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: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-191.332750
Energy at 298.15K-191.336874
HF Energy-190.722260
Nuclear repulsion energy107.812734
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 MP4/6-31G*
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 3146 3004        
2 A1 1892 1806        
3 A1 1478 1411        
4 A1 1062 1014        
5 A1 1054 1006        
6 A1 726 694        
7 A2 3227 3082        
8 A2 1186 1133        
9 A2 670 640        
10 B1 3239 3092        
11 B1 1123 1072        
12 B1 725 692        
13 B1 312 298        
14 B2 3144 3002        
15 B2 1460 1394        
16 B2 1101 1051        
17 B2 985 941        
18 B2 505 483        

Unscaled Zero Point Vibrational Energy (zpe) 13516.8 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 12905.8 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 MP4/6-31G*
ABC
0.67359 0.24276 0.19225

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.384
O2 0.000 0.000 1.602
C3 0.000 -0.788 -0.868
C4 0.000 0.788 -0.868
H5 -0.917 -1.292 -1.175
H6 0.917 -1.292 -1.175
H7 0.917 1.292 -1.175
H8 -0.917 1.292 -1.175

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8
C11.21811.47871.47872.22272.22272.22272.2227
O21.21812.59212.59213.19723.19723.19723.1972
C31.47872.59211.57621.09081.09082.29402.2940
C41.47872.59211.57622.29402.29401.09081.0908
H52.22273.19721.09082.29401.83453.16892.5839
H62.22273.19721.09082.29401.83452.58393.1689
H72.22273.19722.29401.09083.16892.58391.8345
H82.22273.19722.29401.09082.58393.16891.8345

picture of Cyclopropanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C4 57.795 C1 C3 H5 119.001
C1 C3 H6 119.001 C1 C4 C3 57.795
C1 C4 H7 119.001 C1 C4 H8 119.001
O2 C1 C3 147.795 O2 C1 C4 147.795
C3 C1 C4 64.411 C3 C4 H7 117.510
C3 C4 H8 117.510 C4 C3 H5 117.510
C4 C3 H6 117.510 H5 C3 H6 114.468
H7 C4 H8 114.468
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability