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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B1B95/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-31+G**
 hartrees
Energy at 0K-308.240651
Energy at 298.15K-308.246283
HF Energy-308.240651
Nuclear repulsion energy313.364106
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 B1B95/6-31+G**
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 3284 3141 9.79      
2 A1 3240 3099 12.23      
3 A1 3225 3085 10.74      
4 A1 1736 1661 1.40      
5 A1 1607 1538 3.06      
6 A1 1534 1467 3.74      
7 A1 1456 1393 9.09      
8 A1 1191 1139 0.00      
9 A1 1126 1078 0.08      
10 A1 1074 1028 1.04      
11 A1 998 955 5.71      
12 A1 831 795 0.32      
13 A1 546 522 0.16      
14 A2 979 937 0.00      
15 A2 927 887 0.00      
16 A2 886 847 0.00      
17 A2 765 732 0.00      
18 A2 580 555 0.00      
19 A2 292 280 0.00      
20 B1 926 886 8.57      
21 B1 754 721 132.12      
22 B1 724 693 0.71      
23 B1 359 344 2.86      
24 B1 232 222 13.21      
25 B2 3253 3112 1.41      
26 B2 3233 3093 28.49      
27 B2 3212 3073 0.03      
28 B2 1685 1612 0.53      
29 B2 1469 1405 2.94      
30 B2 1311 1254 6.31      
31 B2 1260 1206 10.98      
32 B2 1106 1058 2.61      
33 B2 1055 1010 0.75      
34 B2 876 838 0.75      
35 B2 648 620 0.81      
36 B2 422 404 4.36      

Unscaled Zero Point Vibrational Energy (zpe) 24402.3 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 23343.2 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 B1B95/6-31+G**
ABC
0.16190 0.07381 0.05070

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.439 -0.617
C2 0.000 0.684 -1.838
C3 0.000 -0.684 -1.838
C4 0.000 -1.439 -0.617
C5 0.000 -0.673 2.034
C6 0.000 0.673 2.034
C7 0.000 0.714 0.526
C8 0.000 -0.714 0.526
H9 0.000 2.522 -0.645
H10 0.000 1.220 -2.780
H11 0.000 -1.220 -2.780
H12 0.000 -2.522 -0.645
H13 0.000 -1.440 2.796
H14 0.000 1.440 2.796

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43622.44902.87743.38902.75951.35292.43671.08392.17413.42783.96104.46473.4123
C21.43621.36752.44904.10343.87282.36422.74622.19181.08362.12413.42095.09784.6955
C32.44901.36751.43623.87284.10342.74622.36423.42092.12411.08362.19184.69555.0978
C42.87742.44901.43622.75953.38902.43671.35293.96103.42782.17411.08393.41234.4647
C53.38904.10343.87282.75951.34522.04901.50944.16975.17294.84523.25581.08132.2460
C62.75953.87284.10343.38901.34521.50942.04903.25584.84525.17294.16972.24601.0813
C71.35292.36422.74622.43672.04901.50941.42742.15433.34393.82963.44113.12952.3836
C82.43672.74622.36421.35291.50942.04901.42743.44113.82963.34392.15432.38363.1295
H91.08392.19183.42093.96104.16973.25582.15433.44112.50034.30875.04445.24803.6068
H102.17411.08362.12413.42785.17294.84523.34393.82962.50032.44094.30876.17785.5798
H113.42782.12411.08362.17414.84525.17293.82963.34394.30872.44092.50035.57986.1778
H123.96103.42092.19181.08393.25584.16973.44112.15435.04444.30872.50033.60685.2480
H134.46475.09784.69553.41231.08132.24603.12952.38365.24806.17785.57983.60682.8808
H143.41234.69555.09784.46472.24601.08132.38363.12953.60685.57986.17785.24802.8808

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.712 C1 C2 H10 118.598
C1 C7 C6 149.157 C1 C7 N8 122.404
C2 C1 C7 115.884 C2 C1 H9 120.211
C2 C3 C4 121.712 C2 C3 H11 119.690
C3 C2 H10 119.690 C3 C4 N8 115.884
C3 C4 H12 120.211 C4 C3 H11 118.598
C4 N8 C5 149.157 C4 N8 C7 122.404
C5 C6 C7 91.561 C5 C6 H14 135.245
C5 N8 C7 88.439 C6 C5 N8 91.561
C6 C5 H13 135.245 C6 C7 N8 88.439
C7 C1 H9 123.905 C7 C6 H14 133.194
N8 C4 H12 123.905 N8 C5 H13 133.194
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.148      
2 C -0.081      
3 C -0.081      
4 C -0.148      
5 C -0.173      
6 C -0.173      
7 C -0.057      
8 C -0.057      
9 H 0.152      
10 H 0.145      
11 H 0.145      
12 H 0.152      
13 H 0.162      
14 H 0.162      


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 0.676 0.676
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.101 0.000 0.000
y 0.000 -40.811 0.000
z 0.000 0.000 -40.612
Traceless
 xyz
x -10.390 0.000 0.000
y 0.000 5.046 0.000
z 0.000 0.000 5.344
Polar
3z2-r210.688
x2-y2-10.291
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.244 0.000 0.000
y 0.000 14.084 0.000
z 0.000 0.000 17.042


<r2> (average value of r2) Å2
<r2> 219.602
(<r2>)1/2 14.819