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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-308.222266
Energy at 298.15K-308.227889
HF Energy-308.222266
Nuclear repulsion energy313.547667
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 B1B95/6-31G*
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 3290 3123 13.39      
2 A1 3244 3079 14.46      
3 A1 3228 3065 13.07      
4 A1 1747 1658 2.77      
5 A1 1621 1539 0.71      
6 A1 1542 1463 2.35      
7 A1 1468 1393 10.15      
8 A1 1200 1140 0.02      
9 A1 1130 1072 0.10      
10 A1 1081 1026 0.58      
11 A1 1004 953 3.87      
12 A1 834 791 0.43      
13 A1 548 520 0.11      
14 A2 971 922 0.00      
15 A2 921 874 0.00      
16 A2 884 840 0.00      
17 A2 779 740 0.00      
18 A2 582 552 0.00      
19 A2 295 280 0.00      
20 B1 917 870 7.76      
21 B1 758 719 99.48      
22 B1 731 694 0.24      
23 B1 362 343 1.77      
24 B1 238 226 9.49      
25 B2 3259 3094 2.20      
26 B2 3237 3073 32.31      
27 B2 3215 3052 0.11      
28 B2 1696 1610 0.46      
29 B2 1482 1407 3.48      
30 B2 1320 1253 4.54      
31 B2 1267 1202 11.61      
32 B2 1113 1056 1.55      
33 B2 1056 1003 1.27      
34 B2 877 833 0.53      
35 B2 649 616 0.81      
36 B2 423 402 3.96      

Unscaled Zero Point Vibrational Energy (zpe) 24482.9 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 23241.6 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 B1B95/6-31G*
ABC
0.16220 0.07387 0.05075

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.437 -0.616
C2 0.000 0.683 -1.837
C3 0.000 -0.683 -1.837
C4 0.000 -1.437 -0.616
C5 0.000 -0.671 2.033
C6 0.000 0.671 2.033
C7 0.000 0.713 0.525
C8 0.000 -0.713 0.525
H9 0.000 2.521 -0.645
H10 0.000 1.220 -2.778
H11 0.000 -1.220 -2.778
H12 0.000 -2.521 -0.645
H13 0.000 -1.440 2.795
H14 0.000 1.440 2.795

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43502.44622.87403.38632.75831.35142.43441.08432.17293.42583.95814.46263.4114
C21.43501.36562.44624.10073.87072.36232.74382.19071.08402.12333.41825.09544.6937
C32.44621.36561.43503.87074.10072.74382.36233.41822.12331.08402.19074.69375.0954
C42.87402.44621.43502.75833.38632.43441.35143.95813.42582.17291.08433.41144.4626
C53.38634.10073.87072.75831.34282.04771.50914.16745.17044.84313.25531.08192.2445
C62.75833.87074.10073.38631.34281.50912.04773.25534.84315.17044.16742.24451.0819
C71.35142.36232.74382.43442.04771.50911.42662.15343.34213.82773.43953.12892.3836
C82.43442.74382.36231.35141.50912.04771.42663.43953.82773.34212.15342.38363.1289
H91.08432.19073.41823.95814.16743.25532.15343.43952.49834.30675.04195.24643.6062
H102.17291.08402.12333.42585.17044.84313.34213.82772.49832.44094.30676.17585.5778
H113.42582.12331.08402.17294.84315.17043.82773.34214.30672.44092.49835.57786.1758
H123.95813.41822.19071.08433.25534.16743.43952.15345.04194.30672.49833.60625.2464
H134.46265.09544.69373.41141.08192.24453.12892.38365.24646.17585.57783.60622.8799
H143.41144.69375.09544.46262.24451.08192.38363.12893.60625.57786.17585.24642.8799

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.709 C1 C2 H10 118.556
C1 C7 C6 149.212 C1 C7 N8 122.379
C2 C1 C7 115.912 C2 C1 H9 120.180
C2 C3 C4 121.709 C2 C3 H11 119.735
C3 C2 H10 119.735 C3 C4 N8 115.912
C3 C4 H12 120.180 C4 C3 H11 118.556
C4 N8 C5 149.212 C4 N8 C7 122.379
C5 C6 C7 91.590 C5 C6 H14 135.262
C5 N8 C7 88.410 C6 C5 N8 91.590
C6 C5 H13 135.262 C6 C7 N8 88.410
C7 C1 H9 123.908 C7 C6 H14 133.148
N8 C4 H12 123.908 N8 C5 H13 133.148
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.245      
2 C -0.166      
3 C -0.166      
4 C -0.245      
5 C -0.167      
6 C -0.167      
7 C 0.095      
8 C 0.095      
9 H 0.159      
10 H 0.154      
11 H 0.154      
12 H 0.159      
13 H 0.170      
14 H 0.170      


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 0.690 0.690
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.485 0.000 0.000
y 0.000 -40.059 0.000
z 0.000 0.000 -39.310
Traceless
 xyz
x -9.800 0.000 0.000
y 0.000 4.339 0.000
z 0.000 0.000 5.461
Polar
3z2-r210.923
x2-y2-9.426
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.032 0.000 0.000
y 0.000 12.817 0.000
z 0.000 0.000 15.505


<r2> (average value of r2) Å2
<r2> 218.638
(<r2>)1/2 14.786