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: MP2=FULL/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 MP2=FULL/TZVP
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/TZVP
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/TZVP
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2=FULL/TZVP
 hartrees
Energy at 0K-115.670122
Energy at 298.15K-115.671869
HF Energy-115.229462
Nuclear repulsion energy58.114701
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 MP2=FULL/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' 3361 3202 0.80      
2 A' 3148 2999 44.36      
3 A' 1648 1570 0.95      
4 A' 1263 1203 8.64      
5 A' 1028 979 12.41      
6 A' 951 906 7.58      
7 A' 593 565 77.49      
8 A" 4378 4171 48588.25      
9 A" 2981 2840 5711.32      
10 A" 1026 977 16.16      
11 A" 1007 960 1.02      
12 A" 864 823 0.21      

Unscaled Zero Point Vibrational Energy (zpe) 11123.4 cm-1
Scaled (by 0.9527) Zero Point Vibrational Energy (zpe) 10597.2 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 MP2=FULL/TZVP
ABC
1.06311 0.89836 0.50108

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.035 0.883 0.000
H2 0.737 1.648 0.000
C3 -0.035 -0.416 0.658
C4 -0.035 -0.416 -0.658
H5 -0.052 -0.976 1.574
H6 -0.052 -0.976 -1.574

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.08601.45661.45662.43572.4357
H21.08602.29952.29953.15913.1591
C31.45662.29951.31511.07342.3002
C41.45662.29951.31512.30021.0734
H52.43573.15911.07342.30023.1472
H62.43573.15912.30021.07343.1472

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 63.166 C1 C3 H5 148.228
C1 C4 C3 63.166 C1 C4 H6 148.228
H2 C1 C3 128.897 H2 C1 C4 128.897
C3 C1 C4 53.667 C3 C4 H6 148.582
C4 C3 H5 148.582
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability