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: QCISD/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-230.216933
Energy at 298.15K-230.219926
Nuclear repulsion energy187.083648
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 QCISD/6-31G**
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 3283 3091 5.19      
2 A1 3256 3066 9.10      
3 A1 1980 1864 3.71      
4 A1 1522 1433 0.10      
5 A1 1348 1269 0.17      
6 A1 1189 1119 0.07      
7 A1 1074 1011 20.49      
8 A1 1026 966 2.22      
9 A1 622 585 0.11      
10 A2 929 875 0.00      
11 A2 871 819 0.00      
12 A2 532 501 0.00      
13 A2 403 379 0.00      
14 B1 916 863 0.19      
15 B1 758 714 63.00      
16 B1 388 365 4.06      
17 B2 3280 3088 34.16      
18 B2 3241 3051 2.05      
19 B2 1554 1463 8.89      
20 B2 1463 1377 6.60      
21 B2 1296 1220 0.06      
22 B2 1144 1077 0.60      
23 B2 858 808 26.37      
24 B2 441 416 83.71      

Unscaled Zero Point Vibrational Energy (zpe) 16686.9 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 15709.1 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 QCISD/6-31G**
ABC
0.23254 0.18990 0.10453

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.629 -1.245
C2 0.000 -0.629 -1.245
C3 0.000 1.461 -0.127
C4 0.000 -1.461 -0.127
C5 0.000 0.707 1.059
C6 0.000 -0.707 1.059
H7 0.000 2.542 -0.130
H8 0.000 -2.542 -0.130
H9 0.000 1.226 2.010
H10 0.000 -1.226 2.010

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10
C11.25891.39282.37022.30522.66342.21333.36123.30913.7467
C21.25892.37021.39282.66342.30523.36122.21333.74673.3091
C31.39282.37022.92161.40572.47131.08084.00242.15033.4335
C42.37021.39282.92162.47131.40574.00241.08083.43352.1503
C52.30522.66341.40572.47131.41402.18633.45941.08352.1545
C62.66342.30522.47131.40571.41403.45942.18632.15451.0835
H72.21333.36121.08084.00242.18633.45945.08322.51214.3333
H83.36122.21334.00241.08083.45942.18635.08324.33332.5121
H93.30913.74672.15033.43351.08352.15452.51214.33332.4525
H103.74673.30913.43352.15032.15451.08354.33332.51212.4525

picture of Benzyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 126.651 C1 C3 C5 110.919
C1 C3 H7 126.505 C2 C1 C3 126.651
C2 C4 C6 110.919 C2 C4 H8 126.505
C3 C5 C6 122.429 C3 C5 H9 118.935
C4 C6 C5 122.429 C4 C6 H10 118.935
C5 C3 H7 122.576 C5 C6 H10 118.636
C6 C4 H8 122.576 C6 C5 H9 118.636
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability