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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3LYP/CEP-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 B3LYP/CEP-31G
 hartrees
Energy at 0K-48.607099
Energy at 298.15K-48.612758
HF Energy-48.607099
Nuclear repulsion energy150.164874
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 B3LYP/CEP-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 3264 3161 14.67      
2 A1 3212 3111 19.28      
3 A1 3187 3086 28.71      
4 A1 1696 1642 0.46      
5 A1 1537 1489 4.75      
6 A1 1503 1455 3.62      
7 A1 1433 1388 16.72      
8 A1 1192 1154 0.00      
9 A1 1104 1069 0.01      
10 A1 1062 1029 1.74      
11 A1 977 946 4.73      
12 A1 803 778 0.10      
13 A1 538 521 0.01      
14 A2 1016 984 0.00      
15 A2 954 924 0.00      
16 A2 914 886 0.00      
17 A2 777 753 0.00      
18 A2 578 560 0.00      
19 A2 300 291 0.00      
20 B1 979 948 21.19      
21 B1 796 770 217.20      
22 B1 759 735 3.67      
23 B1 374 363 6.04      
24 B1 241 234 16.59      
25 B2 3223 3121 0.54      
26 B2 3203 3102 38.07      
27 B2 3160 3060 1.99      
28 B2 1646 1594 0.44      
29 B2 1448 1402 6.04      
30 B2 1302 1261 3.81      
31 B2 1241 1202 12.66      
32 B2 1094 1060 2.31      
33 B2 1033 1000 0.14      
34 B2 861 834 1.37      
35 B2 646 626 0.80      
36 B2 405 393 4.48      

Unscaled Zero Point Vibrational Energy (zpe) 24229.3 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 23463.7 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 B3LYP/CEP-31G
ABC
0.15439 0.07030 0.04831

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.477 -0.635
C2 0.000 0.703 -1.887
C3 0.000 -0.703 -1.887
C4 0.000 -1.477 -0.635
C5 0.000 -0.695 2.090
C6 0.000 0.695 2.090
C7 0.000 0.735 0.540
C8 0.000 -0.735 0.540
H9 0.000 2.568 -0.667
H10 0.000 1.247 -2.836
H11 0.000 -1.247 -2.836
H12 0.000 -2.568 -0.667
H13 0.000 -1.469 2.854
H14 0.000 1.469 2.854

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.47102.51332.95313.48492.83581.38992.50451.09202.21243.50134.04474.56673.4899
C21.47101.40622.51334.21573.97722.42702.82092.22821.09392.16883.49105.21504.8026
C32.51331.40621.47103.97724.21572.82092.42703.49102.16881.09392.22824.80265.2150
C42.95312.51331.47102.83583.48492.50451.38994.04473.50132.21241.09203.48994.5667
C53.48494.21573.97722.83581.38952.10891.55094.27225.29514.95723.33391.08772.2946
C62.83583.97724.21573.48491.38951.55092.10893.33394.95725.29514.27222.29461.0877
C71.38992.42702.82092.50452.10891.55091.46982.19513.41463.91473.51683.19582.4280
C82.50452.82092.42701.38991.55092.10891.46983.51683.91473.41462.19512.42803.1958
H91.09202.22823.49104.04474.27223.33392.19513.51682.53924.38825.13615.35733.6894
H102.21241.09392.16883.50135.29514.95723.41463.91472.53922.49394.38826.30525.6946
H113.50132.16881.09392.21244.95725.29513.91473.41464.38822.49392.53925.69466.3052
H124.04473.49102.22821.09203.33394.27223.51682.19515.13614.38822.53923.68945.3573
H134.56675.21504.80263.48991.08772.29463.19582.42805.35736.30525.69463.68942.9378
H143.48994.80265.21504.56672.29461.08772.42803.19583.68945.69466.30525.35732.9378

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.720 C1 C2 H10 118.467
C1 C7 C6 149.238 C1 C7 N8 122.247
C2 C1 C7 116.033 C2 C1 H9 120.041
C2 C3 C4 121.720 C2 C3 H11 119.813
C3 C2 H10 119.813 C3 C4 N8 116.033
C3 C4 H12 120.041 C4 C3 H11 118.467
C4 N8 C5 149.238 C4 N8 C7 122.247
C5 C6 C7 91.485 C5 C6 H14 135.378
C5 N8 C7 88.515 C6 C5 N8 91.485
C6 C5 H13 135.378 C6 C7 N8 88.515
C7 C1 H9 123.926 C7 C6 H14 133.137
N8 C4 H12 123.926 N8 C5 H13 133.137
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.098      
2 C -0.310      
3 C -0.310      
4 C -0.098      
5 C -0.220      
6 C -0.220      
7 C -0.278      
8 C -0.278      
9 H 0.311      
10 H 0.265      
11 H 0.265      
12 H 0.311      
13 H 0.329      
14 H 0.329      


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 0.451 0.451
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.380 0.000 0.000
y 0.000 -40.376 0.000
z 0.000 0.000 -39.902
Traceless
 xyz
x -11.241 0.000 0.000
y 0.000 5.265 0.000
z 0.000 0.000 5.976
Polar
3z2-r211.952
x2-y2-11.004
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.686 0.000 0.000
y 0.000 13.644 0.000
z 0.000 0.000 16.483


<r2> (average value of r2) Å2
<r2> 179.527
(<r2>)1/2 13.399