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 C6H6 (Trimethylenecycopropane)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A'
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-229.782123
Energy at 298.15K-229.786447
HF Energy-229.255848
Nuclear repulsion energy187.575195
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 MP2/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1' 3165 3021 0.00      
2 A1' 1848 1764 0.00      
3 A1' 1549 1479 0.00      
4 A1' 744 711 0.00      
5 A1" 777 741 0.00      
6 A2' 3249 3101 0.00      
7 A2' 1142 1090 0.00      
8 A2' 528 504 0.00      
9 A2" 915 873 143.68      
10 A2" 190 182 7.79      
11 E' 3250 3102 9.26      
11 E' 3250 3102 9.26      
12 E' 3164 3020 7.13      
12 E' 3164 3020 7.13      
13 E' 1671 1595 5.27      
13 E' 1671 1595 5.27      
14 E' 1513 1444 6.77      
14 E' 1513 1444 6.77      
15 E' 1170 1116 7.71      
15 E' 1170 1116 7.71      
16 E' 761 726 5.84      
16 E' 761 726 5.84      
17 E' 231 221 0.21      
17 E' 231 221 0.21      
18 E" 906 865 0.00      
18 E" 906 865 0.00      
19 E" 767 732 0.00      
19 E" 767 732 0.00      
20 E" 268 256 0.00      
20 E" 268 256 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 20753.5 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 19809.2 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 MP2/3-21G
ABC
0.13529 0.13529 0.06764

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.850 0.000
C2 0.737 -0.425 0.000
C3 -0.737 -0.425 0.000
C4 0.000 2.187 0.000
C5 1.894 -1.093 0.000
C6 -1.894 -1.093 0.000
H7 -0.927 2.754 0.000
H8 0.927 2.754 0.000
H9 2.849 -0.574 0.000
H10 1.922 -2.180 0.000
H11 -1.922 -2.180 0.000
H12 -2.849 -0.574 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12
C11.47301.47301.33612.71362.71362.11752.11753.18523.58833.58833.1852
C21.47301.47302.71361.33612.71363.58833.18522.11752.11743.18523.5883
C31.47301.47302.71362.71361.33613.18523.58833.58833.18522.11742.1175
C41.33612.71362.71363.78723.78721.08691.08693.96714.77064.77063.9671
C52.71361.33612.71363.78723.78724.77063.96711.08691.08693.96714.7706
C62.71362.71361.33613.78723.78723.96714.77064.77063.96711.08691.0869
H72.11753.58833.18521.08694.77063.96711.85365.03345.69745.03343.8437
H82.11753.18523.58831.08693.96714.77061.85363.84375.03345.69745.0334
H93.18522.11753.58833.96711.08694.77065.03343.84371.85365.03345.6974
H103.58832.11743.18524.77061.08693.96715.69745.03341.85363.84375.0334
H113.58833.18522.11744.77063.96711.08695.03345.69745.03343.84371.8536
H123.18523.58832.11753.96714.77061.08693.84375.03345.69745.03341.8536

picture of Trimethylenecycopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 60.000 C1 C2 C5 150.000
C1 C3 C2 60.000 C1 C3 C6 150.000
C1 C4 H7 121.491 C1 C4 H8 121.491
C2 C1 C3 60.000 C2 C1 C4 150.000
C2 C3 C6 150.000 C2 C5 H9 121.491
C2 C5 H10 121.491 C3 C1 C4 150.000
C3 C2 C5 150.000 C3 C6 H11 121.491
C3 C6 H12 121.491 H7 C4 H8 117.018
H9 C5 H10 117.018 H11 C6 H12 117.018
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability