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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3PW91/cc-pVDZ

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-pVDZ
 hartrees
Energy at 0K-308.265405
Energy at 298.15K-308.271052
HF Energy-308.265405
Nuclear repulsion energy311.895993
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-pVDZ
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 3252 3139 8.80      
2 A1 3215 3102 12.48      
3 A1 3199 3087 8.95      
4 A1 1724 1663 3.20      
5 A1 1587 1532 0.96      
6 A1 1525 1472 2.55      
7 A1 1438 1388 10.32      
8 A1 1177 1136 0.02      
9 A1 1112 1074 0.05      
10 A1 1048 1011 1.05      
11 A1 991 956 5.03      
12 A1 823 794 0.48      
13 A1 547 528 0.18      
14 A2 976 942 0.00      
15 A2 922 890 0.00      
16 A2 880 849 0.00      
17 A2 783 756 0.00      
18 A2 584 564 0.00      
19 A2 295 285 0.00      
20 B1 920 888 6.47      
21 B1 751 724 91.21      
22 B1 723 698 0.14      
23 B1 361 349 2.47      
24 B1 234 225 10.66      
25 B2 3221 3108 1.20      
26 B2 3207 3094 26.35      
27 B2 3186 3075 0.00      
28 B2 1672 1614 0.46      
29 B2 1455 1404 3.36      
30 B2 1289 1244 5.70      
31 B2 1239 1196 12.76      
32 B2 1096 1057 2.11      
33 B2 1045 1008 0.57      
34 B2 871 841 0.69      
35 B2 651 628 0.88      
36 B2 420 405 4.21      

Unscaled Zero Point Vibrational Energy (zpe) 24208.0 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 23360.7 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 B3PW91/cc-pVDZ
ABC
0.16063 0.07308 0.05023

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.444 -0.620
C2 0.000 0.687 -1.848
C3 0.000 -0.687 -1.848
C4 0.000 -1.444 -0.620
C5 0.000 -0.677 2.045
C6 0.000 0.677 2.045
C7 0.000 0.717 0.529
C8 0.000 -0.717 0.529
H9 0.000 2.536 -0.649
H10 0.000 1.228 -2.796
H11 0.000 -1.228 -2.796
H12 0.000 -2.536 -0.649
H13 0.000 -1.452 2.812
H14 0.000 1.452 2.812

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44222.45852.88753.40562.77341.35932.44731.09262.18663.44583.97994.49083.4326
C21.44221.37302.45854.12423.89252.37632.75982.20371.09232.13673.43815.12714.7224
C32.45851.37301.44223.89254.12422.75982.37633.43812.13671.09232.20374.72245.1271
C42.88752.45851.44222.77343.40562.44731.35933.97993.44582.18661.09263.43264.4908
C53.40564.12423.89252.77341.35302.05951.51694.19285.20224.87243.27371.09092.2624
C62.77343.89254.12423.40561.35301.51692.05953.27374.87245.20224.19282.26241.0909
C71.35932.37632.75982.44732.05951.51691.43432.16703.36383.85203.45993.14962.3991
C82.44732.75982.37631.35931.51692.05951.43433.45993.85203.36382.16702.39913.1496
H91.09262.20373.43813.97994.19283.27372.16703.45992.51384.33335.07205.28083.6276
H102.18661.09232.13673.44585.20224.87243.36383.85202.51382.45624.33336.21595.6130
H113.44582.13671.09232.18664.87245.20223.85203.36384.33332.45622.51385.61306.2159
H123.97993.43812.20371.09263.27374.19283.45992.16705.07204.33332.51383.62765.2808
H134.49085.12714.72243.43261.09092.26243.14962.39915.28086.21595.61303.62762.9035
H143.43264.72245.12714.49082.26241.09092.39913.14963.62765.61306.21595.28082.9035

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.675 C1 C2 H10 118.601
C1 C7 C6 149.223 C1 C7 N8 122.313
C2 C1 C7 116.012 C2 C1 H9 120.145
C2 C3 C4 121.675 C2 C3 H11 119.724
C3 C2 H10 119.724 C3 C4 N8 116.012
C3 C4 H12 120.145 C4 C3 H11 118.601
C4 N8 C5 149.223 C4 N8 C7 122.313
C5 C6 C7 91.536 C5 C6 H14 135.287
C5 N8 C7 88.464 C6 C5 N8 91.536
C6 C5 H13 135.287 C6 C7 N8 88.464
C7 C1 H9 123.843 C7 C6 H14 133.177
N8 C4 H12 123.843 N8 C5 H13 133.177
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.113      
2 C -0.001      
3 C -0.001      
4 C -0.113      
5 C -0.027      
6 C -0.027      
7 C 0.136      
8 C 0.136      
9 H -0.002      
10 H 0.003      
11 H 0.003      
12 H -0.002      
13 H 0.003      
14 H 0.003      


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 0.702 0.702
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.207 0.000 0.000
y 0.000 -40.634 0.000
z 0.000 0.000 -39.973
Traceless
 xyz
x -9.903 0.000 0.000
y 0.000 4.456 0.000
z 0.000 0.000 5.447
Polar
3z2-r210.895
x2-y2-9.573
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.615 0.000 0.000
y 0.000 13.516 0.000
z 0.000 0.000 16.464


<r2> (average value of r2) Å2
<r2> 221.095
(<r2>)1/2 14.869