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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: MP2/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-31G
 hartrees
Energy at 0K-306.909734
Energy at 298.15K 
HF Energy-306.209703
Nuclear repulsion energy307.980459
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 MP2/6-31G
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 3265 3124 18.27      
2 A1 3209 3071 21.58      
3 A1 3189 3052 11.59      
4 A1 1673 1601 0.93      
5 A1 1501 1436 2.65      
6 A1 1484 1420 2.55      
7 A1 1442 1380 9.87      
8 A1 1230 1177 0.00      
9 A1 1096 1049 0.01      
10 A1 1086 1039 0.30      
11 A1 982 939 1.94      
12 A1 801 766 0.14      
13 A1 545 521 0.01      
14 A2 846 810 0.00      
15 A2 827 792 0.00      
16 A2 705 674 0.00      
17 A2 484 463 0.00      
18 A2 277 265 0.00      
19 A2 407i 389i 0.00      
20 B1 802 767 4.17      
21 B1 720 689 82.50      
22 B1 608 581 61.00      
23 B1 320 306 0.27      
24 B1 133 127 7.09      
25 B2 3233 3093 4.15      
26 B2 3199 3061 39.45      
27 B2 3176 3039 0.00      
28 B2 1637 1566 1.08      
29 B2 1478 1415 4.24      
30 B2 1327 1270 0.52      
31 B2 1268 1213 15.19      
32 B2 1115 1067 1.01      
33 B2 1064 1018 1.84      
34 B2 855 818 0.06      
35 B2 665 636 1.33      
36 B2 398 381 3.30      

Unscaled Zero Point Vibrational Energy (zpe) 23116.7 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 22118.1 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 MP2/6-31G
ABC
0.15669 0.07108 0.04890

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.464 -0.631
C2 0.000 0.697 -1.872
C3 0.000 -0.697 -1.872
C4 0.000 -1.464 -0.631
C5 0.000 -0.690 2.077
C6 0.000 0.690 2.077
C7 0.000 0.730 0.533
C8 0.000 -0.730 0.533
H9 0.000 2.555 -0.664
H10 0.000 1.238 -2.820
H11 0.000 -1.238 -2.820
H12 0.000 -2.555 -0.664
H13 0.000 -1.460 2.845
H14 0.000 1.460 2.845

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.45842.49202.92763.46012.81671.37572.48381.09182.20053.47724.01904.54213.4763
C21.45841.39482.49204.18553.94902.40492.79662.21611.09142.15523.46965.18684.7782
C32.49201.39481.45843.94904.18552.79662.40493.46962.15521.09142.21614.77825.1868
C42.92762.49201.45842.81673.46012.48381.37574.01903.47722.20051.09183.47634.5421
C53.46014.18553.94902.81671.37942.09801.54494.24745.26294.92773.31541.08742.2824
C62.81673.94904.18553.46011.37941.54492.09803.31544.92775.26294.24742.28241.0874
C71.37572.40492.79662.48382.09801.54491.46082.18203.39103.88793.49663.18482.4246
C82.48382.79662.40491.37571.54492.09801.46083.49663.88793.39102.18202.42463.1848
H91.09182.21613.46964.01904.24743.31542.18203.49662.52684.36325.11025.33193.6759
H102.20051.09142.15523.47725.26294.92773.39103.88792.52682.47604.36326.27465.6695
H113.47722.15521.09142.20054.92775.26293.88793.39104.36322.47602.52685.66956.2746
H124.01903.46962.21611.09183.31544.24743.49662.18205.11024.36322.52683.67595.3319
H134.54215.18684.77823.47631.08742.28243.18482.42465.33196.27465.66953.67592.9191
H143.47634.77825.18684.54212.28241.08742.42463.18483.67595.66956.27465.33192.9191

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.703 C1 C2 H10 118.605
C1 C7 C6 149.295 C1 C7 N8 122.215
C2 C1 C7 116.081 C2 C1 H9 119.995
C2 C3 C4 121.703 C2 C3 H11 119.691
C3 C2 H10 119.691 C3 C4 N8 116.081
C3 C4 H12 119.995 C4 C3 H11 118.605
C4 N8 C5 149.295 C4 N8 C7 122.215
C5 C6 C7 91.510 C5 C6 H14 135.068
C5 N8 C7 88.490 C6 C5 N8 91.510
C6 C5 H13 135.068 C6 C7 N8 88.490
C7 C1 H9 123.924 C7 C6 H14 133.422
N8 C4 H12 123.924 N8 C5 H13 133.422
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability