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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: CCD/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 CCD/6-31G(2df,p)
 hartrees
Energy at 0K-307.584905
Energy at 298.15K-307.590571
HF Energy-306.364929
Nuclear repulsion energy312.708337
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/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 3301 3127 6.27      
2 A1 3255 3083 8.61      
3 A1 3240 3069 9.94      
4 A1 1749 1657 2.63      
5 A1 1595 1511 1.13      
6 A1 1529 1449 1.98      
7 A1 1459 1382 10.90      
8 A1 1207 1143 0.07      
9 A1 1113 1054 0.14      
10 A1 1089 1032 0.21      
11 A1 973 921 2.99      
12 A1 830 786 0.53      
13 A1 548 519 0.17      
14 A2 962 911 0.00      
15 A2 912 864 0.00      
16 A2 877 831 0.00      
17 A2 750 711 0.00      
18 A2 576 546 0.00      
19 A2 297 281 0.00      
20 B1 913 865 7.56      
21 B1 771 730 82.68      
22 B1 739 700 4.10      
23 B1 357 338 1.65      
24 B1 243 230 9.47      
25 B2 3270 3097 0.77      
26 B2 3249 3077 19.35      
27 B2 3226 3056 0.03      
28 B2 1714 1624 0.07      
29 B2 1479 1401 4.45      
30 B2 1325 1255 3.25      
31 B2 1276 1208 12.49      
32 B2 1109 1050 1.41      
33 B2 1059 1004 0.94      
34 B2 890 843 0.56      
35 B2 660 625 1.25      
36 B2 425 403 3.05      

Unscaled Zero Point Vibrational Energy (zpe) 24483.6 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 23190.9 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/6-31G(2df,p)
ABC
0.16112 0.07352 0.05048

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.442 -0.616
C2 0.000 0.683 -1.843
C3 0.000 -0.683 -1.843
C4 0.000 -1.442 -0.616
C5 0.000 -0.674 2.041
C6 0.000 0.674 2.041
C7 0.000 0.718 0.523
C8 0.000 -0.718 0.523
H9 0.000 2.525 -0.645
H10 0.000 1.219 -2.784
H11 0.000 -1.219 -2.784
H12 0.000 -2.525 -0.645
H13 0.000 -1.442 2.801
H14 0.000 1.442 2.801

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44262.45382.88433.39722.76591.35012.44201.08302.17933.43233.96704.47153.4175
C21.44261.36612.45384.11443.88402.36632.74972.19721.08292.12203.42435.10714.7057
C32.45381.36611.44263.88404.11442.74972.36633.42432.12201.08292.19724.70575.1071
C42.88432.45381.44262.76593.39722.44201.35013.96703.43232.17931.08303.41754.4715
C53.39724.11443.88402.76591.34892.05981.51854.17715.18324.85573.26141.08002.2484
C62.76593.88404.11443.39721.34891.51852.05983.26144.85575.18324.17712.24841.0800
C71.35012.36632.74972.44202.05981.51851.43562.15143.34493.83253.44643.13892.3903
C82.44202.74972.36631.35011.51852.05981.43563.44643.83253.34492.15142.39033.1389
H91.08302.19723.42433.96704.17713.26142.15143.44642.50644.31185.04945.25413.6122
H102.17931.08292.12203.43235.18324.85573.34493.83252.50642.43784.31186.18655.5897
H113.43232.12201.08292.17934.85575.18323.83253.34494.31182.43782.50645.58976.1865
H123.96703.42432.19721.08303.26144.17713.44642.15145.04944.31182.50643.61225.2541
H134.47155.10714.70573.41751.08002.24843.13892.39035.25416.18655.58973.61222.8831
H143.41754.70575.10714.47152.24841.08002.39033.13893.61225.58976.18655.25412.8831

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.749 C1 C2 H10 118.594
C1 C7 C6 149.189 C1 C7 N8 122.447
C2 C1 C7 115.804 C2 C1 H9 120.241
C2 C3 C4 121.749 C2 C3 H11 119.657
C3 C2 H10 119.657 C3 C4 N8 115.804
C3 C4 H12 120.241 C4 C3 H11 118.594
C4 N8 C5 149.189 C4 N8 C7 122.447
C5 C6 C7 91.636 C5 C6 H14 135.257
C5 N8 C7 88.364 C6 C5 N8 91.636
C6 C5 H13 135.257 C6 C7 N8 88.364
C7 C1 H9 123.954 C7 C6 H14 133.108
N8 C4 H12 123.954 N8 C5 H13 133.108
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability