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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-308.033259
Energy at 298.15K-308.038678
HF Energy-308.033259
Nuclear repulsion energy311.139183
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 3167 3138 12.71      
2 A1 3127 3098 15.97      
3 A1 3111 3082 8.89      
4 A1 1659 1643 2.89      
5 A1 1522 1508 1.50      
6 A1 1473 1459 1.59      
7 A1 1396 1384 9.09      
8 A1 1153 1143 0.00      
9 A1 1077 1067 0.01      
10 A1 1028 1019 1.24      
11 A1 966 957 4.10      
12 A1 798 791 0.21      
13 A1 534 529 0.17      
14 A2 926 918 0.00      
15 A2 877 869 0.00      
16 A2 839 832 0.00      
17 A2 749 742 0.00      
18 A2 563 558 0.00      
19 A2 283 281 0.00      
20 B1 876 868 6.73      
21 B1 717 711 107.39      
22 B1 689 683 1.10      
23 B1 345 342 2.61      
24 B1 219 217 12.89      
25 B2 3136 3108 2.97      
26 B2 3118 3090 32.81      
27 B2 3100 3072 0.08      
28 B2 1601 1587 0.17      
29 B2 1413 1400 3.70      
30 B2 1259 1248 4.11      
31 B2 1207 1196 13.86      
32 B2 1069 1060 2.13      
33 B2 1019 1010 0.84      
34 B2 846 838 0.44      
35 B2 635 630 0.91      
36 B2 408 404 4.15      

Unscaled Zero Point Vibrational Energy (zpe) 23452.7 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 23239.3 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
0.15986 0.07270 0.04997

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 -1.852
C3 0.000 -0.689 -1.852
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 0.531
C8 0.000 -0.720 0.531
H9 0.000 2.540 -0.652
H10 0.000 1.231 -2.801
H11 0.000 -1.231 -2.801
H12 0.000 -2.540 -0.652
H13 0.000 -1.455 2.815
H14 0.000 1.455 2.815

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44552.46522.89483.41492.77991.36332.45541.09322.18983.45313.98764.49883.4375
C21.44551.37762.46524.13513.90212.38392.76902.20631.09292.14173.44475.13664.7304
C32.46521.37761.44553.90214.13512.76902.38393.44472.14171.09292.20634.73045.1366
C42.89482.46521.44552.77993.41492.45541.36333.98763.45312.18981.09323.43754.4988
C53.41494.13513.90212.77991.35892.06521.51904.20325.21364.88213.28071.08982.2675
C62.77993.90214.13513.41491.35891.51902.06523.28074.88215.21364.20322.26751.0898
C71.36332.38392.76902.45542.06521.51901.44072.17083.37133.86183.46863.15422.3994
C82.45542.76902.38391.36331.51902.06521.44073.46863.86183.37132.17082.39943.1542
H91.09322.20633.44473.98764.20323.28072.17083.46862.51604.34075.08025.29013.6337
H102.18981.09292.14173.45315.21364.88213.37133.86182.51602.46274.34076.22595.6210
H113.45312.14171.09292.18984.88215.21363.86183.37134.34072.46272.51605.62106.2259
H123.98763.44472.20631.09323.28074.20323.46862.17085.08024.34072.51603.63375.2901
H134.49885.13664.73043.43751.08982.26753.15422.39945.29016.22595.62103.63372.9097
H143.43754.73045.13664.49882.26751.08982.39943.15423.63375.62106.22595.29012.9097

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.655 C1 C2 H10 118.578
C1 C7 C6 149.314 C1 C7 N8 122.228
C2 C1 C7 116.117 C2 C1 H9 120.067
C2 C3 C4 121.655 C2 C3 H11 119.767
C3 C2 H10 119.767 C3 C4 N8 116.117
C3 C4 H12 120.067 C4 C3 H11 118.578
C4 N8 C5 149.314 C4 N8 C7 122.228
C5 C6 C7 91.542 C5 C6 H14 135.357
C5 N8 C7 88.458 C6 C5 N8 91.542
C6 C5 H13 135.357 C6 C7 N8 88.458
C7 C1 H9 123.817 C7 C6 H14 133.100
N8 C4 H12 123.817 N8 C5 H13 133.100
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 -0.094      
2 C -0.106      
3 C -0.106      
4 C -0.094      
5 C -0.089      
6 C -0.089      
7 C 0.009      
8 C 0.009      
9 H 0.091      
10 H 0.097      
11 H 0.097      
12 H 0.091      
13 H 0.092      
14 H 0.092      


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 0.659 0.659
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.736 0.000 0.000
y 0.000 -41.017 0.000
z 0.000 0.000 -40.253
Traceless
 xyz
x -10.101 0.000 0.000
y 0.000 4.478 0.000
z 0.000 0.000 5.624
Polar
3z2-r211.247
x2-y2-9.719
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.312 0.000 0.000
y 0.000 13.833 0.000
z 0.000 0.000 17.165


<r2> (average value of r2) Å2
<r2> 222.287
(<r2>)1/2 14.909