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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B1B95/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-311G*
 hartrees
Energy at 0K-308.279167
Energy at 298.15K-308.284796
HF Energy-308.279167
Nuclear repulsion energy313.966926
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 B1B95/6-311G*
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 3263 3128 15.99      
2 A1 3223 3090 19.30      
3 A1 3207 3074 13.28      
4 A1 1736 1664 3.27      
5 A1 1607 1540 1.03      
6 A1 1530 1467 2.87      
7 A1 1457 1397 10.84      
8 A1 1195 1145 0.01      
9 A1 1121 1074 0.06      
10 A1 1072 1028 0.82      
11 A1 996 954 5.00      
12 A1 829 795 0.53      
13 A1 548 525 0.15      
14 A2 965 925 0.00      
15 A2 917 879 0.00      
16 A2 879 843 0.00      
17 A2 778 745 0.00      
18 A2 583 558 0.00      
19 A2 294 282 0.00      
20 B1 911 874 8.28      
21 B1 749 718 120.81      
22 B1 720 690 0.75      
23 B1 359 344 2.74      
24 B1 232 222 13.76      
25 B2 3232 3098 4.16      
26 B2 3215 3082 40.91      
27 B2 3194 3062 0.03      
28 B2 1685 1615 0.41      
29 B2 1474 1413 4.09      
30 B2 1314 1259 5.34      
31 B2 1261 1209 12.61      
32 B2 1107 1061 2.09      
33 B2 1057 1013 0.73      
34 B2 879 843 0.64      
35 B2 652 625 0.88      
36 B2 421 403 4.31      

Unscaled Zero Point Vibrational Energy (zpe) 24329.8 cm-1
Scaled (by 0.9586) Zero Point Vibrational Energy (zpe) 23322.6 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 B1B95/6-311G*
ABC
0.16283 0.07400 0.05088

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.434 -0.616
C2 0.000 0.681 -1.835
C3 0.000 -0.681 -1.835
C4 0.000 -1.434 -0.616
C5 0.000 -0.670 2.031
C6 0.000 0.670 2.031
C7 0.000 0.713 0.524
C8 0.000 -0.713 0.524
H9 0.000 2.517 -0.645
H10 0.000 1.217 -2.776
H11 0.000 -1.217 -2.776
H12 0.000 -2.517 -0.645
H13 0.000 -1.438 2.792
H14 0.000 1.438 2.792

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43302.44142.86833.38182.75501.34862.43031.08322.17093.41983.95124.45673.4080
C21.43301.36222.44144.09563.86622.35862.73942.18791.08292.11873.41235.08924.6886
C32.44141.36221.43303.86624.09562.73942.35863.41232.11871.08292.18794.68865.0892
C42.86832.44141.43302.75503.38182.43031.34863.95123.41982.17091.08323.40804.4567
C53.38184.09563.86622.75501.34092.04601.50844.16185.16444.83813.25121.08062.2412
C62.75503.86624.09563.38181.34091.50842.04603.25124.83815.16444.16182.24121.0806
C71.34862.35862.73942.43032.04601.50841.42502.14953.33763.82223.43423.12582.3818
C82.43032.73942.35861.34861.50842.04601.42503.43423.82223.33762.14952.38183.1258
H91.08322.18793.41233.95124.16183.25122.14953.43422.49624.29945.03395.23943.6025
H102.17091.08292.11873.41985.16444.83813.33763.82222.49622.43434.29946.16865.5724
H113.41982.11871.08292.17094.83815.16443.82223.33764.29942.43432.49625.57246.1686
H123.95123.41232.18791.08323.25124.16183.43422.14955.03394.29942.49623.60255.2394
H134.45675.08924.68863.40801.08062.24123.12582.38185.23946.16865.57243.60252.8752
H143.40804.68865.08924.45672.24121.08062.38183.12583.60255.57246.16865.23942.8752

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.704 C1 C2 H10 118.623
C1 C7 C6 149.247 C1 C7 N8 122.351
C2 C1 C7 115.945 C2 C1 H9 120.174
C2 C3 C4 121.704 C2 C3 H11 119.673
C3 C2 H10 119.673 C3 C4 N8 115.945
C3 C4 H12 120.174 C4 C3 H11 118.623
C4 N8 C5 149.247 C4 N8 C7 122.351
C5 C6 C7 91.598 C5 C6 H14 135.231
C5 N8 C7 88.402 C6 C5 N8 91.598
C6 C5 H13 135.231 C6 C7 N8 88.402
C7 C1 H9 123.881 C7 C6 H14 133.171
N8 C4 H12 123.881 N8 C5 H13 133.171
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.234      
2 C -0.216      
3 C -0.216      
4 C -0.234      
5 C -0.213      
6 C -0.213      
7 C 0.047      
8 C 0.047      
9 H 0.205      
10 H 0.202      
11 H 0.202      
12 H 0.205      
13 H 0.209      
14 H 0.209      


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 0.688 0.688
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.753 0.000 0.000
y 0.000 -40.354 0.000
z 0.000 0.000 -39.667
Traceless
 xyz
x -10.743 0.000 0.000
y 0.000 4.856 0.000
z 0.000 0.000 5.887
Polar
3z2-r211.774
x2-y2-10.400
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.116 0.000 0.000
y 0.000 13.303 0.000
z 0.000 0.000 16.108


<r2> (average value of r2) Å2
<r2> 218.572
(<r2>)1/2 14.784