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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: CID/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 CID/6-311G*
 hartrees
Energy at 0K-307.229538
Energy at 298.15K-307.235346
HF Energy-306.388166
Nuclear repulsion energy313.963954
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 CID/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 3371 3132 10.64      
2 A1 3324 3088 16.33      
3 A1 3307 3072 14.14      
4 A1 1812 1683 3.86      
5 A1 1673 1555 0.99      
6 A1 1581 1469 5.24      
7 A1 1513 1405 14.23      
8 A1 1247 1158 0.00      
9 A1 1154 1072 0.16      
10 A1 1125 1045 0.37      
11 A1 1001 930 5.01      
12 A1 861 800 0.56      
13 A1 571 531 0.20      
14 A2 974 905 0.00      
15 A2 940 874 0.00      
16 A2 908 844 0.00      
17 A2 698 649 0.00      
18 A2 581 540 0.00      
19 A2 306 284 0.00      
20 B1 937 871 12.16      
21 B1 792 736 130.31      
22 B1 757 703 3.73      
23 B1 367 341 2.62      
24 B1 249 231 15.95      
25 B2 3339 3103 1.77      
26 B2 3316 3081 34.13      
27 B2 3292 3059 0.20      
28 B2 1777 1651 0.64      
29 B2 1536 1427 5.98      
30 B2 1376 1279 5.75      
31 B2 1323 1230 11.82      
32 B2 1145 1064 2.30      
33 B2 1103 1024 0.44      
34 B2 923 858 1.03      
35 B2 684 636 0.77      
36 B2 443 411 4.44      

Unscaled Zero Point Vibrational Energy (zpe) 25152.0 cm-1
Scaled (by 0.9291) Zero Point Vibrational Energy (zpe) 23368.7 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 CID/6-311G*
ABC
0.16287 0.07394 0.05085

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.434 -0.613
C2 0.000 0.679 -1.838
C3 0.000 -0.679 -1.838
C4 0.000 -1.434 -0.613
C5 0.000 -0.668 2.034
C6 0.000 0.668 2.034
C7 0.000 0.713 0.520
C8 0.000 -0.713 0.520
H9 0.000 2.511 -0.640
H10 0.000 1.211 -2.775
H11 0.000 -1.211 -2.775
H12 0.000 -2.511 -0.640
H13 0.000 -1.429 2.794
H14 0.000 1.429 2.794

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43872.44182.86773.38012.75591.34362.42751.07782.17303.41553.94524.45003.4072
C21.43871.35742.44184.09933.87192.35862.73822.18941.07752.10903.40755.08864.6921
C32.44181.35741.43873.87194.09932.73822.35863.40752.10901.07752.18944.69215.0886
C42.86772.44181.43872.75593.38012.42751.34363.94523.41552.17301.07783.40724.4500
C53.38014.09933.87192.75591.33562.04861.51434.15415.16274.83943.24781.07532.2299
C62.75593.87194.09933.38011.33561.51432.04863.24784.83945.16274.15412.22991.0753
C71.34362.35862.73822.42752.04861.51431.42542.14043.33273.81553.42643.12322.3835
C82.42752.73822.35861.34361.51432.04861.42543.42643.81553.33272.14042.38353.1232
H91.07782.18943.40753.94524.15413.24782.14043.42642.49994.29095.02265.22633.6004
H102.17301.07752.10903.41555.16274.83943.33273.81552.49992.42154.29096.16265.5730
H113.41552.10901.07752.17304.83945.16273.81553.33274.29092.42152.49995.57306.1626
H123.94523.40752.18941.07783.24784.15413.42642.14045.02264.29092.49993.60045.2263
H134.45005.08864.69213.40721.07532.22993.12322.38355.22636.16265.57303.60042.8573
H143.40724.69215.08864.45002.22991.07532.38353.12323.60045.57306.16265.22632.8573

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.660 C1 C2 H10 118.751
C1 C7 C6 149.242 C1 C7 N8 122.459
C2 C1 C7 115.882 C2 C1 H9 120.248
C2 C3 C4 121.660 C2 C3 H11 119.589
C3 C2 H10 119.589 C3 C4 N8 115.882
C3 C4 H12 120.248 C4 C3 H11 118.751
C4 N8 C5 149.242 C4 N8 C7 122.459
C5 C6 C7 91.701 C5 C6 H14 135.037
C5 N8 C7 88.299 C6 C5 N8 91.701
C6 C5 H13 135.037 C6 C7 N8 88.299
C7 C1 H9 123.870 C7 C6 H14 133.262
N8 C4 H12 123.870 N8 C5 H13 133.262
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability