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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: MP2=FULL/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2=FULL/TZVP
 hartrees
Energy at 0K-307.638665
Energy at 298.15K 
HF Energy-306.421209
Nuclear repulsion energy312.818186
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 MP2=FULL/TZVP
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 3287 3131 8.45      
2 A1 3245 3091 11.27      
3 A1 3230 3077 8.19      
4 A1 1697 1617 1.14      
5 A1 1541 1468 3.45      
6 A1 1511 1440 2.69      
7 A1 1450 1382 9.06      
8 A1 1197 1140 0.06      
9 A1 1124 1071 0.19      
10 A1 1076 1025 0.64      
11 A1 999 952 3.90      
12 A1 817 778 0.36      
13 A1 546 520 0.08      
14 A2 788 751 0.00      
15 A2 683 651 0.00      
16 A2 628 599 0.00      
17 A2 150 143 0.00      
18 A2 751i 716i 0.00      
19 A2 1860i 1772i 0.00      
20 B1 654 623 115.86      
21 B1 618 588 25.17      
22 B1 537 511 0.04      
23 B1 162 155 6.70      
24 B1 373i 355i 0.14      
25 B2 3258 3104 1.43      
26 B2 3238 3084 22.53      
27 B2 3217 3065 0.03      
28 B2 1647 1569 0.68      
29 B2 1470 1401 3.26      
30 B2 1311 1249 4.18      
31 B2 1261 1201 14.33      
32 B2 1114 1061 1.78      
33 B2 1047 997 1.48      
34 B2 864 823 0.49      
35 B2 652 621 1.36      
36 B2 414 394 3.56      

Unscaled Zero Point Vibrational Energy (zpe) 21222.0 cm-1
Scaled (by 0.9527) Zero Point Vibrational Energy (zpe) 20218.2 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 MP2=FULL/TZVP
ABC
0.16127 0.07353 0.05050

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.442 -0.621
C2 0.000 0.687 -1.839
C3 0.000 -0.687 -1.839
C4 0.000 -1.442 -0.621
C5 0.000 -0.677 2.039
C6 0.000 0.677 2.039
C7 0.000 0.715 0.526
C8 0.000 -0.715 0.526
H9 0.000 2.524 -0.650
H10 0.000 1.221 -2.780
H11 0.000 -1.221 -2.780
H12 0.000 -2.524 -0.650
H13 0.000 -1.443 2.800
H14 0.000 1.443 2.800

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43352.45302.88413.40052.76761.35742.44311.08262.17073.42873.96654.47483.4202
C21.43351.37382.45304.11093.87812.36502.74932.18841.08212.12753.42415.10444.6999
C32.45301.37381.43353.87814.11092.74932.36503.42412.12751.08212.18844.69995.1044
C42.88412.45301.43352.76763.40052.44311.35743.96653.42872.17071.08263.42024.4748
C53.40054.11093.87812.76761.35362.05621.51384.18095.17944.84983.26291.07982.2524
C62.76763.87814.11093.40051.35361.51382.05623.26294.84985.17944.18092.25241.0798
C71.35742.36502.74932.44312.05621.51381.43072.15773.34433.83133.44653.13532.3875
C82.44312.74932.36501.35741.51382.05621.43073.44653.83133.34432.15772.38753.1353
H91.08262.18843.42413.96654.18093.26292.15773.44652.49684.30865.04865.25783.6153
H102.17071.08212.12753.42875.17944.84983.34433.83132.49682.44234.30866.18325.5841
H113.42872.12751.08212.17074.84985.17943.83133.34434.30862.44232.49685.58416.1832
H123.96653.42412.18841.08263.26294.18093.44652.15775.04864.30862.49683.61535.2578
H134.47485.10444.69993.42021.07982.25243.13532.38755.25786.18325.58413.61532.8867
H143.42024.69995.10444.47482.25241.07982.38753.13533.61535.58416.18325.25782.8867

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.790 C1 C2 H10 118.626
C1 C7 C6 149.087 C1 C7 N8 122.372
C2 C1 C7 115.839 C2 C1 H9 120.216
C2 C3 C4 121.790 C2 C3 H11 119.584
C3 C2 H10 119.584 C3 C4 N8 115.839
C3 C4 H12 120.216 C4 C3 H11 118.626
C4 N8 C5 149.087 C4 N8 C7 122.372
C5 C6 C7 91.459 C5 C6 H14 135.227
C5 N8 C7 88.541 C6 C5 N8 91.459
C6 C5 H13 135.227 C6 C7 N8 88.541
C7 C1 H9 123.945 C7 C6 H14 133.314
N8 C4 H12 123.945 N8 C5 H13 133.314
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability