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 C3H4O (Cyclopropanone)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-191.810068
Energy at 298.15K-191.814183
HF Energy-191.810068
Nuclear repulsion energy108.636341
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 B3PW91/6-31G*
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 3142 3006 0.77      
2 A1 1977 1891 295.67      
3 A1 1456 1393 4.75      
4 A1 1079 1032 0.55      
5 A1 1036 991 31.56      
6 A1 746 714 4.79      
7 A2 3220 3081 0.00      
8 A2 1177 1126 0.00      
9 A2 640 612 0.00      
10 B1 3233 3093 2.73      
11 B1 1114 1066 0.62      
12 B1 713 682 1.93      
13 B1 319 305 4.73      
14 B2 3142 3006 2.82      
15 B2 1437 1374 5.45      
16 B2 1083 1036 21.32      
17 B2 973 931 116.20      
18 B2 510 487 1.70      

Unscaled Zero Point Vibrational Energy (zpe) 13498.3 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 12913.9 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 B3PW91/6-31G*
ABC
0.68120 0.24703 0.19545

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.385
O2 0.000 0.000 1.586
C3 0.000 0.782 -0.861
C4 0.000 -0.782 -0.861
H5 0.914 1.289 -1.165
H6 -0.914 1.289 -1.165
H7 -0.914 -1.289 -1.165
H8 0.914 -1.289 -1.165

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8
C11.20101.47081.47082.21352.21352.21352.2135
O21.20102.56852.56853.17243.17243.17243.1724
C31.47082.56851.56401.08891.08892.28442.2844
C41.47082.56851.56402.28442.28441.08891.0889
H52.21353.17241.08892.28441.82883.16112.5784
H62.21353.17241.08892.28441.82882.57843.1611
H72.21353.17242.28441.08893.16112.57841.8288
H82.21353.17242.28441.08892.57843.16111.8288

picture of Cyclopropanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C4 57.880 C1 C3 H5 118.953
C1 C3 H6 118.953 C1 C4 C3 57.880
C1 C4 H7 118.953 C1 C4 H8 118.953
O2 C1 C3 147.880 O2 C1 C4 147.880
C3 C1 C4 64.239 C3 C4 H7 117.761
C3 C4 H8 117.761 C4 C3 H5 117.761
C4 C3 H6 117.761 H5 C3 H6 114.219
H7 C4 H8 114.219
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.425      
2 O -0.402      
3 C -0.434      
4 C -0.434      
5 H 0.211      
6 H 0.211      
7 H 0.211      
8 H 0.211      


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 -2.809 2.809
CHELPG        
AIM        
ESP 0.020 0.000 -2.819 2.819


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.984 0.000 0.000
y 0.000 -22.385 0.000
z 0.000 0.000 -27.456
Traceless
 xyz
x 3.937 0.000 0.000
y 0.000 1.834 0.000
z 0.000 0.000 -5.771
Polar
3z2-r2-11.542
x2-y21.402
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.686 0.000 0.000
y 0.000 4.750 0.000
z 0.000 0.000 5.350


<r2> (average value of r2) Å2
<r2> 67.402
(<r2>)1/2 8.210