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

using model chemistry: QCISD/3-21G*

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/3-21G*
Rotational Constants (cm-1) from geometry optimized at QCISD/3-21G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-114.802879
Energy at 298.15K-114.804435
HF Energy-114.525746
Nuclear repulsion energy56.853383
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 A' 3310 3182 0.41      
2 A' 3126 3004 33.19      
3 A' 1591 1529 0.20      
4 A' 1155 1110 13.13      
5 A' 1017 978 6.08      
6 A' 935 899 2.18      
7 A' 631 607 93.26      
8 A" 3266 3138 0.34      
9 A" 1107 1064 20.37      
10 A" 1019 979 14.39      
11 A" 854 821 0.26      
12 A" 594 571 25.81      

Unscaled Zero Point Vibrational Energy (zpe) 9302.3 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 8940.4 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
1.04466 0.83354 0.47757

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.038 0.924 0.000
H2 0.760 1.667 0.000
C3 -0.038 -0.434 0.664
C4 -0.038 -0.434 -0.664
H5 -0.041 -1.005 1.576
H6 -0.041 -1.005 -1.576

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.08971.51181.51182.49162.4916
H21.08972.34292.34293.20393.2039
C31.51182.34291.32901.07622.3126
C41.51182.34291.32902.31261.0762
H52.49163.20391.07622.31263.1528
H62.49163.20392.31261.07623.1528

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 63.927 C1 C3 H5 148.151
C1 C4 C3 63.927 C1 C4 H6 148.151
H2 C1 C3 127.722 H2 C1 C4 127.722
C3 C1 C4 52.147 C3 C4 H6 147.922
C4 C3 H5 147.922
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability