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

using model chemistry: QCISD(T)/6-31G*

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(T)/6-31G*
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at QCISD(T)/6-31G*
 hartrees
Energy at 0K-115.591288
Energy at 298.15K-115.592950
HF Energy-115.190628
Nuclear repulsion energy57.586792
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(T)/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 A' 3314 3179        
2 A' 3093 2967        
3 A' 1721 1651        
4 A' 1251 1200        
5 A' 1037 994        
6 A' 944 906        
7 A' 570 546        
8 A" 3276 3143        
9 A" 1142 1095        
10 A" 1043 1001        
11 A" 938 899        
12 A" 828 794        

Unscaled Zero Point Vibrational Energy (zpe) 9577.4 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 9187.6 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(T)/6-31G*
ABC
1.04745 0.87853 0.49217

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.038 0.895 0.000
H2 0.751 1.656 0.000
C3 -0.038 -0.421 0.662
C4 -0.038 -0.421 -0.662
H5 -0.037 -0.986 1.586
H6 -0.037 -0.986 -1.586

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.09611.47271.47272.45982.4598
H21.09612.31832.31833.18053.1805
C31.47272.31831.32341.08302.3175
C41.47272.31831.32342.31751.0830
H52.45983.18051.08302.31753.1720
H62.45983.18052.31751.08303.1720

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 63.300 C1 C3 H5 148.116
C1 C4 C3 63.300 C1 C4 H6 148.116
H2 C1 C3 128.370 H2 C1 C4 128.370
C3 C1 C4 53.401 C3 C4 H6 148.584
C4 C3 H5 148.584
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability