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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: mPW1PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-311G*
 hartrees
Energy at 0K-308.345051
Energy at 298.15K-308.350703
HF Energy-308.345051
Nuclear repulsion energy313.382982
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 mPW1PW91/6-311G*
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 3265 3116 15.08      
2 A1 3223 3076 19.00      
3 A1 3206 3060 12.56      
4 A1 1732 1653 3.54      
5 A1 1600 1527 1.16      
6 A1 1527 1458 2.83      
7 A1 1457 1391 11.49      
8 A1 1198 1143 0.00      
9 A1 1119 1068 0.03      
10 A1 1074 1025 1.01      
11 A1 994 948 5.26      
12 A1 829 791 0.50      
13 A1 553 527 0.17      
14 A2 965 921 0.00      
15 A2 917 876 0.00      
16 A2 880 839 0.00      
17 A2 782 746 0.00      
18 A2 586 559 0.00      
19 A2 296 283 0.00      
20 B1 913 871 8.44      
21 B1 750 716 124.24      
22 B1 720 687 1.23      
23 B1 362 346 2.90      
24 B1 232 221 14.61      
25 B2 3234 3087 4.05      
26 B2 3215 3068 39.94      
27 B2 3194 3048 0.02      
28 B2 1682 1605 0.42      
29 B2 1476 1409 4.41      
30 B2 1316 1256 5.09      
31 B2 1264 1206 12.92      
32 B2 1109 1058 2.38      
33 B2 1061 1012 0.63      
34 B2 883 843 0.63      
35 B2 658 628 0.85      
36 B2 424 405 4.52      

Unscaled Zero Point Vibrational Energy (zpe) 24346.2 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 23236.0 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 mPW1PW91/6-311G*
ABC
0.16235 0.07368 0.05068

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G*

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 -1.839
C3 0.000 -0.682 -1.839
C4 0.000 -1.436 -0.617
C5 0.000 -0.672 2.036
C6 0.000 0.672 2.036
C7 0.000 0.714 0.525
C8 0.000 -0.714 0.525
H9 0.000 2.520 -0.646
H10 0.000 1.219 -2.781
H11 0.000 -1.219 -2.781
H12 0.000 -2.520 -0.646
H13 0.000 -1.440 2.798
H14 0.000 1.440 2.798

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43622.44602.87233.38862.76081.35112.43461.08442.17513.42583.95644.46463.4149
C21.43621.36492.44604.10533.87552.36462.74602.19131.08412.12233.41785.09994.6988
C32.44601.36491.43623.87554.10532.74602.36463.41782.12231.08412.19134.69885.0999
C42.87232.44601.43622.76083.38862.43461.35113.95643.42582.17511.08443.41494.4646
C53.38864.10533.87552.76081.34402.05041.51164.16915.17524.84823.25701.08172.2450
C62.76083.87554.10533.38861.34401.51162.05043.25704.84825.17524.16912.24501.0817
C71.35112.36462.74602.43462.05041.51161.42802.15243.34463.83003.43953.13132.3861
C82.43462.74602.36461.35111.51162.05041.42803.43953.83003.34462.15242.38613.1313
H91.08442.19133.41783.95644.16913.25702.15243.43952.50034.30635.04035.24793.6093
H102.17511.08412.12233.42585.17524.84823.34463.83002.50032.43894.30636.18055.5835
H113.42582.12231.08412.17514.84825.17523.83003.34464.30632.43892.50035.58356.1805
H123.95643.41782.19131.08443.25704.16913.43952.15245.04034.30632.50033.60935.2479
H134.46465.09994.69883.41491.08172.24503.13132.38615.24796.18055.58353.60932.8794
H143.41494.69885.09994.46462.24501.08172.38613.13133.60935.58356.18055.24792.8794

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.656 C1 C2 H10 118.651
C1 C7 C6 149.282 C1 C7 N8 122.311
C2 C1 C7 116.034 C2 C1 H9 120.131
C2 C3 C4 121.656 C2 C3 H11 119.693
C3 C2 H10 119.693 C3 C4 N8 116.034
C3 C4 H12 120.131 C4 C3 H11 118.651
C4 N8 C5 149.282 C4 N8 C7 122.311
C5 C6 C7 91.592 C5 C6 H14 135.215
C5 N8 C7 88.408 C6 C5 N8 91.592
C6 C5 H13 135.215 C6 C7 N8 88.408
C7 C1 H9 123.835 C7 C6 H14 133.193
N8 C4 H12 123.835 N8 C5 H13 133.193
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.245      
2 C -0.212      
3 C -0.212      
4 C -0.245      
5 C -0.212      
6 C -0.212      
7 C 0.061      
8 C 0.061      
9 H 0.202      
10 H 0.201      
11 H 0.201      
12 H 0.202      
13 H 0.204      
14 H 0.204      


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 0.692 0.692
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.934 0.000 0.000
y 0.000 -40.303 0.000
z 0.000 0.000 -39.579
Traceless
 xyz
x -10.993 0.000 0.000
y 0.000 4.953 0.000
z 0.000 0.000 6.040
Polar
3z2-r212.079
x2-y2-10.631
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.149 0.000 0.000
y 0.000 13.337 0.000
z 0.000 0.000 16.156


<r2> (average value of r2) Å2
<r2> 219.316
(<r2>)1/2 14.809