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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3LYP/CEP-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 B3LYP/CEP-31G*
 hartrees
Energy at 0K-48.680916
Energy at 298.15K-48.686466
HF Energy-48.680916
Nuclear repulsion energy150.799772
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 B3LYP/CEP-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3236 3125 10.15      
2 A1 3194 3084 15.14      
3 A1 3174 3065 18.90      
4 A1 1699 1641 1.22      
5 A1 1564 1511 4.34      
6 A1 1506 1454 3.57      
7 A1 1431 1382 11.53      
8 A1 1166 1126 0.00      
9 A1 1106 1068 0.26      
10 A1 1050 1014 0.95      
11 A1 978 944 5.80      
12 A1 808 780 0.56      
13 A1 532 513 0.06      
14 A2 984 950 0.00      
15 A2 931 899 0.00      
16 A2 889 859 0.00      
17 A2 782 755 0.00      
18 A2 569 550 0.00      
19 A2 294 284 0.00      
20 B1 947 915 19.13      
21 B1 772 746 187.45      
22 B1 739 714 3.66      
23 B1 364 352 4.08      
24 B1 241 233 13.69      
25 B2 3200 3091 0.93      
26 B2 3187 3077 28.95      
27 B2 3152 3044 1.07      
28 B2 1649 1592 0.63      
29 B2 1443 1393 3.64      
30 B2 1284 1240 5.81      
31 B2 1230 1187 10.81      
32 B2 1082 1045 2.56      
33 B2 1017 982 0.14      
34 B2 853 824 1.51      
35 B2 634 612 0.86      
36 B2 405 391 4.07      

Unscaled Zero Point Vibrational Energy (zpe) 24044.8 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 23220.0 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 B3LYP/CEP-31G*
ABC
0.15580 0.07100 0.04877

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.470 -0.632
C2 0.000 0.700 -1.879
C3 0.000 -0.700 -1.879
C4 0.000 -1.470 -0.632
C5 0.000 -0.689 2.079
C6 0.000 0.689 2.079
C7 0.000 0.730 0.540
C8 0.000 -0.730 0.540
H9 0.000 2.564 -0.663
H10 0.000 1.243 -2.829
H11 0.000 -1.243 -2.829
H12 0.000 -2.564 -0.663
H13 0.000 -1.466 2.847
H14 0.000 1.466 2.847

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.46532.50222.93973.46552.82061.38592.49211.09432.20903.49144.03364.55173.4785
C21.46531.39952.50224.19393.95712.41842.80912.22551.09522.16333.48265.19774.7868
C32.50221.39951.46533.95714.19392.80912.41843.48262.16331.09522.22554.78685.1977
C42.93972.50221.46532.82063.46552.49211.38594.03363.49142.20901.09433.47854.5517
C53.46554.19393.95712.82061.37902.09331.53944.25415.27474.93903.32061.09212.2881
C62.82063.95714.19393.46551.37901.53942.09333.32064.93905.27474.25412.28811.0921
C71.38592.41842.80912.49212.09331.53941.45932.19303.40793.90423.50593.18462.4215
C82.49212.80912.41841.38591.53942.09331.45933.50593.90423.40792.19302.42153.1846
H91.09432.22553.48264.03364.25413.32062.19303.50592.53734.38055.12735.34333.6769
H102.20901.09522.16333.49145.27474.93903.40793.90422.53732.48684.38056.28935.6802
H113.49142.16331.09522.20904.93905.27473.90423.40794.38052.48682.53735.68026.2893
H124.03363.48262.22551.09433.32064.25413.50592.19305.12734.38052.53733.67695.3433
H134.55175.19774.78683.47851.09212.28813.18462.42155.34336.28935.68023.67692.9317
H143.47854.78685.19774.55172.28811.09212.42153.18463.67695.68026.28935.34332.9317

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.706 C1 C2 H10 118.532
C1 C7 C6 149.212 C1 C7 N8 122.283
C2 C1 C7 116.011 C2 C1 H9 120.100
C2 C3 C4 121.706 C2 C3 H11 119.762
C3 C2 H10 119.762 C3 C4 N8 116.011
C3 C4 H12 120.100 C4 C3 H11 118.532
C4 N8 C5 149.212 C4 N8 C7 122.283
C5 C6 C7 91.495 C5 C6 H14 135.310
C5 N8 C7 88.505 C6 C5 N8 91.495
C6 C5 H13 135.310 C6 C7 N8 88.505
C7 C1 H9 123.889 C7 C6 H14 133.196
N8 C4 H12 123.889 N8 C5 H13 133.196
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.093      
2 C -0.339      
3 C -0.339      
4 C -0.093      
5 C -0.295      
6 C -0.295      
7 C -0.230      
8 C -0.230      
9 H 0.330      
10 H 0.289      
11 H 0.289      
12 H 0.330      
13 H 0.338      
14 H 0.338      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.582 0.582
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.826 0.000 0.000
y 0.000 -39.905 0.000
z 0.000 0.000 -39.454
Traceless
 xyz
x -11.146 0.000 0.000
y 0.000 5.235 0.000
z 0.000 0.000 5.911
Polar
3z2-r211.822
x2-y2-10.921
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.070 0.000 0.000
y 0.000 13.728 0.000
z 0.000 0.000 16.857


<r2> (average value of r2) Å2
<r2> 177.918
(<r2>)1/2 13.339