64.09612.92392.21362.21361.09251.77312.99242.99242.51802.5180
H74.06562.92112.25602.25601.09261.77312.44912.44913.10853.1085
H82.96352.21071.09572.98772.21552.99242.44913.49561.77343.9196
H92.96352.21072.98771.09572.21552.99242.44913.49563.91961.7734
H102.96332.21071.09572.98762.30422.51803.10851.77343.91963.4954
H112.96332.21072.98761.09572.30422.51803.10853.91961.77343.4954

picture of Cyclobutanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 133.772 O1 C2 C4 133.772
C2 C3 C5 88.243 C2 C3 H8 113.641
C2 C3 H10 113.645 C2 C4 C5 88.243
C2 C4 H9 113.641 C2 C4 H11 113.645
C3 C2 C4 92.456 C3 C5 C4 90.758
C3 C5 H6 112.462 C3 C5 H7 115.972
C4 C5 H6 112.462 C4 C5 H7 115.972
C5 C3 H8 112.417 C5 C3 H10 119.946
C5 C4 H9 112.417 C5 C4 H11 119.946
H6 C5 H7 108.479 H8 C3 H10 108.043
H9 C4 H11 108.043
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.423      
2 C 0.424      
3 C -0.400      
4 C -0.400      
5 C -0.379      
6 H 0.191      
7 H 0.205      
8 H 0.199      
9 H 0.199      
10 H 0.192      
11 H 0.192      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.047 -3.028 0.000 3.028
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.348 -0.828 0.000
y -0.828 -34.614 0.000
z 0.000 0.000 -28.519
Traceless
 xyz
x 3.219 -0.828 0.000
y -0.828 -6.180 0.000
z 0.000 0.000 2.962
Polar
3z2-r25.923
x2-y26.266
xy-0.828
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 100.082
(<r2>)1/2 10.004