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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3PW91/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/TZVP
 hartrees
Energy at 0K-308.335230
Energy at 298.15K-308.340830
HF Energy-308.335230
Nuclear repulsion energy313.345611
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 B3PW91/TZVP
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 3251 3135 7.49      
2 A1 3207 3092 10.59      
3 A1 3192 3078 8.69      
4 A1 1710 1649 2.46      
5 A1 1581 1525 2.60      
6 A1 1507 1453 3.09      
7 A1 1443 1392 10.98      
8 A1 1191 1149 0.00      
9 A1 1107 1068 0.01      
10 A1 1067 1029 1.04      
11 A1 985 950 5.71      
12 A1 822 792 0.39      
13 A1 550 530 0.19      
14 A2 943 910 0.00      
15 A2 922 889 0.00      
16 A2 877 846 0.00      
17 A2 742 715 0.00      
18 A2 560 540 0.00      
19 A2 291 280 0.00      
20 B1 909 877 10.19      
21 B1 748 721 122.15      
22 B1 718 693 0.65      
23 B1 357 344 2.15      
24 B1 227 219 12.52      
25 B2 3221 3106 1.06      
26 B2 3199 3085 23.95      
27 B2 3180 3066 0.01      
28 B2 1660 1600 0.41      
29 B2 1461 1409 4.17      
30 B2 1306 1259 4.80      
31 B2 1255 1210 13.07      
32 B2 1100 1061 2.87      
33 B2 1056 1018 0.60      
34 B2 875 844 0.57      
35 B2 656 633 0.77      
36 B2 421 406 4.45      

Unscaled Zero Point Vibrational Energy (zpe) 24147.2 cm-1
Scaled (by 0.9643) Zero Point Vibrational Energy (zpe) 23285.1 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 B3PW91/TZVP
ABC
0.16229 0.07366 0.05067

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/TZVP

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 2.521 -0.646
H10 0.000 1.220 -2.781
H11 0.000 -1.220 -2.781
H12 0.000 -2.521 -0.646
H13 0.000 -1.440 2.798
H14 0.000 1.440 2.798

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43612.44672.87353.38942.76121.35092.43541.08442.17473.42663.95774.46513.4146
C21.43611.36552.44674.10563.87552.36402.74592.19151.08422.12313.41865.09984.6983
C32.44671.36551.43613.87554.10562.74592.36403.41862.12311.08422.19154.69835.0998
C42.87352.44671.43612.76123.38942.43541.35093.95773.42662.17471.08443.41464.4651
C53.38944.10563.87552.76121.34472.05151.51234.17015.17554.84813.25731.08142.2456
C62.76123.87554.10563.38941.34471.51232.05153.25734.84815.17554.17012.24561.0814
C71.35092.36402.74592.43542.05151.51231.42902.15233.34393.82993.44043.13212.3861
C82.43542.74592.36401.35091.51232.05151.42903.44043.82993.34392.15232.38613.1321
H91.08442.19153.41863.95774.17013.25732.15233.44042.50004.30735.04165.24853.6090
H102.17471.08422.12313.42665.17554.84813.34393.82992.50002.44034.30736.18045.5828
H113.42662.12311.08422.17474.84815.17553.82993.34394.30732.44032.50005.58286.1804
H123.95773.41862.19151.08443.25734.17013.44042.15235.04164.30732.50003.60905.2485
H134.46515.09984.69833.41461.08142.24563.13212.38615.24856.18045.58283.60902.8805
H143.41464.69835.09984.46512.24561.08142.38613.13213.60905.58286.18045.24852.8805

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.671 C1 C2 H10 118.614
C1 C7 C6 149.274 C1 C7 N8 122.323
C2 C1 C7 116.006 C2 C1 H9 120.149
C2 C3 C4 121.671 C2 C3 H11 119.715
C3 C2 H10 119.715 C3 C4 N8 116.006
C3 C4 H12 120.149 C4 C3 H11 118.614
C4 N8 C5 149.274 C4 N8 C7 122.323
C5 C6 C7 91.597 C5 C6 H14 135.244
C5 N8 C7 88.403 C6 C5 N8 91.597
C6 C5 H13 135.244 C6 C7 N8 88.403
C7 C1 H9 123.846 C7 C6 H14 133.159
N8 C4 H12 123.846 N8 C5 H13 133.159
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.124      
2 C -0.122      
3 C -0.122      
4 C -0.124      
5 C -0.179      
6 C -0.179      
7 C 0.068      
8 C 0.068      
9 H 0.118      
10 H 0.114      
11 H 0.114      
12 H 0.118      
13 H 0.125      
14 H 0.125      


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 0.665 0.665
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.808 0.000 0.000
y 0.000 -40.734 0.000
z 0.000 0.000 -40.305
Traceless
 xyz
x -10.288 0.000 0.000
y 0.000 4.822 0.000
z 0.000 0.000 5.466
Polar
3z2-r210.932
x2-y2-10.073
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.824 0.000 0.000
y 0.000 13.876 0.000
z 0.000 0.000 16.756


<r2> (average value of r2) Å2
<r2> 219.576
(<r2>)1/2 14.818