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: MP2/CEP-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 MP2/CEP-31G
 hartrees
Energy at 0K-34.665957
Energy at 298.15K-34.670034
HF Energy-34.311448
Nuclear repulsion energy55.974837
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 MP2/CEP-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 3134 3028 0.38      
2 A1 1746 1687 153.09      
3 A1 1467 1418 2.32      
4 A1 1089 1053 35.11      
5 A1 998 965 0.00      
6 A1 670 647 5.14      
7 A2 3242 3133 0.00      
8 A2 1168 1129 0.00      
9 A2 735 710 0.00      
10 B1 3256 3146 25.55      
11 B1 1123 1086 0.22      
12 B1 730 705 3.96      
13 B1 291 281 3.76      
14 B2 3130 3024 10.62      
15 B2 1455 1406 6.56      
16 B2 1109 1072 1.48      
17 B2 980 947 141.32      
18 B2 473 457 1.89      

Unscaled Zero Point Vibrational Energy (zpe) 13397.7 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 12946.2 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 MP2/CEP-31G
ABC
0.63163 0.22870 0.18047

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.389
O2 0.000 0.000 1.653
C3 0.000 0.820 -0.895
C4 0.000 -0.820 -0.895
H5 0.931 1.321 -1.206
H6 -0.931 1.321 -1.206
H7 -0.931 -1.321 -1.206
H8 0.931 -1.321 -1.206

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8
C11.26461.52361.52362.27042.27042.27042.2704
O21.26462.67722.67723.28433.28433.28433.2843
C31.52362.67721.64101.10191.10192.35592.3559
C41.52362.67721.64102.35592.35591.10191.1019
H52.27043.28431.10192.35591.86223.23272.6424
H62.27043.28431.10192.35591.86222.64243.2327
H72.27043.28432.35591.10193.23272.64241.8622
H82.27043.28432.35591.10192.64243.23271.8622

picture of Cyclopropanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C4 57.416 C1 C3 H5 118.837
C1 C3 H6 118.837 C1 C4 C3 57.416
C1 C4 H7 118.837 C1 C4 H8 118.837
O2 C1 C3 147.416 O2 C1 C4 147.416
C3 C1 C4 65.168 C3 C4 H7 117.027
C3 C4 H8 117.027 C4 C3 H5 117.027
C4 C3 H6 117.027 H5 C3 H6 115.341
H7 C4 H8 115.341
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability