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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3PW91/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-308.342851
Energy at 298.15K-308.348531
HF Energy-308.342851
Nuclear repulsion energy313.599266
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/cc-pVTZ
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 3242 3118 9.21      
2 A1 3201 3078 12.79      
3 A1 3186 3063 8.53      
4 A1 1711 1646 3.19      
5 A1 1581 1520 1.67      
6 A1 1509 1451 3.03      
7 A1 1445 1389 10.06      
8 A1 1186 1141 0.04      
9 A1 1109 1067 0.13      
10 A1 1067 1026 0.56      
11 A1 985 948 5.25      
12 A1 822 790 0.51      
13 A1 548 527 0.24      
14 A2 979 942 0.00      
15 A2 929 893 0.00      
16 A2 886 852 0.00      
17 A2 786 756 0.00      
18 A2 588 566 0.00      
19 A2 296 285 0.00      
20 B1 925 890 8.36      
21 B1 752 723 107.71      
22 B1 723 695 0.26      
23 B1 361 347 2.83      
24 B1 232 223 12.28      
25 B2 3212 3089 1.69      
26 B2 3193 3071 27.04      
27 B2 3174 3052 0.00      
28 B2 1660 1597 0.32      
29 B2 1461 1405 4.19      
30 B2 1305 1255 4.63      
31 B2 1256 1207 13.23      
32 B2 1099 1057 2.63      
33 B2 1056 1016 0.54      
34 B2 875 842 0.56      
35 B2 655 629 0.78      
36 B2 421 405 4.18      

Unscaled Zero Point Vibrational Energy (zpe) 24208.5 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 23278.9 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/cc-pVTZ
ABC
0.16255 0.07378 0.05075

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.436 -0.617
C2 0.000 0.682 -1.838
C3 0.000 -0.682 -1.838
C4 0.000 -1.436 -0.617
C5 0.000 -0.672 2.035
C6 0.000 0.672 2.035
C7 0.000 0.714 0.524
C8 0.000 -0.714 0.524
H9 0.000 2.519 -0.645
H10 0.000 1.218 -2.779
H11 0.000 -1.218 -2.779
H12 0.000 -2.519 -0.645
H13 0.000 -1.439 2.796
H14 0.000 1.439 2.796

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43492.44442.87123.38682.75891.34992.43321.08342.17293.42313.95434.46153.4121
C21.43491.36392.44444.10213.87222.36192.74322.18961.08312.12063.41545.09554.6946
C32.44441.36391.43493.87224.10212.74322.36193.41542.12061.08312.18964.69465.0955
C42.87122.44441.43492.75893.38682.43321.34993.95433.42312.17291.08343.41214.4615
C53.38684.10213.87222.75891.34392.04981.51114.16685.17114.84413.25471.08042.2438
C62.75893.87224.10213.38681.34391.51112.04983.25474.84415.17114.16682.24381.0804
C71.34992.36192.74322.43322.04981.51111.42742.15073.34103.82633.43743.12942.3844
C82.43322.74322.36191.34991.51112.04981.42743.43743.82633.34102.15072.38443.1294
H91.08342.18963.41543.95434.16683.25472.15073.43742.49824.30305.03735.24433.6064
H102.17291.08312.12063.42315.17114.84413.34103.82632.49822.43684.30306.17515.5785
H113.42312.12061.08312.17294.84415.17113.82633.34104.30302.43682.49825.57856.1751
H123.95433.41542.18961.08343.25474.16683.43742.15075.03734.30302.49823.60645.2443
H134.46155.09554.69463.41211.08042.24383.12942.38445.24436.17515.57853.60642.8778
H143.41214.69465.09554.46152.24381.08042.38443.12943.60645.57856.17515.24432.8778

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.683 C1 C2 H10 118.632
C1 C7 C6 149.255 C1 C7 N8 122.329
C2 C1 C7 115.988 C2 C1 H9 120.153
C2 C3 C4 121.683 C2 C3 H11 119.686
C3 C2 H10 119.686 C3 C4 N8 115.988
C3 C4 H12 120.153 C4 C3 H11 118.632
C4 N8 C5 149.255 C4 N8 C7 122.329
C5 C6 C7 91.584 C5 C6 H14 135.228
C5 N8 C7 88.416 C6 C5 N8 91.584
C6 C5 H13 135.228 C6 C7 N8 88.416
C7 C1 H9 123.859 C7 C6 H14 133.188
N8 C4 H12 123.859 N8 C5 H13 133.188
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.159      
2 C -0.112      
3 C -0.112      
4 C -0.159      
5 C -0.139      
6 C -0.139      
7 C 0.087      
8 C 0.087      
9 H 0.102      
10 H 0.109      
11 H 0.109      
12 H 0.102      
13 H 0.112      
14 H 0.112      


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 0.723 0.723
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.339 0.000 0.000
y 0.000 -40.712 0.000
z 0.000 0.000 -40.271
Traceless
 xyz
x -9.848 0.000 0.000
y 0.000 4.593 0.000
z 0.000 0.000 5.255
Polar
3z2-r210.509
x2-y2-9.627
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.279 0.000 0.000
y 0.000 13.876 0.000
z 0.000 0.000 17.020


<r2> (average value of r2) Å2
<r2> 219.158
(<r2>)1/2 14.804