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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: TPSSh/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at TPSSh/6-31G(2df,p)
 hartrees
Energy at 0K-308.414718
Energy at 298.15K-308.420315
HF Energy-308.414718
Nuclear repulsion energy312.436435
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 TPSSh/6-31G(2df,p)
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 3240 3127 16.32      
2 A1 3196 3084 19.22      
3 A1 3179 3068 12.16      
4 A1 1700 1641 3.16      
5 A1 1571 1516 1.17      
6 A1 1500 1447 1.57      
7 A1 1439 1389 9.16      
8 A1 1186 1144 0.07      
9 A1 1102 1063 0.17      
10 A1 1076 1039 0.25      
11 A1 979 945 3.51      
12 A1 813 785 0.42      
13 A1 541 522 0.18      
14 A2 953 920 0.00      
15 A2 900 869 0.00      
16 A2 866 836 0.00      
17 A2 778 751 0.00      
18 A2 579 558 0.00      
19 A2 292 282 0.00      
20 B1 901 870 6.18      
21 B1 758 731 83.25      
22 B1 732 706 0.03      
23 B1 357 344 1.82      
24 B1 238 229 8.63      
25 B2 3208 3095 3.75      
26 B2 3188 3076 40.40      
27 B2 3166 3056 0.00      
28 B2 1644 1586 0.17      
29 B2 1454 1403 3.73      
30 B2 1303 1258 3.29      
31 B2 1253 1209 11.77      
32 B2 1093 1055 1.64      
33 B2 1042 1006 1.36      
34 B2 868 838 0.37      
35 B2 645 622 0.83      
36 B2 417 403 3.69      

Unscaled Zero Point Vibrational Energy (zpe) 24078.0 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 23235.2 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 TPSSh/6-31G(2df,p)
ABC
0.16098 0.07334 0.05038

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.445 -0.621
C2 0.000 0.687 -1.842
C3 0.000 -0.687 -1.842
C4 0.000 -1.445 -0.621
C5 0.000 -0.675 2.042
C6 0.000 0.675 2.042
C7 0.000 0.714 0.524
C8 0.000 -0.714 0.524
H9 0.000 2.531 -0.648
H10 0.000 1.225 -2.785
H11 0.000 -1.225 -2.785
H12 0.000 -2.531 -0.648
H13 0.000 -1.436 2.813
H14 0.000 1.436 2.813

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43762.45762.89063.40432.77211.35782.44391.08562.17583.43723.97604.48213.4333
C21.43761.37452.45764.11673.88462.36592.74972.19631.08542.13193.43235.11624.7146
C32.45761.37451.43763.88464.11672.74972.36593.43232.13191.08542.19634.71465.1162
C42.89062.45761.43762.77213.40432.44391.35783.97603.43722.17581.08563.43334.4821
C53.40434.11673.88462.77211.35102.05871.51944.18535.18814.85873.26791.08242.2476
C62.77213.88464.11673.40431.35101.51942.05873.26794.85875.18814.18532.24761.0824
C71.35782.36592.74972.44392.05871.51941.42852.16133.34793.83503.44983.14062.4002
C82.44392.74972.36591.35781.51942.05871.42853.44983.83503.34792.16132.40023.1406
H91.08562.19633.43233.97604.18533.26792.16133.44982.50464.32095.06115.26393.6296
H102.17581.08542.13193.43725.18814.85873.34793.83502.50462.44944.32096.19805.6018
H113.43722.13191.08542.17584.85875.18813.83503.34794.32092.44942.50465.60186.1980
H123.97603.43232.19631.08563.26794.18533.44982.16135.06114.32092.50463.62965.2639
H134.48215.11624.71463.43331.08242.24763.14062.40025.26396.19805.60183.62962.8719
H143.43334.71465.11624.48212.24761.08242.40023.14063.62965.60186.19805.26392.8719

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.823 C1 C2 H10 118.498
C1 C7 C6 148.885 C1 C7 N8 122.577
C2 C1 C7 115.601 C2 C1 H9 120.382
C2 C3 C4 121.823 C2 C3 H11 119.680
C3 C2 H10 119.680 C3 C4 N8 115.601
C3 C4 H12 120.382 C4 C3 H11 118.498
C4 N8 C5 148.885 C4 N8 C7 122.577
C5 C6 C7 91.461 C5 C6 H14 134.634
C5 N8 C7 88.539 C6 C5 N8 91.461
C6 C5 H13 134.634 C6 C7 N8 88.539
C7 C1 H9 124.018 C7 C6 H14 133.904
N8 C4 H12 124.018 N8 C5 H13 133.904
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability