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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3LYP/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-308.466894
Energy at 298.15K-308.472571
HF Energy-308.466894
Nuclear repulsion energy313.151853
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/cc-pVTZ
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 3236 3128 10.02      
2 A1 3193 3087 15.71      
3 A1 3177 3071 8.79      
4 A1 1697 1640 3.13      
5 A1 1571 1519 2.19      
6 A1 1491 1441 2.85      
7 A1 1443 1395 9.72      
8 A1 1191 1151 0.02      
9 A1 1099 1062 0.13      
10 A1 1069 1033 0.38      
11 A1 974 941 4.86      
12 A1 816 788 0.50      
13 A1 549 531 0.27      
14 A2 976 944 0.00      
15 A2 925 894 0.00      
16 A2 886 856 0.00      
17 A2 785 759 0.00      
18 A2 589 569 0.00      
19 A2 299 289 0.00      
20 B1 923 892 8.37      
21 B1 752 727 103.75      
22 B1 720 696 1.91      
23 B1 365 353 2.62      
24 B1 231 223 11.57      
25 B2 3207 3100 2.15      
26 B2 3185 3079 31.43      
27 B2 3166 3060 0.01      
28 B2 1648 1593 0.19      
29 B2 1462 1413 4.20      
30 B2 1311 1267 3.04      
31 B2 1260 1218 13.18      
32 B2 1094 1058 2.74      
33 B2 1057 1022 0.55      
34 B2 874 845 0.40      
35 B2 659 637 0.68      
36 B2 419 405 4.03      

Unscaled Zero Point Vibrational Energy (zpe) 24148.5 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 23341.9 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/cc-pVTZ
ABC
0.16234 0.07345 0.05057

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.437 -0.617
C2 0.000 0.683 -1.842
C3 0.000 -0.683 -1.842
C4 0.000 -1.437 -0.617
C5 0.000 -0.673 2.039
C6 0.000 0.673 2.039
C7 0.000 0.715 0.525
C8 0.000 -0.715 0.525
H9 0.000 2.519 -0.646
H10 0.000 1.219 -2.782
H11 0.000 -1.219 -2.782
H12 0.000 -2.519 -0.646
H13 0.000 -1.438 2.800
H14 0.000 1.438 2.800

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43812.44792.87383.39222.76431.35102.43641.08232.17523.42613.95584.46543.4169
C21.43811.36552.44794.11093.88112.36692.74882.19111.08202.12133.41765.10304.7025
C32.44791.36551.43813.88114.11092.74882.36693.41762.12131.08202.19114.70255.1030
C42.87382.44791.43812.76433.39222.43641.35103.95583.42612.17521.08233.41694.4654
C53.39224.11093.88112.76431.34512.05411.51504.17085.17874.85173.25881.07882.2432
C62.76433.88114.11093.39221.34511.51502.05413.25884.85175.17874.17082.24321.0788
C71.35102.36692.74882.43642.05411.51501.43052.15043.34463.83073.43953.13222.3868
C82.43642.74882.36691.35101.51502.05411.43053.43953.83073.34462.15042.38683.1322
H91.08232.19113.41763.95584.17083.25882.15043.43952.49994.30495.03765.24673.6113
H102.17521.08202.12133.42615.17874.85173.34463.83072.49992.43824.30496.18145.5855
H113.42612.12131.08202.17524.85175.17873.83073.34464.30492.43822.49995.58556.1814
H123.95583.41762.19111.08233.25884.17083.43952.15045.03764.30492.49993.61135.2467
H134.46545.10304.70253.41691.07882.24323.13222.38685.24676.18145.58553.61132.8758
H143.41694.70255.10304.46542.24321.07882.38683.13223.61135.58556.18145.24672.8758

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.626 C1 C2 H10 118.660
C1 C7 C6 149.330 C1 C7 N8 122.285
C2 C1 C7 116.089 C2 C1 H9 120.100
C2 C3 C4 121.626 C2 C3 H11 119.714
C3 C2 H10 119.714 C3 C4 N8 116.089
C3 C4 H12 120.100 C4 C3 H11 118.660
C4 N8 C5 149.330 C4 N8 C7 122.285
C5 C6 C7 91.615 C5 C6 H14 135.187
C5 N8 C7 88.385 C6 C5 N8 91.615
C6 C5 H13 135.187 C6 C7 N8 88.385
C7 C1 H9 123.811 C7 C6 H14 133.199
N8 C4 H12 123.811 N8 C5 H13 133.199
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.152      
2 C -0.109      
3 C -0.109      
4 C -0.152      
5 C -0.154      
6 C -0.154      
7 C 0.085      
8 C 0.085      
9 H 0.103      
10 H 0.106      
11 H 0.106      
12 H 0.103      
13 H 0.122      
14 H 0.122      


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 0.720 0.720
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.641 0.000 0.000
y 0.000 -41.383 0.000
z 0.000 0.000 -40.984
Traceless
 xyz
x -9.458 0.000 0.000
y 0.000 4.429 0.000
z 0.000 0.000 5.028
Polar
3z2-r210.056
x2-y2-9.258
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.258 0.000 0.000
y 0.000 13.951 0.000
z 0.000 0.000 17.095


<r2> (average value of r2) Å2
<r2> 220.127
(<r2>)1/2 14.837