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: CCD/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 CCD/6-31G*
 hartrees
Energy at 0K-191.302952
Energy at 298.15K-191.307157
HF Energy-190.724352
Nuclear repulsion energy108.464214
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 CCD/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 3170 3001 0.45      
2 A1 2005 1898 230.35      
3 A1 1496 1416 2.71      
4 A1 1089 1031 1.34      
5 A1 1080 1022 25.83      
6 A1 749 709 4.74      
7 A2 3251 3077 0.00      
8 A2 1198 1134 0.00      
9 A2 691 654 0.00      
10 B1 3261 3087 3.51      
11 B1 1143 1082 0.19      
12 B1 737 698 1.11      
13 B1 332 314 4.93      
14 B2 3168 2999 2.12      
15 B2 1473 1394 5.30      
16 B2 1131 1071 23.06      
17 B2 1020 965 105.53      
18 B2 520 492 2.99      

Unscaled Zero Point Vibrational Energy (zpe) 13757.4 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 13021.4 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 CCD/6-31G*
ABC
0.67800 0.24643 0.19487

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.409
O2 0.000 0.000 1.681
C3 0.000 0.802 -0.842
C4 0.000 -0.802 -0.842
H5 0.809 0.726 -1.448
H6 -0.809 0.726 -1.448
H7 -0.809 -0.726 -1.448
H8 0.809 -0.726 -1.448

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8
C11.27231.48601.48602.15182.15182.15182.1518
O21.27232.64792.64793.31293.31293.31293.3129
C31.48602.64791.60341.01331.01331.83151.8315
C41.48602.64791.60341.83151.83151.01331.0133
H52.15183.31291.01331.83151.61722.17321.4517
H62.15183.31291.01331.83151.61721.45172.1732
H72.15183.31291.83151.01332.17321.45171.6172
H82.15183.31291.83151.01331.45172.17321.6172

picture of Cyclopropanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C4 57.353 C1 C3 H5 117.594
C1 C3 H6 117.594 C1 C4 C3 57.353
C1 C4 H7 117.594 C1 C4 H8 117.594
O2 C1 C3 147.353 O2 C1 C4 147.353
C3 C1 C4 65.295 C3 C4 H7 85.709
C3 C4 H8 85.709 C4 C3 H5 85.709
C4 C3 H6 85.709 H5 C3 H6 105.870
H7 C4 H8 105.870
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability