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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3LYP/6-311G**

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/6-311G**
 hartrees
Energy at 0K-308.434505
Energy at 298.15K-308.440149
HF Energy-308.434505
Nuclear repulsion energy312.454260
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/6-311G**
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 3235 3128 11.54      
2 A1 3189 3083 16.69      
3 A1 3173 3068 10.98      
4 A1 1697 1640 3.27      
5 A1 1569 1517 1.69      
6 A1 1491 1442 2.60      
7 A1 1438 1390 10.88      
8 A1 1189 1149 0.00      
9 A1 1097 1060 0.03      
10 A1 1063 1028 0.59      
11 A1 974 942 4.67      
12 A1 815 788 0.47      
13 A1 549 531 0.20      
14 A2 970 938 0.00      
15 A2 922 891 0.00      
16 A2 881 852 0.00      
17 A2 779 753 0.00      
18 A2 584 565 0.00      
19 A2 298 288 0.00      
20 B1 917 886 7.97      
21 B1 749 724 110.33      
22 B1 718 694 2.17      
23 B1 363 351 2.82      
24 B1 229 221 12.74      
25 B2 3205 3099 2.38      
26 B2 3181 3076 34.42      
27 B2 3162 3057 0.00      
28 B2 1648 1594 0.23      
29 B2 1459 1410 4.45      
30 B2 1305 1261 3.24      
31 B2 1252 1211 13.31      
32 B2 1094 1057 2.53      
33 B2 1052 1017 0.70      
34 B2 873 844 0.47      
35 B2 658 636 0.72      
36 B2 418 405 4.25      

Unscaled Zero Point Vibrational Energy (zpe) 24098.0 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 23298.0 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/6-311G**
ABC
0.16159 0.07313 0.05035

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.440 -0.619
C2 0.000 0.684 -1.847
C3 0.000 -0.684 -1.847
C4 0.000 -1.440 -0.619
C5 0.000 -0.674 2.044
C6 0.000 0.674 2.044
C7 0.000 0.717 0.526
C8 0.000 -0.717 0.526
H9 0.000 2.524 -0.648
H10 0.000 1.222 -2.788
H11 0.000 -1.222 -2.788
H12 0.000 -2.524 -0.648
H13 0.000 -1.442 2.806
H14 0.000 1.442 2.806

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44162.45382.88023.40022.77091.35462.44221.08462.18023.43433.96454.47563.4246
C21.44161.36902.45384.12113.89072.37332.75602.19601.08442.12673.42555.11514.7135
C32.45381.36901.44163.89074.12112.75602.37333.42552.12671.08442.19604.71355.1151
C42.88022.45381.44162.77093.40022.44221.35463.96453.43432.18021.08463.42464.4756
C53.40024.12113.89072.77091.34832.05871.51824.18035.19114.86333.26621.08112.2485
C62.77093.89074.12113.40021.34831.51822.05873.26624.86335.19114.18032.24851.0811
C71.35462.37332.75602.44222.05871.51821.43382.15523.35303.84033.44733.13902.3916
C82.44222.75602.37331.35461.51822.05871.43383.44733.84033.35302.15522.39163.1390
H91.08462.19603.42553.96454.18033.26622.15523.44732.50544.31515.04865.25853.6190
H102.18021.08442.12673.43435.19114.86333.35303.84032.50542.44484.31516.19585.5982
H113.43432.12671.08442.18024.86335.19113.84033.35304.31512.44482.50545.59826.1958
H123.96453.42552.19601.08463.26624.18033.44732.15525.04864.31512.50543.61905.2585
H134.47565.11514.71353.42461.08112.24853.13902.39165.25856.19585.59823.61902.8830
H143.42464.71355.11514.47562.24851.08112.39163.13903.61905.59826.19585.25852.8830

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.610 C1 C2 H10 118.653
C1 C7 C6 149.345 C1 C7 N8 122.269
C2 C1 C7 116.122 C2 C1 H9 120.094
C2 C3 C4 121.610 C2 C3 H11 119.738
C3 C2 H10 119.738 C3 C4 N8 116.122
C3 C4 H12 120.094 C4 C3 H11 118.653
C4 N8 C5 149.345 C4 N8 C7 122.269
C5 C6 C7 91.614 C5 C6 H14 135.217
C5 N8 C7 88.386 C6 C5 N8 91.614
C6 C5 H13 135.217 C6 C7 N8 88.386
C7 C1 H9 123.784 C7 C6 H14 133.169
N8 C4 H12 123.784 N8 C5 H13 133.169
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.093      
2 C -0.102      
3 C -0.102      
4 C -0.093      
5 C -0.087      
6 C -0.087      
7 C 0.001      
8 C 0.001      
9 H 0.091      
10 H 0.094      
11 H 0.094      
12 H 0.091      
13 H 0.096      
14 H 0.096      


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 0.700 0.700
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.773 0.000 0.000
y 0.000 -41.148 0.000
z 0.000 0.000 -40.486
Traceless
 xyz
x -9.956 0.000 0.000
y 0.000 4.481 0.000
z 0.000 0.000 5.475
Polar
3z2-r210.950
x2-y2-9.625
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.247 0.000 0.000
y 0.000 13.555 0.000
z 0.000 0.000 16.465


<r2> (average value of r2) Å2
<r2> 220.853
(<r2>)1/2 14.861