return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP4/TZVP

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 MP4/TZVP
Rotational Constants (cm-1) from geometry optimized at MP4/TZVP
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/TZVP
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP4/TZVP
 hartrees
Energy at 0K-115.662192
Energy at 298.15K-115.663938
HF Energy-115.228787
Nuclear repulsion energy57.825534
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 MP4/TZVP
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' 3398 3272        
2 A' 3110 2994        
3 A' 2178 2097        
4 A' 1245 1199        
5 A' 1008 971        
6 A' 951 916        
7 A' 569 548        
8 A" 3914 3768        
9 A" 2755 2653        
10 A" 1291 1243        
11 A" 1051 1012        
12 A" 791 762        

Unscaled Zero Point Vibrational Energy (zpe) 11130.3 cm-1
Scaled (by 0.9629) Zero Point Vibrational Energy (zpe) 10717.4 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 MP4/TZVP
ABC
1.05533 0.88656 0.49598

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.036 0.890 0.000
H2 0.743 1.652 0.000
C3 -0.036 -0.419 0.660
C4 -0.036 -0.419 -0.660
H5 -0.052 -0.980 1.578
H6 -0.052 -0.980 -1.578

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.08951.46651.46652.44762.4476
H21.08952.30932.30933.17053.1705
C31.46652.30931.31991.07622.3075
C41.46652.30931.31992.30751.0762
H52.44763.17051.07622.30753.1566
H62.44763.17052.30751.07623.1566

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 63.256 C1 C3 H5 148.155
C1 C4 C3 63.256 C1 C4 H6 148.155
H2 C1 C3 128.630 H2 C1 C4 128.630
C3 C1 C4 53.489 C3 C4 H6 148.569
C4 C3 H5 148.569
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability