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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3LYPultrafine/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 B3LYPultrafine/6-31G*
 hartrees
Energy at 0K-308.360320
Energy at 298.15K-308.365925
HF Energy-308.360320
Nuclear repulsion energy311.991457
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 B3LYPultrafine/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 3259 3122 15.46      
2 A1 3210 3075 19.12      
3 A1 3194 3060 13.55      
4 A1 1715 1643 2.76      
5 A1 1590 1523 1.18      
6 A1 1510 1446 1.93      
7 A1 1456 1395 9.59      
8 A1 1198 1148 0.01      
9 A1 1108 1062 0.11      
10 A1 1078 1032 0.38      
11 A1 985 943 3.45      
12 A1 820 786 0.35      
13 A1 550 527 0.16      
14 A2 959 918 0.00      
15 A2 906 868 0.00      
16 A2 873 836 0.00      
17 A2 785 752 0.00      
18 A2 583 558 0.00      
19 A2 300 287 0.00      
20 B1 906 868 7.44      
21 B1 752 721 88.39      
22 B1 724 694 2.48      
23 B1 367 351 1.56      
24 B1 237 227 8.17      
25 B2 3229 3094 2.92      
26 B2 3203 3068 39.47      
27 B2 3182 3048 0.06      
28 B2 1664 1594 0.24      
29 B2 1473 1411 3.37      
30 B2 1318 1263 2.44      
31 B2 1263 1210 11.72      
32 B2 1100 1054 1.64      
33 B2 1052 1007 1.40      
34 B2 873 837 0.30      
35 B2 656 628 0.67      
36 B2 422 404 3.77      

Unscaled Zero Point Vibrational Energy (zpe) 24249.2 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 23230.7 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 B3LYPultrafine/6-31G*
ABC
0.16095 0.07298 0.05021

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/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 2.530 -0.649
H10 0.000 1.226 -2.792
H11 0.000 -1.226 -2.792
H12 0.000 -2.530 -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
C11.44362.45862.88573.40502.77421.35772.44671.08702.18333.44163.97254.48333.4295
C21.44361.37262.45864.12653.89542.37762.76112.19961.08682.13253.43255.12334.7203
C32.45861.37261.44363.89544.12652.76112.37763.43252.13251.08682.19964.72035.1233
C42.88572.45861.44362.77423.40502.44671.35773.97253.44162.18331.08703.42954.4833
C53.40504.12653.89542.77421.35052.06041.51874.18745.19884.86973.27141.08412.2534
C62.77423.89544.12653.40501.35051.51872.06043.27144.86975.19884.18742.25341.0841
C71.35772.37762.76112.44672.06041.51871.43572.16053.35913.84773.45413.14372.3946
C82.44672.76112.37761.35771.51872.06041.43573.45413.84773.35912.16052.39463.1437
H91.08702.19963.43253.97254.18743.27142.16053.45412.50844.32455.05905.26853.6248
H102.18331.08682.13253.44165.19884.86973.35913.84772.50842.45284.32456.20635.6063
H113.44162.13251.08682.18334.86975.19883.84773.35914.32452.45282.50845.60636.2063
H123.97253.43252.19961.08703.27144.18743.45412.16055.05904.32452.50843.62485.2685
H134.48335.12334.72033.42951.08412.25343.14372.39465.26856.20635.60633.62482.8896
H143.42954.72035.12334.48332.25341.08412.39463.14373.62485.60636.20635.26852.8896

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.606 C1 C2 H10 118.591
C1 C7 C6 149.329 C1 C7 N8 122.277
C2 C1 C7 116.117 C2 C1 H9 120.068
C2 C3 C4 121.606 C2 C3 H11 119.802
C3 C2 H10 119.802 C3 C4 N8 116.117
C3 C4 H12 120.068 C4 C3 H11 118.591
C4 N8 C5 149.329 C4 N8 C7 122.277
C5 C6 C7 91.606 C5 C6 H14 135.222
C5 N8 C7 88.394 C6 C5 N8 91.606
C6 C5 H13 135.222 C6 C7 N8 88.394
C7 C1 H9 123.815 C7 C6 H14 133.172
N8 C4 H12 123.815 N8 C5 H13 133.172
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/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-r210.293
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 12.950 0.000
z 0.000 0.000 15.759


<r2> (average value of r2) Å2
<r2> 220.875
(<r2>)1/2 14.862