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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: HF/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/daug-cc-pVTZ
 hartrees
Energy at 0K-306.438368
Energy at 298.15K-306.444507
HF Energy-306.438368
Nuclear repulsion energy315.060550
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 HF/daug-cc-pVTZ
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 3395 3071 7.08      
2 A1 3345 3026 15.36      
3 A1 3328 3010 11.82      
4 A1 1838 1663 2.17      
5 A1 1707 1544 4.40      
6 A1 1594 1442 12.63      
7 A1 1544 1397 9.55      
8 A1 1273 1151 0.00      
9 A1 1172 1061 1.35      
10 A1 1158 1048 0.06      
11 A1 992 898 6.77      
12 A1 873 790 0.36      
13 A1 583 528 0.58      
14 A2 1101 996 0.00      
15 A2 1057 956 0.00      
16 A2 991 896 0.00      
17 A2 857 775 0.00      
18 A2 638 577 0.00      
19 A2 326 295 0.00      
20 B1 1031 932 12.56      
21 B1 846 765 126.69      
22 B1 811 734 7.72      
23 B1 393 355 4.12      
24 B1 263 238 15.56      
25 B2 3364 3044 1.07      
26 B2 3337 3019 33.12      
27 B2 3313 2997 0.22      
28 B2 1807 1635 3.21      
29 B2 1570 1421 5.83      
30 B2 1419 1284 5.62      
31 B2 1373 1242 9.06      
32 B2 1163 1052 3.55      
33 B2 1130 1022 0.01      
34 B2 955 864 0.96      
35 B2 704 636 0.50      
36 B2 455 411 4.52      

Unscaled Zero Point Vibrational Energy (zpe) 25851.8 cm-1
Scaled (by 0.9046) Zero Point Vibrational Energy (zpe) 23385.5 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 HF/daug-cc-pVTZ
ABC
0.16416 0.07439 0.05119

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.435 -0.610
C2 0.000 0.677 -1.832
C3 0.000 -0.677 -1.832
C4 0.000 -1.435 -0.610
C5 0.000 -0.665 2.028
C6 0.000 0.665 2.028
C7 0.000 0.710 0.514
C8 0.000 -0.710 0.514
H9 0.000 2.507 -0.632
H10 0.000 1.203 -2.768
H11 0.000 -1.203 -2.768
H12 0.000 -2.507 -0.632
H13 0.000 -1.406 2.801
H14 0.000 1.406 2.801

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43772.43982.86943.37242.74841.33782.42121.07292.16973.40783.94214.43913.4113
C21.43771.35422.43984.08723.86052.34642.72532.18871.07332.10023.40315.07984.6900
C32.43981.35421.43773.86054.08722.72532.34643.40312.10021.07332.18874.69005.0798
C42.86942.43981.43772.74843.37242.42121.33783.94213.40782.16971.07293.41134.4391
C53.37244.08723.86052.74841.33092.04551.51504.14055.14714.82603.23561.07022.2109
C62.74843.86054.08723.37241.33091.51502.04553.23564.82605.14714.14052.21091.0702
C71.33782.34642.72532.42122.04551.51501.41922.13193.31853.79843.41493.11542.3906
C82.42122.72532.34641.33781.51502.04551.41923.41493.79843.31852.13192.39063.1154
H91.07292.18873.40313.94214.14053.23562.13193.41492.50244.28135.01475.20563.6051
H102.16971.07332.10023.40785.14714.82603.31853.79842.50242.40654.28136.14955.5722
H113.40782.10021.07332.16974.82605.14713.79843.31854.28132.40652.50245.57226.1495
H123.94213.40312.18871.07293.23564.14053.41492.13195.01474.28132.50243.60515.2056
H134.43915.07984.69003.41131.07022.21093.11542.39065.20566.14955.57223.60512.8121
H143.41134.69005.07984.43912.21091.07022.39063.11543.60515.57226.14955.20562.8121

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.801 C1 C2 H10 118.842
C1 C7 C6 148.850 C1 C7 N8 122.820
C2 C1 C7 115.379 C2 C1 H9 120.648
C2 C3 C4 121.801 C2 C3 H11 119.357
C3 C2 H10 119.357 C3 C4 N8 115.379
C3 C4 H12 120.648 C4 C3 H11 118.842
C4 N8 C5 148.850 C4 N8 C7 122.820
C5 C6 C7 91.669 C5 C6 H14 133.789
C5 N8 C7 88.331 C6 C5 N8 91.669
C6 C5 H13 133.789 C6 C7 N8 88.331
C7 C1 H9 123.973 C7 C6 H14 134.541
N8 C4 H12 123.973 N8 C5 H13 134.541
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.877      
2 C -0.355      
3 C -0.355      
4 C -0.877      
5 C -1.140      
6 C -1.140      
7 C 1.104      
8 C 1.104      
9 H 0.349      
10 H 0.432      
11 H 0.432      
12 H 0.349      
13 H 0.488      
14 H 0.488      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.884 0.884
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.953 0.000 0.000
y 0.000 -41.137 0.000
z 0.000 0.000 -41.263
Traceless
 xyz
x -10.753 0.000 0.000
y 0.000 5.471 0.000
z 0.000 0.000 5.283
Polar
3z2-r210.566
x2-y2-10.816
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.042 0.000 0.000
y 0.000 14.196 0.000
z 0.000 0.000 16.830


<r2> (average value of r2) Å2
<r2> 218.050
(<r2>)1/2 14.767