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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: MP2/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-307.392701
Energy at 298.15K-307.398110
HF Energy-306.355160
Nuclear repulsion energy309.788228
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/cc-pVDZ
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 3275 3119 8.50      
2 A1 3242 3088 11.52      
3 A1 3226 3073 8.18      
4 A1 1701 1620 1.63      
5 A1 1538 1465 0.24      
6 A1 1523 1451 2.95      
7 A1 1437 1368 9.41      
8 A1 1176 1120 0.16      
9 A1 1128 1074 0.12      
10 A1 1050 1000 0.74      
11 A1 1000 952 3.29      
12 A1 812 773 0.48      
13 A1 540 515 0.05      
14 A2 925 881 0.00      
15 A2 874 833 0.00      
16 A2 837 797 0.00      
17 A2 603 574 0.00      
18 A2 544 518 0.00      
19 A2 287 273 0.00      
20 B1 885 843 3.65      
21 B1 738 702 78.47      
22 B1 694 661 17.73      
23 B1 343 327 1.88      
24 B1 221 210 11.36      
25 B2 3245 3091 1.28      
26 B2 3234 3081 22.65      
27 B2 3213 3061 0.05      
28 B2 1651 1572 0.62      
29 B2 1461 1392 3.23      
30 B2 1291 1230 5.28      
31 B2 1241 1182 14.48      
32 B2 1105 1053 1.29      
33 B2 1036 987 1.44      
34 B2 859 818 0.54      
35 B2 644 614 1.47      
36 B2 413 393 3.37      

Unscaled Zero Point Vibrational Energy (zpe) 23993.8 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 22854.1 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/cc-pVDZ
ABC
0.15806 0.07218 0.04955

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.456 -0.628
C2 0.000 0.695 -1.858
C3 0.000 -0.695 -1.858
C4 0.000 -1.456 -0.628
C5 0.000 -0.685 2.059
C6 0.000 0.685 2.059
C7 0.000 0.722 0.533
C8 0.000 -0.722 0.533
H9 0.000 2.551 -0.659
H10 0.000 1.236 -2.810
H11 0.000 -1.236 -2.810
H12 0.000 -2.551 -0.659
H13 0.000 -1.463 2.830
H14 0.000 1.463 2.830

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44672.47772.91243.43642.79601.37382.46851.09562.19323.46544.00774.52533.4580
C21.44671.38932.47774.15353.91762.39152.77952.21051.09522.15253.46065.16074.7506
C32.47771.38931.44673.91764.15352.77952.39153.46062.15251.09522.21054.75065.1607
C42.91242.47771.44672.79603.43642.46851.37384.00773.46542.19321.09563.45804.5253
C53.43644.15353.91762.79601.37052.07621.52684.22665.23504.90073.29711.09462.2820
C62.79603.91764.15353.43641.37051.52682.07623.29714.90075.23504.22662.28201.0946
C71.37382.39152.77952.46852.07621.52681.44432.18333.38263.87463.48383.17002.4132
C82.46852.77952.39151.37381.52682.07621.44433.48383.87463.38262.18332.41323.1700
H91.09562.21053.46064.00774.22663.29712.18333.48382.52194.35585.10285.31833.6545
H102.19321.09522.15253.46545.23504.90073.38263.87462.52192.47184.35586.25255.6447
H113.46542.15251.09522.19324.90075.23503.87463.38264.35582.47182.52195.64476.2525
H124.00773.46062.21051.09563.29714.22663.48382.18335.10284.35582.52193.65455.3183
H134.52535.16074.75063.45801.09462.28203.17002.41325.31836.25255.64473.65452.9255
H143.45804.75065.16074.52532.28201.09462.41323.17003.65455.64476.25255.31832.9255

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.762 C1 C2 H10 118.622
C1 C7 C6 149.089 C1 C7 N8 122.297
C2 C1 C7 115.941 C2 C1 H9 120.162
C2 C3 C4 121.762 C2 C3 H11 119.616
C3 C2 H10 119.616 C3 C4 N8 115.941
C3 C4 H12 120.162 C4 C3 H11 118.622
C4 N8 C5 149.089 C4 N8 C7 122.297
C5 C6 C7 91.386 C5 C6 H14 135.260
C5 N8 C7 88.614 C6 C5 N8 91.386
C6 C5 H13 135.260 C6 C7 N8 88.614
C7 C1 H9 123.897 C7 C6 H14 133.354
N8 C4 H12 123.897 N8 C5 H13 133.354
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability