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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3LYP/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 B3LYP/6-31G*
 hartrees
Energy at 0K-308.360334
Energy at 298.15K-308.365941
HF Energy-308.360334
Nuclear repulsion energy311.992719
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/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 3260 3131 15.49      
2 A1 3211 3084 19.02      
3 A1 3195 3069 13.68      
4 A1 1715 1647 2.76      
5 A1 1590 1527 1.18      
6 A1 1510 1450 1.91      
7 A1 1456 1398 9.63      
8 A1 1198 1151 0.01      
9 A1 1109 1065 0.11      
10 A1 1078 1035 0.39      
11 A1 984 945 3.45      
12 A1 820 788 0.35      
13 A1 550 528 0.16      
14 A2 958 920 0.00      
15 A2 906 870 0.00      
16 A2 874 839 0.00      
17 A2 785 754 0.00      
18 A2 582 559 0.00      
19 A2 300 288 0.00      
20 B1 907 871 7.58      
21 B1 752 722 88.57      
22 B1 724 695 2.16      
23 B1 367 353 1.56      
24 B1 238 229 8.17      
25 B2 3230 3102 2.93      
26 B2 3204 3077 39.48      
27 B2 3183 3057 0.06      
28 B2 1665 1599 0.24      
29 B2 1473 1415 3.37      
30 B2 1318 1266 2.43      
31 B2 1263 1213 11.73      
32 B2 1101 1057 1.64      
33 B2 1052 1010 1.39      
34 B2 873 839 0.30      
35 B2 656 630 0.67      
36 B2 422 405 3.77      

Unscaled Zero Point Vibrational Energy (zpe) 24254.8 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 23291.9 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/6-31G*
ABC
0.16095 0.07298 0.05021

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.443 -0.620
C2 0.000 0.686 -1.849
C3 0.000 -0.686 -1.849
C4 0.000 -1.443 -0.620
C5 0.000 -0.675 2.046
C6 0.000 0.675 2.046
C7 0.000 0.718 0.528
C8 0.000 -0.718 0.528
H9 0.000 2.529 -0.649
H10 0.000 1.226 -2.792
H11 0.000 -1.226 -2.792
H12 0.000 -2.529 -0.649
H13 0.000 -1.445 2.810
H14 0.000 1.445 2.810

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44362.45862.88573.40492.77421.35772.44661.08702.18333.44163.97244.48333.4295
C21.44361.37262.45864.12653.89552.37762.76112.19961.08672.13253.43255.12334.7204
C32.45861.37261.44363.89554.12652.76112.37763.43252.13251.08672.19964.72045.1233
C42.88572.45861.44362.77423.40492.44661.35773.97243.44162.18331.08703.42954.4833
C53.40494.12653.89552.77421.35052.06041.51864.18745.19884.86973.27131.08412.2534
C62.77423.89554.12653.40491.35051.51862.06043.27134.86975.19884.18742.25341.0841
C71.35772.37762.76112.44662.06041.51861.43562.16053.35913.84773.45403.14372.3946
C82.44662.76112.37761.35771.51862.06041.43563.45403.84773.35912.16052.39463.1437
H91.08702.19963.43253.97244.18743.27132.16053.45402.50844.32455.05905.26853.6248
H102.18331.08672.13253.44165.19884.86973.35913.84772.50842.45294.32456.20635.6063
H113.44162.13251.08672.18334.86975.19883.84773.35914.32452.45292.50845.60636.2063
H123.97243.43252.19961.08703.27134.18743.45402.16055.05904.32452.50843.62485.2685
H134.48335.12334.72043.42951.08412.25343.14372.39465.26856.20635.60633.62482.8896
H143.42954.72045.12334.48332.25341.08412.39463.14373.62485.60636.20635.26852.8896

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.605 C1 C2 H10 118.591
C1 C7 C6 149.328 C1 C7 N8 122.277
C2 C1 C7 116.118 C2 C1 H9 120.069
C2 C3 C4 121.605 C2 C3 H11 119.804
C3 C2 H10 119.804 C3 C4 N8 116.118
C3 C4 H12 120.069 C4 C3 H11 118.591
C4 N8 C5 149.328 C4 N8 C7 122.277
C5 C6 C7 91.605 C5 C6 H14 135.222
C5 N8 C7 88.395 C6 C5 N8 91.605
C6 C5 H13 135.222 C6 C7 N8 88.395
C7 C1 H9 123.814 C7 C6 H14 133.173
N8 C4 H12 123.814 N8 C5 H13 133.173
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.249      
2 C -0.133      
3 C -0.133      
4 C -0.249      
5 C -0.165      
6 C -0.165      
7 C 0.147      
8 C 0.147      
9 H 0.130      
10 H 0.126      
11 H 0.126      
12 H 0.130      
13 H 0.145      
14 H 0.145      


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 0.704 0.704
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.452 0.000 0.000
y 0.000 -40.635 0.000
z 0.000 0.000 -39.897
Traceless
 xyz
x -9.186 0.000 0.000
y 0.000 4.040 0.000
z 0.000 0.000 5.146
Polar
3z2-r210.292
x2-y2-8.817
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.017 0.000 0.000
y 0.000 12.951 0.000
z 0.000 0.000 15.760


<r2> (average value of r2) Å2
<r2> 220.874
(<r2>)1/2 14.862