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All results from a given calculation for C3H3 (cyclopropenyl radical)

using model chemistry: QCISD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes CS 2A'

Conformer 1 (D3H)

Jump to S1C2
Vibrational Frequencies calculated at QCISD/6-311G**
Rotational Constants (cm-1) from geometry optimized at QCISD/6-311G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G**
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at QCISD/6-311G**
 hartrees
Energy at 0K-115.637776
Energy at 298.15K-115.639383
HF Energy-115.219515
Nuclear repulsion energy57.675953
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/6-311G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3324 3172 0.31      
2 A' 3108 2966 51.93      
3 A' 1654 1578 0.82      
4 A' 1244 1187 7.71      
5 A' 1021 974 15.01      
6 A' 938 895 4.73      
7 A' 610 582 72.10      
8 A" 3275 3125 5.36      
9 A" 1055 1006 20.38      
10 A" 1001 956 4.28      
11 A" 866 826 0.24      
12 A" 682 651 50.01      

Unscaled Zero Point Vibrational Energy (zpe) 9389.2 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 8958.2 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 QCISD/6-311G**
ABC
1.05381 0.87842 0.49335

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.037 0.895 0.000
H2 0.747 1.656 0.000
C3 -0.037 -0.421 0.660
C4 -0.037 -0.421 -0.660
H5 -0.040 -0.984 1.580
H6 -0.040 -0.984 -1.580

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.09241.47251.47252.45562.4556
H21.09242.31622.31623.17623.1762
C31.47252.31621.31991.07902.3100
C41.47252.31621.31992.31001.0790
H52.45563.17621.07902.31003.1608
H62.45563.17622.31001.07903.1608

picture of cyclopropenyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C4 63.373 C1 C3 H5 148.080
C1 C4 C3 63.373 C1 C4 H6 148.080
H2 C1 C3 128.505 H2 C1 C4 128.505
C3 C1 C4 53.255 C3 C4 H6 148.546
C4 C3 H5 148.546
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability