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All results from a given calculation for C3H4O (Methylketene)

using model chemistry: MP2/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31+G**
 hartrees
Energy at 0K-191.355268
Energy at 298.15K 
HF Energy-190.767606
Nuclear repulsion energy101.668302
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 MP2/6-31+G**
Rotational Constants (cm-1) from geometry optimized at MP2/6-31+G**
ABC
1.28093 0.14848 0.13644

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.673 -0.388 0.000
C2 0.000 0.753 0.000
C3 1.508 0.820 0.000
O4 -1.264 -1.409 0.000
H5 -0.594 1.657 0.000
H6 1.942 -0.179 0.000
H7 1.875 1.343 0.883
H8 1.875 1.343 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 O4 H5 H6 H7 H8
C11.32512.49391.17892.04652.62383.20513.2051
C21.32511.50982.50401.08112.15422.15512.1551
C32.49391.50983.55682.26221.08921.09011.0901
O41.17892.50403.55683.13773.43364.26674.2667
H52.04651.08112.26223.13773.13042.64052.6405
H62.62382.15421.08923.43363.13041.76121.7612
H73.20512.15511.09014.26672.64051.76121.7664
H83.20512.15511.09014.26672.64051.76121.7664

picture of Methylketene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 123.081 C1 C2 H5 116.165
C2 C1 O4 179.518 C2 C3 H6 110.930
C2 C3 H7 110.945 C2 C3 H8 110.945
C3 C2 H5 120.754 H6 C3 H7 107.829
H6 C3 H8 107.829 H7 C3 H8 108.232
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability