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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: CCD/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 CCD/cc-pVTZ
 hartrees
Energy at 0K-307.696210
Energy at 298.15K-307.701916
HF Energy-306.434145
Nuclear repulsion energy312.986449
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 CCD/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 3281 3063 7.15      
2 A1 3238 3024 9.86      
3 A1 3223 3009 10.67      
4 A1 1743 1628 2.14      
5 A1 1592 1487 2.06      
6 A1 1527 1425 3.93      
7 A1 1459 1362 8.95      
8 A1 1199 1120 0.07      
9 A1 1113 1039 0.18      
10 A1 1086 1014 0.14      
11 A1 972 908 3.84      
12 A1 829 774 0.50      
13 A1 549 513 0.23      
14 A2 972 907 0.00      
15 A2 924 863 0.00      
16 A2 893 834 0.00      
17 A2 747 697 0.00      
18 A2 582 543 0.00      
19 A2 299 279 0.00      
20 B1 926 865 8.71      
21 B1 767 716 103.83      
22 B1 734 685 3.00      
23 B1 358 335 2.48      
24 B1 239 223 12.70      
25 B2 3250 3035 1.24      
26 B2 3232 3017 22.65      
27 B2 3207 2995 0.07      
28 B2 1711 1598 0.01      
29 B2 1480 1382 4.05      
30 B2 1326 1238 4.29      
31 B2 1281 1196 12.12      
32 B2 1108 1034 2.29      
33 B2 1068 997 0.46      
34 B2 890 831 0.62      
35 B2 662 618 1.19      
36 B2 425 397 3.40      

Unscaled Zero Point Vibrational Energy (zpe) 24445.6 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 22824.9 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 CCD/cc-pVTZ
ABC
0.16161 0.07356 0.05055

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.440 -0.616
C2 0.000 0.682 -1.842
C3 0.000 -0.682 -1.842
C4 0.000 -1.440 -0.616
C5 0.000 -0.674 2.040
C6 0.000 0.674 2.040
C7 0.000 0.717 0.523
C8 0.000 -0.717 0.523
H9 0.000 2.521 -0.644
H10 0.000 1.215 -2.782
H11 0.000 -1.215 -2.782
H12 0.000 -2.521 -0.644
H13 0.000 -1.438 2.800
H14 0.000 1.438 2.800

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44102.45112.88063.39502.76471.34972.43951.08062.17713.42663.96104.46743.4165
C21.44101.36482.45114.11203.88192.36512.74782.19401.08052.11783.41965.10344.7031
C32.45111.36481.44103.88194.11202.74782.36513.41962.11781.08052.19404.70315.1034
C42.88062.45111.44102.76473.39502.43951.34973.96103.42662.17711.08063.41654.4674
C53.39504.11203.88192.76471.34772.05801.51764.17245.17874.85213.25801.07792.2446
C62.76473.88194.11203.39501.34771.51762.05803.25804.85215.17874.17242.24461.0779
C71.34972.36512.74782.43952.05801.51761.43362.14843.34223.82823.44133.13512.3886
C82.43952.74782.36511.34971.51762.05801.43363.44133.82823.34222.14842.38863.1351
H91.08062.19403.41963.96104.17243.25802.14843.44132.50464.30435.04115.24733.6103
H102.17711.08052.11783.42665.17874.85213.34223.82822.50462.43084.30436.18055.5863
H113.42662.11781.08052.17714.85215.17873.82823.34224.30432.43082.50465.58636.1805
H123.96103.41962.19401.08063.25804.17243.44132.14845.04114.30432.50463.61035.2473
H134.46745.10344.70313.41651.07792.24463.13512.38865.24736.18055.58633.61032.8763
H143.41654.70315.10344.46742.24461.07792.38863.13513.61035.58636.18055.24732.8763

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.734 C1 C2 H10 118.708
C1 C7 C6 149.205 C1 C7 N8 122.416
C2 C1 C7 115.850 C2 C1 H9 120.262
C2 C3 C4 121.734 C2 C3 H11 119.557
C3 C2 H10 119.557 C3 C4 N8 115.850
C3 C4 H12 120.262 C4 C3 H11 118.708
C4 N8 C5 149.205 C4 N8 C7 122.416
C5 C6 C7 91.622 C5 C6 H14 135.157
C5 N8 C7 88.378 C6 C5 N8 91.622
C6 C5 H13 135.157 C6 C7 N8 88.378
C7 C1 H9 123.888 C7 C6 H14 133.221
N8 C4 H12 123.888 N8 C5 H13 133.221
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability