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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-308.423305
Energy at 298.15K-308.428906
HF Energy-308.423305
Nuclear repulsion energy312.404887
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 3234 3125 17.23      
2 A1 3189 3082 23.76      
3 A1 3172 3065 12.94      
4 A1 1700 1642 3.45      
5 A1 1574 1521 1.64      
6 A1 1495 1445 2.48      
7 A1 1444 1395 10.88      
8 A1 1193 1153 0.00      
9 A1 1098 1061 0.02      
10 A1 1067 1031 0.68      
11 A1 976 943 4.60      
12 A1 815 788 0.46      
13 A1 550 531 0.19      
14 A2 953 921 0.00      
15 A2 902 872 0.00      
16 A2 870 841 0.00      
17 A2 780 754 0.00      
18 A2 584 564 0.00      
19 A2 298 288 0.00      
20 B1 902 872 8.68      
21 B1 743 718 114.74      
22 B1 709 685 5.24      
23 B1 364 352 2.60      
24 B1 228 220 13.11      
25 B2 3204 3096 5.09      
26 B2 3180 3073 46.97      
27 B2 3160 3054 0.00      
28 B2 1651 1596 0.21      
29 B2 1466 1416 4.50      
30 B2 1311 1267 3.08      
31 B2 1257 1215 13.51      
32 B2 1096 1059 2.38      
33 B2 1054 1018 0.73      
34 B2 874 845 0.40      
35 B2 658 636 0.74      
36 B2 419 405 4.27      

Unscaled Zero Point Vibrational Energy (zpe) 24084.8 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 23273.2 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
0.16161 0.07310 0.05033

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 0.685 -1.847
C3 0.000 -0.685 -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 0.527
C8 0.000 -0.717 0.527
H9 0.000 2.525 -0.648
H10 0.000 1.223 -2.790
H11 0.000 -1.223 -2.790
H12 0.000 -2.525 -0.648
H13 0.000 -1.442 2.807
H14 0.000 1.442 2.807

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44172.45372.87953.40032.77121.35472.44221.08572.18143.43533.96494.47703.4264
C21.44171.36902.45374.12183.89142.37412.75672.19661.08542.12763.42625.11724.7157
C32.45371.36901.44173.89144.12182.75672.37413.42622.12761.08542.19664.71575.1172
C42.87952.45371.44172.77123.40032.44221.35473.96493.43532.18141.08573.42644.4770
C53.40034.12183.89142.77121.34822.05871.51824.18145.19284.86503.26741.08252.2493
C62.77123.89144.12183.40031.34821.51822.05873.26744.86505.19284.18142.24931.0825
C71.35472.37412.75672.44222.05871.51821.43402.15633.35473.84213.44843.14042.3930
C82.44222.75672.37411.35471.51822.05871.43403.44843.84213.35472.15632.39303.1404
H91.08572.19663.42623.96494.18143.26742.15633.44842.50634.31665.05015.26093.6213
H102.18141.08542.12763.43535.19284.86503.35473.84212.50632.44584.31666.19905.6012
H113.43532.12761.08542.18144.86505.19283.84213.35474.31662.44582.50635.60126.1990
H123.96493.42622.19661.08573.26744.18143.44842.15635.05014.31662.50633.62135.2609
H134.47705.11724.71573.42641.08252.24933.14042.39305.26096.19905.60123.62132.8837
H143.42644.71575.11724.47702.24931.08252.39303.14043.62135.60126.19905.26092.8837

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.591 C1 C2 H10 118.672
C1 C7 C6 149.378 C1 C7 N8 122.243
C2 C1 C7 116.167 C2 C1 H9 120.054
C2 C3 C4 121.591 C2 C3 H11 119.737
C3 C2 H10 119.737 C3 C4 N8 116.167
C3 C4 H12 120.054 C4 C3 H11 118.672
C4 N8 C5 149.378 C4 N8 C7 122.243
C5 C6 C7 91.621 C5 C6 H14 135.179
C5 N8 C7 88.379 C6 C5 N8 91.621
C6 C5 H13 135.179 C6 C7 N8 88.379
C7 C1 H9 123.780 C7 C6 H14 133.201
N8 C4 H12 123.780 N8 C5 H13 133.201
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 -0.241      
2 C -0.200      
3 C -0.200      
4 C -0.241      
5 C -0.209      
6 C -0.209      
7 C 0.064      
8 C 0.064      
9 H 0.194      
10 H 0.191      
11 H 0.191      
12 H 0.194      
13 H 0.201      
14 H 0.201      


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 0.689 0.689
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.021 0.000 0.000
y 0.000 -40.998 0.000
z 0.000 0.000 -40.301
Traceless
 xyz
x -10.371 0.000 0.000
y 0.000 4.663 0.000
z 0.000 0.000 5.709
Polar
3z2-r211.417
x2-y2-10.023
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.129 0.000 0.000
y 0.000 13.472 0.000
z 0.000 0.000 16.397


<r2> (average value of r2) Å2
<r2> 220.909
(<r2>)1/2 14.863