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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: PBE1PBE/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 PBE1PBE/6-311G**
 hartrees
Energy at 0K-308.058447
Energy at 298.15K-308.064126
HF Energy-308.058447
Nuclear repulsion energy313.325721
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/6-311G**
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 3259 3127 8.83      
2 A1 3218 3088 11.67      
3 A1 3203 3073 9.82      
4 A1 1730 1660 3.41      
5 A1 1596 1531 1.00      
6 A1 1527 1465 2.85      
7 A1 1449 1390 11.75      
8 A1 1188 1140 0.01      
9 A1 1118 1073 0.04      
10 A1 1065 1022 1.01      
11 A1 993 953 5.28      
12 A1 829 795 0.49      
13 A1 551 529 0.17      
14 A2 977 937 0.00      
15 A2 932 894 0.00      
16 A2 886 850 0.00      
17 A2 779 748 0.00      
18 A2 586 562 0.00      
19 A2 295 283 0.00      
20 B1 923 886 7.92      
21 B1 754 723 118.07      
22 B1 725 696 0.04      
23 B1 360 346 3.10      
24 B1 233 223 14.20      
25 B2 3228 3097 1.30      
26 B2 3211 3080 25.92      
27 B2 3190 3061 0.01      
28 B2 1680 1611 0.45      
29 B2 1466 1406 4.37      
30 B2 1305 1252 5.89      
31 B2 1254 1203 12.93      
32 B2 1105 1060 2.46      
33 B2 1057 1014 0.55      
34 B2 880 845 0.76      
35 B2 656 629 0.85      
36 B2 424 407 4.46      

Unscaled Zero Point Vibrational Energy (zpe) 24314.8 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 23327.6 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 PBE1PBE/6-311G**
ABC
0.16216 0.07370 0.05067

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.437 -0.617
C2 0.000 0.683 -1.839
C3 0.000 -0.683 -1.839
C4 0.000 -1.437 -0.617
C5 0.000 -0.672 2.036
C6 0.000 0.672 2.036
C7 0.000 0.714 0.525
C8 0.000 -0.714 0.525
H9 0.000 2.522 -0.645
H10 0.000 1.220 -2.782
H11 0.000 -1.220 -2.782
H12 0.000 -2.522 -0.645
H13 0.000 -1.441 2.798
H14 0.000 1.441 2.798

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43632.44692.87413.38932.76091.35172.43541.08502.17553.42723.95884.46593.4148
C21.43631.36552.44694.10533.87522.36452.74602.19251.08482.12343.41965.10034.6987
C32.44691.36551.43633.87524.10532.74602.36453.41962.12341.08482.19254.69875.1003
C42.87412.44691.43632.76093.38932.43541.35173.95883.42722.17551.08503.41484.4659
C53.38934.10533.87522.76091.34472.05061.51154.17035.17594.84863.25721.08232.2466
C62.76093.87524.10533.38931.34471.51152.05063.25724.84865.17594.17032.24661.0823
C71.35172.36452.74602.43542.05061.51151.42792.15353.34523.83073.44083.13212.3863
C82.43542.74602.36451.35171.51152.05061.42793.44083.83073.34522.15352.38633.1321
H91.08502.19253.41963.95884.17033.25722.15353.44082.50154.30865.04335.24973.6088
H102.17551.08482.12343.42725.17594.84863.34523.83072.50152.44014.30866.18165.5838
H113.42722.12341.08482.17554.84865.17593.83073.34524.30862.44012.50155.58386.1816
H123.95883.41962.19251.08503.25724.17033.44082.15355.04334.30862.50153.60885.2497
H134.46595.10034.69873.41481.08232.24663.13212.38635.24976.18165.58383.60882.8822
H143.41484.69875.10034.46592.24661.08232.38633.13213.60885.58386.18165.24972.8822

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.679 C1 C2 H10 118.628
C1 C7 C6 149.237 C1 C7 N8 122.341
C2 C1 C7 115.980 C2 C1 H9 120.176
C2 C3 C4 121.679 C2 C3 H11 119.692
C3 C2 H10 119.692 C3 C4 N8 115.980
C3 C4 H12 120.176 C4 C3 H11 118.628
C4 N8 C5 149.237 C4 N8 C7 122.341
C5 C6 C7 91.577 C5 C6 H14 135.257
C5 N8 C7 88.423 C6 C5 N8 91.577
C6 C5 H13 135.257 C6 C7 N8 88.423
C7 C1 H9 123.844 C7 C6 H14 133.166
N8 C4 H12 123.844 N8 C5 H13 133.166
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.098      
2 C -0.114      
3 C -0.114      
4 C -0.098      
5 C -0.092      
6 C -0.092      
7 C -0.002      
8 C -0.002      
9 H 0.100      
10 H 0.106      
11 H 0.106      
12 H 0.100      
13 H 0.101      
14 H 0.101      


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 0.702 0.702
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.789 0.000 0.000
y 0.000 -40.518 0.000
z 0.000 0.000 -39.824
Traceless
 xyz
x -10.618 0.000 0.000
y 0.000 4.789 0.000
z 0.000 0.000 5.830
Polar
3z2-r211.659
x2-y2-10.272
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.268 0.000 0.000
y 0.000 13.452 0.000
z 0.000 0.000 16.266


<r2> (average value of r2) Å2
<r2> 219.423
(<r2>)1/2 14.813