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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: mPW1PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-311G**
 hartrees
Energy at 0K-308.356287
Energy at 298.15K-308.361979
HF Energy-308.356287
Nuclear repulsion energy313.426548
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 mPW1PW91/6-311G**
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 3265 3124 9.57      
2 A1 3223 3083 12.40      
3 A1 3207 3068 10.56      
4 A1 1729 1654 3.38      
5 A1 1595 1526 1.17      
6 A1 1524 1458 2.94      
7 A1 1451 1388 11.53      
8 A1 1192 1140 0.01      
9 A1 1117 1069 0.05      
10 A1 1069 1023 0.89      
11 A1 992 949 5.32      
12 A1 828 792 0.51      
13 A1 552 528 0.18      
14 A2 980 938 0.00      
15 A2 936 895 0.00      
16 A2 888 850 0.00      
17 A2 780 747 0.00      
18 A2 587 561 0.00      
19 A2 296 283 0.00      
20 B1 926 886 7.86      
21 B1 756 724 117.76      
22 B1 728 696 0.01      
23 B1 362 346 3.17      
24 B1 233 223 14.22      
25 B2 3234 3094 1.60      
26 B2 3215 3076 27.86      
27 B2 3194 3056 0.03      
28 B2 1679 1606 0.45      
29 B2 1469 1405 4.39      
30 B2 1309 1252 5.46      
31 B2 1258 1204 12.71      
32 B2 1106 1058 2.53      
33 B2 1059 1013 0.58      
34 B2 882 843 0.72      
35 B2 658 629 0.83      
36 B2 424 406 4.49      

Unscaled Zero Point Vibrational Energy (zpe) 24350.5 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 23296.2 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 mPW1PW91/6-311G**
ABC
0.16231 0.07372 0.05069

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.437 -0.617
C2 0.000 0.682 -1.839
C3 0.000 -0.682 -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 2.520 -0.645
H10 0.000 1.219 -2.780
H11 0.000 -1.219 -2.780
H12 0.000 -2.520 -0.645
H13 0.000 -1.440 2.797
H14 0.000 1.440 2.797

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43612.44622.87313.38852.76051.35102.43461.08352.17423.42523.95634.46353.4134
C21.43611.36492.44624.10463.87472.36382.74522.19101.08332.12163.41745.09814.6969
C32.44621.36491.43613.87474.10462.74522.36383.41742.12161.08332.19104.69695.0981
C42.87312.44621.43612.76053.38852.43461.35103.95633.42522.17421.08353.41344.4635
C53.38854.10463.87472.76051.34412.05041.51174.16835.17384.84673.25591.08072.2445
C62.76053.87474.10463.38851.34411.51172.05043.25594.84675.17384.16832.24451.0807
C71.35102.36382.74522.43462.05041.51171.42782.15163.34313.82853.43873.13042.3850
C82.43462.74522.36381.35101.51172.05041.42783.43873.82853.34312.15162.38503.1304
H91.08352.19103.41743.95634.16833.25592.15163.43872.49984.30535.03945.24613.6072
H102.17421.08332.12163.42525.17384.84673.34313.82852.49982.43824.30536.17795.5810
H113.42522.12161.08332.17424.84675.17383.82853.34314.30532.43822.49985.58106.1779
H123.95633.41742.19101.08353.25594.16833.43872.15165.03944.30532.49983.60725.2461
H134.46355.09814.69693.41341.08072.24453.13042.38505.24616.17795.58103.60722.8792
H143.41344.69695.09814.46352.24451.08072.38503.13043.60725.58106.17795.24612.8792

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.676 C1 C2 H10 118.631
C1 C7 C6 149.247 C1 C7 N8 122.338
C2 C1 C7 115.986 C2 C1 H9 120.174
C2 C3 C4 121.676 C2 C3 H11 119.693
C3 C2 H10 119.693 C3 C4 N8 115.986
C3 C4 H12 120.174 C4 C3 H11 118.631
C4 N8 C5 149.247 C4 N8 C7 122.338
C5 C6 C7 91.586 C5 C6 H14 135.252
C5 N8 C7 88.414 C6 C5 N8 91.586
C6 C5 H13 135.252 C6 C7 N8 88.414
C7 C1 H9 123.840 C7 C6 H14 133.162
N8 C4 H12 123.840 N8 C5 H13 133.162
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.097      
2 C -0.113      
3 C -0.113      
4 C -0.097      
5 C -0.088      
6 C -0.088      
7 C -0.002      
8 C -0.002      
9 H 0.098      
10 H 0.104      
11 H 0.104      
12 H 0.098      
13 H 0.098      
14 H 0.098      


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 -50.683 0.000 0.000
y 0.000 -40.457 0.000
z 0.000 0.000 -39.767
Traceless
 xyz
x -10.571 0.000 0.000
y 0.000 4.768 0.000
z 0.000 0.000 5.803
Polar
3z2-r211.606
x2-y2-10.226
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 13.430 0.000
z 0.000 0.000 16.233


<r2> (average value of r2) Å2
<r2> 219.267
(<r2>)1/2 14.808