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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: HF/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-306.444704
Energy at 298.15K-306.450850
HF Energy-306.444704
Nuclear repulsion energy315.100060
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/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3397 3079 8.29      
2 A1 3347 3034 16.56      
3 A1 3329 3018 13.21      
4 A1 1840 1668 3.66      
5 A1 1711 1551 2.92      
6 A1 1595 1446 11.64      
7 A1 1545 1401 10.83      
8 A1 1274 1155 0.00      
9 A1 1173 1063 1.25      
10 A1 1158 1050 0.11      
11 A1 992 899 6.56      
12 A1 873 792 0.45      
13 A1 584 529 0.54      
14 A2 1088 987 0.00      
15 A2 1058 959 0.00      
16 A2 988 895 0.00      
17 A2 851 772 0.00      
18 A2 636 577 0.00      
19 A2 326 296 0.00      
20 B1 1026 930 13.28      
21 B1 846 766 122.83      
22 B1 811 735 9.00      
23 B1 393 356 3.95      
24 B1 263 239 15.72      
25 B2 3366 3051 1.08      
26 B2 3339 3026 34.56      
27 B2 3315 3004 0.25      
28 B2 1809 1640 3.07      
29 B2 1572 1425 6.40      
30 B2 1421 1288 5.52      
31 B2 1374 1245 9.00      
32 B2 1163 1054 3.30      
33 B2 1130 1024 0.01      
34 B2 955 865 1.04      
35 B2 704 638 0.48      
36 B2 455 412 4.60      

Unscaled Zero Point Vibrational Energy (zpe) 25852.4 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 23432.6 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/Def2TZVPP
ABC
0.16424 0.07439 0.05120

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.428 -0.613
C2 0.000 0.677 -1.828
C3 0.000 -0.677 -1.828
C4 0.000 -1.428 -0.613
C5 0.000 -0.663 2.028
C6 0.000 0.663 2.028
C7 0.000 0.705 0.513
C8 0.000 -0.705 0.513
H9 0.000 2.500 -0.631
H10 0.000 1.201 -2.764
H11 0.000 -1.201 -2.764
H12 0.000 -2.500 -0.631
H13 0.000 -1.406 2.796
H14 0.000 1.406 2.796

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.42892.43092.85673.36832.74881.33802.41151.07172.16303.39683.92834.43303.4087
C21.42891.35392.43094.08183.85552.34082.71792.18081.07222.09783.39485.07144.6811
C32.43091.35391.42893.85554.08182.71792.34083.39482.09781.07222.18084.68115.0714
C42.85672.43091.42892.74883.36832.41151.33803.92833.39682.16301.07173.40874.4330
C53.36834.08183.85552.74881.32662.04101.51554.13215.14094.82113.23141.06862.2072
C62.74883.85554.08183.36831.32661.51552.04103.23144.82115.14094.13212.20721.0686
C71.33802.34082.71792.41152.04101.51551.40902.12883.31363.78993.40243.10922.3886
C82.41152.71792.34081.33801.51552.04101.40903.40243.78993.31362.12882.38863.1092
H91.07172.18083.39483.92834.13213.23142.12883.40242.49714.27104.99985.19623.5975
H102.16301.07222.09783.39685.14094.82113.31363.78992.49712.40134.27106.14025.5633
H113.39682.09781.07222.16304.82115.14093.78993.31364.27102.40132.49715.56336.1402
H123.92833.39482.18081.07173.23144.13213.40242.12884.99984.27102.49713.59755.1962
H134.43305.07144.68113.40871.06862.20723.10922.38865.19626.14025.56333.59752.8116
H143.40874.68115.07144.43302.20721.06862.38863.10923.59755.56336.14025.19622.8116

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.728 C1 C2 H10 119.032
C1 C7 C6 148.807 C1 C7 N8 122.752
C2 C1 C7 115.519 C2 C1 H9 120.739
C2 C3 C4 121.728 C2 C3 H11 119.240
C3 C2 H10 119.240 C3 C4 N8 115.519
C3 C4 H12 120.739 C4 C3 H11 119.032
C4 N8 C5 148.807 C4 N8 C7 122.752
C5 C6 C7 91.559 C5 C6 H14 134.017
C5 N8 C7 88.441 C6 C5 N8 91.559
C6 C5 H13 134.017 C6 C7 N8 88.441
C7 C1 H9 123.742 C7 C6 H14 134.424
N8 C4 H12 123.742 N8 C5 H13 134.424
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.077      
2 C -0.081      
3 C -0.081      
4 C -0.077      
5 C -0.146      
6 C -0.146      
7 C -0.017      
8 C -0.017      
9 H 0.090      
10 H 0.089      
11 H 0.089      
12 H 0.090      
13 H 0.141      
14 H 0.141      


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 0.885 0.885
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.834 0.000 0.000
y 0.000 -41.017 0.000
z 0.000 0.000 -40.875
Traceless
 xyz
x -10.888 0.000 0.000
y 0.000 5.338 0.000
z 0.000 0.000 5.551
Polar
3z2-r211.101
x2-y2-10.818
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.187 0.000 0.000
y 0.000 13.840 0.000
z 0.000 0.000 15.971


<r2> (average value of r2) Å2
<r2> 217.881
(<r2>)1/2 14.761