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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: PBEPBE/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 PBEPBE/6-311G*
 hartrees
Energy at 0K-308.022040
Energy at 298.15K-308.027410
HF Energy-308.022040
Nuclear repulsion energy311.098637
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 PBEPBE/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 3162 3129 18.84      
2 A1 3123 3091 23.12      
3 A1 3106 3074 10.47      
4 A1 1661 1644 3.04      
5 A1 1526 1511 1.46      
6 A1 1477 1461 1.48      
7 A1 1403 1388 9.17      
8 A1 1159 1146 0.00      
9 A1 1079 1068 0.02      
10 A1 1032 1021 1.43      
11 A1 968 958 4.03      
12 A1 799 790 0.20      
13 A1 535 529 0.16      
14 A2 908 899 0.00      
15 A2 857 848 0.00      
16 A2 825 816 0.00      
17 A2 750 742 0.00      
18 A2 562 556 0.00      
19 A2 284 281 0.00      
20 B1 861 852 7.38      
21 B1 710 703 111.82      
22 B1 680 673 4.09      
23 B1 346 342 2.39      
24 B1 218 216 13.30      
25 B2 3131 3099 5.87      
26 B2 3114 3082 45.09      
27 B2 3095 3063 0.13      
28 B2 1604 1588 0.15      
29 B2 1421 1406 3.76      
30 B2 1266 1253 3.81      
31 B2 1212 1199 14.20      
32 B2 1072 1061 1.97      
33 B2 1021 1010 0.87      
34 B2 847 838 0.37      
35 B2 636 629 0.94      
36 B2 408 404 4.18      

Unscaled Zero Point Vibrational Energy (zpe) 23427.9 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 23184.2 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 PBEPBE/6-311G*
ABC
0.15990 0.07266 0.04996

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.447 -0.622
C2 0.000 0.689 -1.853
C3 0.000 -0.689 -1.853
C4 0.000 -1.447 -0.622
C5 0.000 -0.679 2.050
C6 0.000 0.679 2.050
C7 0.000 0.720 0.532
C8 0.000 -0.720 0.532
H9 0.000 2.541 -0.653
H10 0.000 1.232 -2.803
H11 0.000 -1.232 -2.803
H12 0.000 -2.541 -0.653
H13 0.000 -1.455 2.817
H14 0.000 1.455 2.817

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44552.46502.89403.41492.78021.36342.45541.09442.19093.45403.98804.50023.4394
C21.44551.37752.46504.13563.90282.38462.76972.20681.09402.14263.44545.13874.7325
C32.46501.37751.44553.90284.13562.76972.38463.44542.14261.09402.20684.73255.1387
C42.89402.46501.44552.78023.41492.45541.36343.98803.45402.19091.09443.43944.5002
C53.41494.13563.90282.78021.35872.06521.51894.20435.21534.88383.28201.09122.2683
C62.78023.90284.13563.41491.35871.51892.06523.28204.88385.21534.20432.26831.0912
C71.36342.38462.76972.45542.06521.51891.44092.17193.37313.86363.46983.15562.4008
C82.45542.76972.38461.36341.51892.06521.44093.46983.86363.37312.17192.40083.1556
H91.09442.20683.44543.98804.20433.28202.17193.46982.51674.34225.08185.29263.6361
H102.19091.09402.14263.45405.21534.88383.37313.86362.51672.46394.34226.22915.6241
H113.45402.14261.09402.19094.88385.21533.86363.37314.34222.46392.51675.62416.2291
H123.98803.44542.20681.09443.28204.20433.46982.17195.08184.34222.51673.63615.2926
H134.50025.13874.73253.43941.09122.26833.15562.40085.29266.22915.62413.63612.9104
H143.43944.73255.13874.50022.26831.09122.40083.15563.63615.62416.22915.29262.9104

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.637 C1 C2 H10 118.595
C1 C7 C6 149.350 C1 C7 N8 122.200
C2 C1 C7 116.164 C2 C1 H9 120.022
C2 C3 C4 121.637 C2 C3 H11 119.768
C3 C2 H10 119.768 C3 C4 N8 116.164
C3 C4 H12 120.022 C4 C3 H11 118.595
C4 N8 C5 149.350 C4 N8 C7 122.200
C5 C6 C7 91.550 C5 C6 H14 135.319
C5 N8 C7 88.450 C6 C5 N8 91.550
C6 C5 H13 135.319 C6 C7 N8 88.450
C7 C1 H9 123.814 C7 C6 H14 133.131
N8 C4 H12 123.814 N8 C5 H13 133.131
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.236      
2 C -0.197      
3 C -0.197      
4 C -0.236      
5 C -0.206      
6 C -0.206      
7 C 0.074      
8 C 0.074      
9 H 0.188      
10 H 0.187      
11 H 0.187      
12 H 0.188      
13 H 0.191      
14 H 0.191      


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 0.647 0.647
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.986 0.000 0.000
y 0.000 -40.857 0.000
z 0.000 0.000 -40.054
Traceless
 xyz
x -10.531 0.000 0.000
y 0.000 4.663 0.000
z 0.000 0.000 5.868
Polar
3z2-r211.736
x2-y2-10.129
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.197 0.000 0.000
y 0.000 13.739 0.000
z 0.000 0.000 17.082


<r2> (average value of r2) Å2
<r2> 222.332
(<r2>)1/2 14.911