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All results from a given calculation for C3H4O (Cyclopropanone)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-190.071268
Energy at 298.15K-190.075526
HF Energy-189.649259
Nuclear repulsion energy106.762585
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 QCISD/3-21G
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 3045 0.04      
2 A1 1835 1779 132.34      
3 A1 1502 1456 4.98      
4 A1 1106 1072 41.61      
5 A1 963 934 0.07      
6 A1 674 654 2.86      
7 A2 3221 3122 0.00      
8 A2 1185 1148 0.00      
9 A2 737 714 0.00      
10 B1 3235 3135 3.40      
11 B1 1149 1114 0.07      
12 B1 746 723 1.83      
13 B1 407 394 2.37      
14 B2 3138 3041 1.83      
15 B2 1489 1443 6.12      
16 B2 1131 1096 0.65      
17 B2 976 946 144.86      
18 B2 508 492 0.70      

Unscaled Zero Point Vibrational Energy (zpe) 13571.6 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 13153.5 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 QCISD/3-21G
ABC
0.65685 0.23821 0.18813

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

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 1.617
C3 0.000 0.803 -0.877
C4 0.000 -0.803 -0.877
H5 0.920 1.296 -1.186
H6 -0.920 1.296 -1.186
H7 -0.920 -1.296 -1.186
H8 0.920 -1.296 -1.186

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8
C11.22791.49921.49922.23702.23702.23702.2370
O21.22792.61992.61993.22163.22163.22163.2216
C31.49922.61991.60651.08821.08822.31242.3124
C41.49922.61991.60652.31242.31241.08821.0882
H52.23703.22161.08822.31241.84013.17812.5913
H62.23703.22161.08822.31241.84012.59133.1781
H72.23703.22162.31241.08823.17812.59131.8401
H82.23703.22162.31241.08822.59133.17811.8401

picture of Cyclopropanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C4 57.602 C1 C3 H5 118.809
C1 C3 H6 118.809 C1 C4 C3 57.602
C1 C4 H7 118.809 C1 C4 H8 118.809
O2 C1 C3 147.602 O2 C1 C4 147.602
C3 C1 C4 64.795 C3 C4 H7 116.903
C3 C4 H8 116.903 C4 C3 H5 116.903
C4 C3 H6 116.903 H5 C3 H6 115.446
H7 C4 H8 115.446
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability