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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3LYP/CEP-121G*

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-121G*
 hartrees
Energy at 0K-48.711064
Energy at 298.15K-48.716681
HF Energy-48.711064
Nuclear repulsion energy151.951328
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-121G*
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 3218 3120 19.25      
2 A1 3177 3080 26.92      
3 A1 3161 3064 15.57      
4 A1 1671 1619 2.10      
5 A1 1542 1494 4.30      
6 A1 1470 1425 4.07      
7 A1 1424 1380 9.17      
8 A1 1172 1136 0.00      
9 A1 1085 1052 0.13      
10 A1 1057 1025 0.57      
11 A1 958 928 4.90      
12 A1 800 776 0.31      
13 A1 538 521 0.20      
14 A2 956 927 0.00      
15 A2 922 894 0.00      
16 A2 874 847 0.00      
17 A2 824 799 0.00      
18 A2 575 558 0.00      
19 A2 301 291 0.00      
20 B1 911 883 15.39      
21 B1 760 737 135.90      
22 B1 729 706 0.22      
23 B1 378 366 4.04      
24 B1 247 240 10.87      
25 B2 3189 3092 5.39      
26 B2 3169 3072 53.84      
27 B2 3149 3052 0.01      
28 B2 1622 1573 0.44      
29 B2 1442 1398 3.53      
30 B2 1292 1252 3.59      
31 B2 1242 1204 11.63      
32 B2 1076 1043 2.32      
33 B2 1032 1000 0.79      
34 B2 861 834 0.48      
35 B2 644 624 0.77      
36 B2 410 398 4.22      

Unscaled Zero Point Vibrational Energy (zpe) 23936.8 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 23204.3 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 B3LYP/CEP-121G*
ABC
0.15883 0.07195 0.04952

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.453 -0.624
C2 0.000 0.691 -1.864
C3 0.000 -0.691 -1.864
C4 0.000 -1.453 -0.624
C5 0.000 -0.681 2.062
C6 0.000 0.681 2.062
C7 0.000 0.723 0.531
C8 0.000 -0.723 0.531
H9 0.000 2.543 -0.653
H10 0.000 1.233 -2.809
H11 0.000 -1.233 -2.809
H12 0.000 -2.543 -0.653
H13 0.000 -1.452 2.829
H14 0.000 1.452 2.829

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.45512.47682.90663.43082.79511.36662.46431.09012.19623.46253.99644.51233.4527
C21.45511.38222.47684.15863.92572.39512.78142.21231.08982.14373.45315.15844.7535
C32.47681.38221.45513.92574.15862.78142.39513.45312.14371.08982.21234.75355.1584
C42.90662.47681.45512.79513.43082.46431.36663.99643.46252.19621.09013.45274.5123
C53.43084.15863.92572.79511.36192.07741.53144.21525.23384.90253.29261.08712.2663
C62.79513.92574.15863.43081.36191.53142.07743.29264.90255.23384.21522.26631.0871
C71.36662.39512.78142.46432.07741.53141.44672.17133.37913.87113.47463.16372.4101
C82.46432.78142.39511.36661.53142.07741.44673.47463.87113.37912.17132.41013.1637
H91.09012.21233.45313.99644.21523.29262.17133.47462.52284.34785.08605.29933.6490
H102.19621.08982.14373.46255.23384.90253.37913.87112.52282.46544.34786.24445.6421
H113.46252.14371.08982.19624.90255.23383.87113.37914.34782.46542.52285.64216.2444
H123.99643.45312.21231.09013.29264.21523.47462.17135.08604.34782.52283.64905.2993
H134.51235.15844.75353.45271.08712.26633.16372.41015.29936.24445.64213.64902.9036
H143.45274.75355.15844.51232.26631.08712.41013.16373.64905.64216.24445.29932.9036

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.588 C1 C2 H10 118.612
C1 C7 C6 149.306 C1 C7 N8 122.282
C2 C1 C7 116.130 C2 C1 H9 120.050
C2 C3 C4 121.588 C2 C3 H11 119.800
C3 C2 H10 119.800 C3 C4 N8 116.130
C3 C4 H12 120.050 C4 C3 H11 118.612
C4 N8 C5 149.306 C4 N8 C7 122.282
C5 C6 C7 91.588 C5 C6 H14 135.161
C5 N8 C7 88.412 C6 C5 N8 91.588
C6 C5 H13 135.161 C6 C7 N8 88.412
C7 C1 H9 123.820 C7 C6 H14 133.251
N8 C4 H12 123.820 N8 C5 H13 133.251
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.488      
2 C -0.186      
3 C -0.186      
4 C -0.488      
5 C -0.237      
6 C -0.237      
7 C 0.239      
8 C 0.239      
9 H 0.223      
10 H 0.192      
11 H 0.192      
12 H 0.223      
13 H 0.257      
14 H 0.257      


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 0.679 0.679
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.973 0.000 0.000
y 0.000 -40.637 0.000
z 0.000 0.000 -40.287
Traceless
 xyz
x -10.511 0.000 0.000
y 0.000 4.993 0.000
z 0.000 0.000 5.518
Polar
3z2-r211.036
x2-y2-10.336
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.840 0.000 0.000
y 0.000 14.201 0.000
z 0.000 0.000 17.235


<r2> (average value of r2) Å2
<r2> 176.072
(<r2>)1/2 13.269