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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B97D3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B97D3/6-31G*
 hartrees
Energy at 0K-308.148103
Energy at 298.15K-308.153496
HF Energy-308.148103
Nuclear repulsion energy 
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 B97D3/6-31G*
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 3193 3130 24.24      
2 A1 3149 3088 28.39      
3 A1 3132 3071 13.58      
4 A1 1672 1639 2.35      
5 A1 1533 1503 1.69      
6 A1 1483 1454 1.11      
7 A1 1421 1393 7.84      
8 A1 1176 1153 0.00      
9 A1 1080 1059 0.01      
10 A1 1051 1031 0.55      
11 A1 972 953 2.81      
12 A1 802 786 0.15      
13 A1 541 530 0.16      
14 A2 918 900 0.00      
15 A2 863 846 0.00      
16 A2 828 812 0.00      
17 A2 757 742 0.00      
18 A2 564 553 0.00      
19 A2 290 284 0.00      
20 B1 869 852 6.77      
21 B1 719 705 88.04      
22 B1 692 678 4.10      
23 B1 350 343 1.36      
24 B1 220 216 8.92      
25 B2 3163 3101 6.36      
26 B2 3140 3079 54.30      
27 B2 3121 3060 0.02      
28 B2 1618 1586 0.13      
29 B2 1441 1413 3.00      
30 B2 1287 1262 1.53      
31 B2 1230 1206 12.61      
32 B2 1080 1059 1.49      
33 B2 1026 1006 1.66      
34 B2 859 842 0.15      
35 B2 648 635 0.72      
36 B2 408 400 3.71      

Unscaled Zero Point Vibrational Energy (zpe) 23647.6 cm-1
Scaled (by 0.9804) Zero Point Vibrational Energy (zpe) 23184.1 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 B97D3/6-31G*
ABC
0.15939 0.07234 0.04976

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.451 -0.628
C2 0.000 0.693 -1.853
C3 0.000 -0.693 -1.853
C4 0.000 -1.451 -0.628
C5 0.000 -0.681 2.057
C6 0.000 0.681 2.057
C7 0.000 0.716 0.527
C8 0.000 -0.716 0.527
H9 0.000 2.542 -0.650
H10 0.000 1.230 -2.803
H11 0.000 -1.230 -2.803
H12 0.000 -2.542 -0.650
H13 0.000 -1.441 2.837
H14 0.000 1.441 2.837

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44122.46942.90213.42882.79311.36852.45571.09092.18623.45253.99284.51313.4646
C21.44121.38562.46944.14503.91062.38032.76602.20581.09102.14463.45095.15284.7495
C32.46941.38561.44123.91064.14502.76602.38033.45092.14461.09102.20584.74955.1528
C42.90212.46941.44122.79313.42882.45571.36853.99283.45252.18621.09093.46464.5131
C53.42884.14503.91062.79311.36282.07261.53084.20955.22244.89093.28511.08862.2611
C62.79313.91064.14503.42881.36281.53082.07263.28514.89095.22244.20952.26111.0886
C71.36852.38032.76602.45572.07261.53081.43262.17213.36903.85683.46423.16082.4211
C82.45572.76602.38031.36851.53082.07261.43263.46423.85683.36902.17212.42113.1608
H91.09092.20583.45093.99284.20953.28512.17213.46422.52044.34285.08345.29373.6568
H102.18621.09102.14463.45255.22244.89093.36903.85682.52042.46054.34286.24035.6436
H113.45252.14461.09102.18624.89095.22243.85683.36904.34282.46052.52045.64366.2403
H123.99283.45092.20581.09093.28514.20953.46422.17215.08344.34282.52043.65685.2937
H134.51315.15284.74953.46461.08862.26113.16082.42115.29376.24035.64363.65682.8821
H143.46464.74955.15284.51312.26111.08862.42113.16083.65685.64366.24035.29372.8821

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.716 C1 C2 H10 118.796
C1 C7 C6 148.861 C1 C7 N8 122.441
C2 C1 C7 115.843 C2 C1 H9 120.489
C2 C3 C4 121.716 C2 C3 H11 119.488
C3 C2 H10 119.488 C3 C4 N8 115.843
C3 C4 H12 120.489 C4 C3 H11 118.796
C4 N8 C5 148.861 C4 N8 C7 122.441
C5 C6 C7 91.302 C5 C6 H14 134.339
C5 N8 C7 88.698 C6 C5 N8 91.302
C6 C5 H13 134.339 C6 C7 N8 88.698
C7 C1 H9 123.668 C7 C6 H14 134.359
N8 C4 H12 123.668 N8 C5 H13 134.359
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.250      
2 C -0.139      
3 C -0.139      
4 C -0.250      
5 C -0.166      
6 C -0.166      
7 C 0.142      
8 C 0.142      
9 H 0.135      
10 H 0.131      
11 H 0.131      
12 H 0.135      
13 H 0.147      
14 H 0.147      


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 0.669 0.669
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.382 0.000 0.000
y 0.000 -40.448 0.000
z 0.000 0.000 -39.623
Traceless
 xyz
x -9.346 0.000 0.000
y 0.000 4.054 0.000
z 0.000 0.000 5.292
Polar
3z2-r210.585
x2-y2-8.933
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.079 0.000 0.000
y 0.000 13.194 0.000
z 0.000 0.000 16.396


<r2> (average value of r2) Å2
<r2> 222.522
(<r2>)1/2 14.917