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 C6H4 (Benzyne)

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 C2V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-228.653241
Energy at 298.15K-228.656523
Nuclear repulsion energy185.401382
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 3238 3080 2.70      
2 A1 3209 3053 1.49      
3 A1 1896 1803 6.29      
4 A1 1475 1404 0.53      
5 A1 1323 1258 3.62      
6 A1 1214 1155 0.06      
7 A1 1026 976 17.67      
8 A1 984 936 2.06      
9 A1 643 611 0.00      
10 A2 919 874 0.00      
11 A2 857 815 0.00      
12 A2 657 625 0.00      
13 A2 484 460 0.00      
14 B1 900 856 0.17      
15 B1 745 709 90.98      
16 B1 400 381 6.61      
17 B2 3234 3076 17.38      
18 B2 3193 3038 0.25      
19 B2 1477 1405 6.40      
20 B2 1419 1350 7.04      
21 B2 1269 1207 2.55      
22 B2 1122 1068 0.05      
23 B2 936 890 5.97      
24 B2 643 611 5.08      

Unscaled Zero Point Vibrational Energy (zpe) 16630.0 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 15820.1 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 MP2/3-21G*
ABC
0.22745 0.18698 0.10262

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.636 -1.261
C2 0.000 -0.636 -1.261
C3 0.000 1.471 -0.126
C4 0.000 -1.471 -0.126
C5 0.000 0.714 1.071
C6 0.000 -0.714 1.071
H7 0.000 2.555 -0.127
H8 0.000 -2.555 -0.127
H9 0.000 1.240 2.022
H10 0.000 -1.240 2.022

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10
C11.27251.40882.39362.33242.69372.22893.38693.33783.7809
C21.27252.39361.40882.69372.33243.38692.22893.78093.3378
C31.40882.39362.94291.41652.49121.08394.02682.16083.4590
C42.39361.40882.94292.49121.41654.02681.08393.45902.1608
C52.33242.69371.41652.49121.42702.19703.48131.08742.1726
C62.69372.33242.49121.41651.42703.48132.19702.17261.0874
H72.22893.38691.08394.02682.19703.48135.11072.52004.3613
H83.38692.22894.02681.08393.48132.19705.11074.36132.5200
H93.33783.78092.16083.45901.08742.17262.52004.36132.4791
H103.78093.33783.45902.16082.17261.08744.36132.52002.4791

picture of Benzyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 126.362 C1 C3 C5 111.288
C1 C3 H7 126.313 C2 C1 C3 126.362
C2 C4 C6 111.288 C2 C4 H8 126.313
C3 C5 C6 122.350 C3 C5 H9 118.717
C4 C6 C5 122.350 C4 C6 H10 118.717
C5 C3 H7 122.399 C5 C6 H10 118.934
C6 C4 H8 122.399 C6 C5 H9 118.934
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability