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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: PBE1PBE/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 PBE1PBE/6-311G*
 hartrees
Energy at 0K-308.047173
Energy at 298.15K-308.052812
HF Energy-308.047173
Nuclear repulsion energy313.288899
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 PBE1PBE/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 3260 3125 14.09      
2 A1 3219 3086 17.98      
3 A1 3203 3070 11.76      
4 A1 1733 1661 3.56      
5 A1 1600 1534 1.00      
6 A1 1530 1467 2.74      
7 A1 1455 1395 11.69      
8 A1 1194 1144 0.00      
9 A1 1120 1074 0.03      
10 A1 1070 1026 1.12      
11 A1 995 954 5.22      
12 A1 829 795 0.48      
13 A1 552 529 0.16      
14 A2 962 922 0.00      
15 A2 914 876 0.00      
16 A2 877 840 0.00      
17 A2 781 748 0.00      
18 A2 585 561 0.00      
19 A2 295 283 0.00      
20 B1 909 872 8.49      
21 B1 748 717 124.14      
22 B1 717 687 1.42      
23 B1 361 346 2.84      
24 B1 231 222 14.58      
25 B2 3229 3095 3.55      
26 B2 3211 3078 37.53      
27 B2 3190 3058 0.01      
28 B2 1683 1613 0.43      
29 B2 1474 1412 4.39      
30 B2 1313 1258 5.46      
31 B2 1260 1208 13.15      
32 B2 1108 1062 2.31      
33 B2 1059 1015 0.60      
34 B2 882 845 0.66      
35 B2 657 630 0.87      
36 B2 424 407 4.48      

Unscaled Zero Point Vibrational Energy (zpe) 24314.1 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 23305.1 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 PBE1PBE/6-311G*
ABC
0.16221 0.07366 0.05066

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.437 -0.617
C2 0.000 0.683 -1.840
C3 0.000 -0.683 -1.840
C4 0.000 -1.437 -0.617
C5 0.000 -0.672 2.036
C6 0.000 0.672 2.036
C7 0.000 0.714 0.525
C8 0.000 -0.714 0.525
H9 0.000 2.522 -0.646
H10 0.000 1.220 -2.783
H11 0.000 -1.220 -2.783
H12 0.000 -2.522 -0.646
H13 0.000 -1.441 2.799
H14 0.000 1.441 2.799

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43642.44682.87333.38932.76121.35182.43531.08582.17633.42783.95884.46683.4163
C21.43641.36552.44684.10593.87592.36532.74672.19271.08552.12393.41995.10204.7005
C32.44681.36551.43643.87594.10592.74672.36533.41992.12391.08552.19274.70055.1020
C42.87332.44681.43642.76123.38932.43531.35183.95883.42782.17631.08583.41634.4668
C53.38934.10593.87592.76121.34462.05051.51144.17115.17724.84993.25821.08322.2469
C62.76123.87594.10593.38931.34461.51142.05053.25824.84995.17724.17112.24691.0832
C71.35182.36532.74672.43532.05051.51141.42822.15433.34653.83213.44163.13292.3872
C82.43532.74672.36531.35181.51142.05051.42823.44163.83213.34652.15432.38723.1329
H91.08582.19273.41993.95884.17113.25822.15433.44162.50194.30945.04415.25133.6108
H102.17631.08552.12393.42785.17724.84993.34653.83212.50192.44084.30946.18395.5862
H113.42782.12391.08552.17634.84995.17723.83213.34654.30942.44082.50195.58626.1839
H123.95883.41992.19271.08583.25824.17113.44162.15435.04414.30942.50193.61085.2513
H134.46685.10204.70053.41631.08322.24693.13292.38725.25136.18395.58623.61082.8823
H143.41634.70055.10204.46682.24691.08322.38723.13293.61085.58626.18395.25132.8823

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.660 C1 C2 H10 118.648
C1 C7 C6 149.271 C1 C7 N8 122.313
C2 C1 C7 116.027 C2 C1 H9 120.134
C2 C3 C4 121.660 C2 C3 H11 119.692
C3 C2 H10 119.692 C3 C4 N8 116.027
C3 C4 H12 120.134 C4 C3 H11 118.648
C4 N8 C5 149.271 C4 N8 C7 122.313
C5 C6 C7 91.584 C5 C6 H14 135.219
C5 N8 C7 88.416 C6 C5 N8 91.584
C6 C5 H13 135.219 C6 C7 N8 88.416
C7 C1 H9 123.839 C7 C6 H14 133.196
N8 C4 H12 123.839 N8 C5 H13 133.196
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.247      
2 C -0.214      
3 C -0.214      
4 C -0.247      
5 C -0.217      
6 C -0.217      
7 C 0.061      
8 C 0.061      
9 H 0.205      
10 H 0.203      
11 H 0.203      
12 H 0.205      
13 H 0.208      
14 H 0.208      


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 0.691 0.691
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.039 0.000 0.000
y 0.000 -40.372 0.000
z 0.000 0.000 -39.645
Traceless
 xyz
x -11.030 0.000 0.000
y 0.000 4.970 0.000
z 0.000 0.000 6.060
Polar
3z2-r212.121
x2-y2-10.667
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.150 0.000 0.000
y 0.000 13.358 0.000
z 0.000 0.000 16.188


<r2> (average value of r2) Å2
<r2> 219.468
(<r2>)1/2 14.814