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

using model chemistry: MP2/CEP-121G*

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/CEP-121G*
Rotational Constants (cm-1) from geometry optimized at MP2/CEP-121G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-18.417345
Energy at 298.15K-18.419079
HF Energy-18.056387
Nuclear repulsion energy29.513124
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/CEP-121G*
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 3158 0.04      
2 A' 3102 2955 61.97      
3 A' 1604 1528 0.91      
4 A' 1242 1183 9.58      
5 A' 1028 980 13.36      
6 A' 942 898 8.19      
7 A' 606 577 87.75      
8 A" 6129 5840 265224.80      
9 A" 3069 2924 3017.00      
10 A" 1020 972 19.57      
11 A" 983 936 0.05      
12 A" 854 814 0.24      

Unscaled Zero Point Vibrational Energy (zpe) 11946.0 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 11382.1 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/CEP-121G*
ABC
1.03548 0.87511 0.48847

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.037 0.897 0.000
H2 0.753 1.655 0.000
C3 -0.037 -0.422 0.667
C4 -0.037 -0.422 -0.667
H5 -0.044 -0.985 1.591
H6 -0.044 -0.985 -1.591

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6
C11.09491.47811.47812.46462.4646
H21.09492.32042.32043.18423.1842
C31.47812.32041.33311.08232.3265
C41.47812.32041.33312.32651.0823
H52.46463.18421.08232.32653.1814
H62.46463.18422.32651.08233.1814

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 63.194 C1 C3 H5 148.166
C1 C4 C3 63.194 C1 C4 H6 148.166
H2 C1 C3 128.180 H2 C1 C4 128.180
C3 C1 C4 53.613 C3 C4 H6 148.636
C4 C3 H5 148.636
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability