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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B3LYP/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 B3LYP/6-31G
 hartrees
Energy at 0K-308.283946
Energy at 298.15K-308.289676
HF Energy-308.283946
Nuclear repulsion energy310.873244
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 B3LYP/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 3293 3167 16.74      
2 A1 3225 3102 16.95      
3 A1 3206 3084 18.22      
4 A1 1716 1651 1.70      
5 A1 1570 1511 1.49      
6 A1 1511 1454 1.08      
7 A1 1463 1407 13.12      
8 A1 1226 1180 0.00      
9 A1 1108 1066 0.00      
10 A1 1088 1047 0.62      
11 A1 991 954 2.96      
12 A1 819 788 0.13      
13 A1 557 536 0.07      
14 A2 998 960 0.00      
15 A2 936 901 0.00      
16 A2 902 868 0.00      
17 A2 786 756 0.00      
18 A2 592 569 0.00      
19 A2 307 295 0.00      
20 B1 943 907 9.83      
21 B1 773 744 115.45      
22 B1 738 710 6.11      
23 B1 380 366 2.78      
24 B1 236 227 10.32      
25 B2 3258 3134 1.42      
26 B2 3217 3095 39.73      
27 B2 3191 3070 0.39      
28 B2 1668 1605 0.18      
29 B2 1487 1430 4.79      
30 B2 1337 1286 1.08      
31 B2 1275 1227 12.41      
32 B2 1116 1074 1.67      
33 B2 1073 1032 1.32      
34 B2 878 845 0.20      
35 B2 672 646 0.50      
36 B2 419 403 4.19      

Unscaled Zero Point Vibrational Energy (zpe) 24476.6 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 23546.5 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 B3LYP/6-31G
ABC
0.15994 0.07236 0.04982

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.448 -0.623
C2 0.000 0.689 -1.857
C3 0.000 -0.689 -1.857
C4 0.000 -1.448 -0.623
C5 0.000 -0.680 2.057
C6 0.000 0.680 2.057
C7 0.000 0.722 0.528
C8 0.000 -0.722 0.528
H9 0.000 2.532 -0.654
H10 0.000 1.229 -2.798
H11 0.000 -1.229 -2.798
H12 0.000 -2.532 -0.654
H13 0.000 -1.447 2.819
H14 0.000 1.447 2.819

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44772.46692.89513.42232.78871.36122.45641.08532.18593.44883.98014.49723.4423
C21.44771.37802.46694.14643.91402.38512.77102.20091.08572.13683.43855.14004.7363
C32.46691.37801.44773.91404.14642.77102.38513.43852.13681.08572.20094.73635.1400
C42.89512.46691.44772.78873.42232.45641.36123.98013.44882.18591.08533.44234.4972
C53.42234.14643.91402.78871.35932.07441.52984.20365.21754.88693.28421.08072.2584
C62.78873.91404.14643.42231.35931.52982.07443.28424.88695.21754.20362.25841.0807
C71.36122.38512.77102.45642.07441.52981.44412.16233.36513.85663.46263.15432.4024
C82.45642.77102.38511.36121.52982.07441.44413.46263.85663.36512.16232.40243.1543
H91.08532.20093.43853.98014.20363.28422.16233.46262.50934.32965.06485.28153.6388
H102.18591.08572.13683.44885.21754.88693.36513.85662.50932.45804.32966.22195.6215
H113.44882.13681.08572.18594.88695.21753.85663.36514.32962.45802.50935.62156.2219
H123.98013.43852.20091.08533.28424.20363.46262.16235.06484.32962.50933.63885.2815
H134.49725.14004.73633.44231.08072.25843.15432.40245.28156.22195.62153.63882.8932
H143.44234.73635.14004.49722.25841.08072.40243.15433.63885.62156.22195.28152.8932

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.597 C1 C2 H10 118.578
C1 C7 C6 149.382 C1 C7 N8 122.207
C2 C1 C7 116.196 C2 C1 H9 119.974
C2 C3 C4 121.597 C2 C3 H11 119.825
C3 C2 H10 119.825 C3 C4 N8 116.196
C3 C4 H12 119.974 C4 C3 H11 118.578
C4 N8 C5 149.382 C4 N8 C7 122.207
C5 C6 C7 91.589 C5 C6 H14 135.211
C5 N8 C7 88.411 C6 C5 N8 91.589
C6 C5 H13 135.211 C6 C7 N8 88.411
C7 C1 H9 123.830 C7 C6 H14 133.200
N8 C4 H12 123.830 N8 C5 H13 133.200
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.166      
2 C -0.134      
3 C -0.134      
4 C -0.166      
5 C -0.082      
6 C -0.082      
7 C -0.025      
8 C -0.025      
9 H 0.131      
10 H 0.120      
11 H 0.120      
12 H 0.131      
13 H 0.156      
14 H 0.156      


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 0.590 0.590
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.976 0.000 0.000
y 0.000 -40.901 0.000
z 0.000 0.000 -40.104
Traceless
 xyz
x -9.473 0.000 0.000
y 0.000 4.139 0.000
z 0.000 0.000 5.334
Polar
3z2-r210.668
x2-y2-9.075
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.653 0.000 0.000
y 0.000 12.888 0.000
z 0.000 0.000 15.472


<r2> (average value of r2) Å2
<r2> 222.526
(<r2>)1/2 14.917