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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: PBE1PBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBE1PBE/6-31+G**
 hartrees
Energy at 0K-308.011185
Energy at 298.15K-308.016831
HF Energy-308.011185
Nuclear repulsion energy312.709284
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 PBE1PBE/6-31+G**
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 3280 3134 7.90      
2 A1 3235 3090 10.81      
3 A1 3220 3076 9.19      
4 A1 1733 1655 1.57      
5 A1 1600 1529 3.06      
6 A1 1533 1464 3.62      
7 A1 1455 1390 9.92      
8 A1 1191 1138 0.00      
9 A1 1126 1076 0.04      
10 A1 1073 1025 1.33      
11 A1 997 953 5.93      
12 A1 831 794 0.27      
13 A1 550 525 0.18      
14 A2 977 934 0.00      
15 A2 924 883 0.00      
16 A2 883 844 0.00      
17 A2 770 735 0.00      
18 A2 583 557 0.00      
19 A2 294 281 0.00      
20 B1 924 883 9.08      
21 B1 753 719 139.02      
22 B1 722 690 1.19      
23 B1 361 345 2.95      
24 B1 232 221 13.98      
25 B2 3250 3105 0.92      
26 B2 3228 3084 24.69      
27 B2 3208 3065 0.01      
28 B2 1682 1607 0.54      
29 B2 1469 1403 3.23      
30 B2 1310 1252 6.52      
31 B2 1260 1203 11.54      
32 B2 1107 1058 2.85      
33 B2 1058 1011 0.60      
34 B2 879 840 0.76      
35 B2 654 625 0.79      
36 B2 426 407 4.55      

Unscaled Zero Point Vibrational Energy (zpe) 24389.3 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 23299.1 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 PBE1PBE/6-31+G**
ABC
0.16130 0.07348 0.05048

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.441 -0.618
C2 0.000 0.685 -1.843
C3 0.000 -0.685 -1.843
C4 0.000 -1.441 -0.618
C5 0.000 -0.674 2.039
C6 0.000 0.674 2.039
C7 0.000 0.715 0.527
C8 0.000 -0.715 0.527
H9 0.000 2.527 -0.647
H10 0.000 1.224 -2.786
H11 0.000 -1.224 -2.786
H12 0.000 -2.527 -0.647
H13 0.000 -1.444 2.802
H14 0.000 1.444 2.802

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43962.45422.88243.39652.76561.35602.44171.08642.17933.43563.96854.47463.4204
C21.43961.37072.45424.11353.88232.37072.75332.19651.08602.12933.42825.11024.7071
C32.45421.37071.43963.88234.11352.75332.37073.42822.12931.08602.19654.70715.1102
C42.88242.45421.43962.76563.39652.44171.35603.96853.43562.17931.08643.42044.4746
C53.39654.11353.88232.76561.34882.05351.51244.17885.18544.85673.26271.08382.2515
C62.76563.88234.11353.39651.34881.51242.05353.26274.85675.18544.17882.25151.0838
C71.35602.37072.75332.44172.05351.51241.43052.15893.35253.83933.44833.13652.3889
C82.44172.75332.37071.35601.51242.05351.43053.44833.83933.35252.15892.38893.1365
H91.08642.19653.42823.96854.17883.26272.15893.44832.50584.31835.05445.25963.6150
H102.17931.08602.12933.43565.18544.85673.35253.83932.50582.44724.31836.19275.5932
H113.43562.12931.08602.17934.85675.18543.83933.35254.31832.44722.50585.59326.1927
H123.96853.42822.19651.08643.26274.17883.44832.15895.05444.31832.50583.61505.2596
H134.47465.11024.70713.42041.08382.25153.13652.38895.25966.19275.59323.61502.8876
H143.42044.70715.11024.47462.25151.08382.38893.13653.61505.59326.19275.25962.8876

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.671 C1 C2 H10 118.620
C1 C7 C6 149.179 C1 C7 N8 122.368
C2 C1 C7 115.961 C2 C1 H9 120.170
C2 C3 C4 121.671 C2 C3 H11 119.709
C3 C2 H10 119.709 C3 C4 N8 115.961
C3 C4 H12 120.170 C4 C3 H11 118.620
C4 N8 C5 149.179 C4 N8 C7 122.368
C5 C6 C7 91.548 C5 C6 H14 135.229
C5 N8 C7 88.452 C6 C5 N8 91.548
C6 C5 H13 135.229 C6 C7 N8 88.452
C7 C1 H9 123.869 C7 C6 H14 133.223
N8 C4 H12 123.869 N8 C5 H13 133.223
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.156      
2 C -0.078      
3 C -0.078      
4 C -0.156      
5 C -0.175      
6 C -0.175      
7 C -0.087      
8 C -0.087      
9 H 0.165      
10 H 0.157      
11 H 0.157      
12 H 0.165      
13 H 0.174      
14 H 0.174      


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 0.679 0.679
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.430 0.000 0.000
y 0.000 -40.796 0.000
z 0.000 0.000 -40.570
Traceless
 xyz
x -10.747 0.000 0.000
y 0.000 5.204 0.000
z 0.000 0.000 5.543
Polar
3z2-r211.086
x2-y2-10.634
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.335 0.000 0.000
y 0.000 14.160 0.000
z 0.000 0.000 17.157


<r2> (average value of r2) Å2
<r2> 220.473
(<r2>)1/2 14.848