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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: BLYP/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 BLYP/6-31G
 hartrees
Energy at 0K-308.153340
Energy at 298.15K-308.158833
HF Energy-308.153340
Nuclear repulsion energy308.527426
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 BLYP/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 3203 3179 23.02      
2 A1 3140 3116 22.84      
3 A1 3121 3097 19.26      
4 A1 1651 1639 1.44      
5 A1 1504 1492 2.15      
6 A1 1458 1447 0.39      
7 A1 1415 1405 9.91      
8 A1 1194 1185 0.00      
9 A1 1068 1060 0.10      
10 A1 1055 1047 0.47      
11 A1 959 952 2.23      
12 A1 789 783 0.04      
13 A1 540 536 0.09      
14 A2 948 941 0.00      
15 A2 886 880 0.00      
16 A2 854 847 0.00      
17 A2 758 752 0.00      
18 A2 570 566 0.00      
19 A2 297 295 0.00      
20 B1 897 891 8.13      
21 B1 741 736 97.75      
22 B1 707 702 7.77      
23 B1 366 364 2.26      
24 B1 227 225 8.93      
25 B2 3169 3145 3.51      
26 B2 3131 3108 50.88      
27 B2 3107 3083 0.25      
28 B2 1597 1585 0.06      
29 B2 1440 1429 3.72      
30 B2 1297 1288 0.57      
31 B2 1233 1224 11.79      
32 B2 1079 1071 1.35      
33 B2 1034 1026 1.61      
34 B2 844 837 0.06      
35 B2 651 646 0.52      
36 B2 402 399 3.82      

Unscaled Zero Point Vibrational Energy (zpe) 23667.3 cm-1
Scaled (by 0.9924) Zero Point Vibrational Energy (zpe) 23487.4 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 BLYP/6-31G
ABC
0.15749 0.07128 0.04907

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.459 -0.628
C2 0.000 0.695 -1.870
C3 0.000 -0.695 -1.870
C4 0.000 -1.459 -0.628
C5 0.000 -0.686 2.072
C6 0.000 0.686 2.072
C7 0.000 0.729 0.534
C8 0.000 -0.729 0.534
H9 0.000 2.552 -0.660
H10 0.000 1.240 -2.819
H11 0.000 -1.240 -2.819
H12 0.000 -2.552 -0.660
H13 0.000 -1.460 2.837
H14 0.000 1.460 2.837

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.45822.48612.91713.44812.80801.37262.47701.09352.20143.47594.01024.53053.4650
C21.45821.38992.48614.17703.94202.40492.79452.21611.09392.15513.46475.17724.7690
C32.48611.38991.45823.94204.17702.79452.40493.46472.15511.09392.21614.76905.1772
C42.91712.48611.45822.80803.44812.47701.37264.01023.47592.20141.09353.46504.5305
C53.44814.17703.94202.80801.37282.08951.53794.23655.25624.92163.30801.08832.2790
C62.80803.94204.17703.44811.37281.53792.08953.30804.92165.25624.23652.27901.0883
C71.37262.40492.79452.47702.08951.53791.45742.17953.39183.88843.49113.17702.4159
C82.47702.79452.40491.37261.53792.08951.45743.49113.88843.39182.17952.41593.1770
H91.09352.21613.46474.01024.23653.30802.17953.49112.52554.36315.10315.32223.6635
H102.20141.09392.15513.47595.25624.92163.39183.88842.52552.48054.36316.26725.6598
H113.47592.15511.09392.20144.92165.25623.88843.39184.36312.48052.52555.65986.2672
H124.01023.46472.21611.09353.30804.23653.49112.17955.10314.36312.52553.66355.3222
H134.53055.17724.76903.46501.08832.27903.17702.41595.32226.26725.65983.66352.9206
H143.46504.76905.17724.53052.27901.08832.41593.17703.66355.65986.26725.32222.9206

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.578 C1 C2 H10 118.522
C1 C7 C6 149.456 C1 C7 N8 122.122
C2 C1 C7 116.300 C2 C1 H9 119.889
C2 C3 C4 121.578 C2 C3 H11 119.900
C3 C2 H10 119.900 C3 C4 N8 116.300
C3 C4 H12 119.889 C4 C3 H11 118.522
C4 N8 C5 149.456 C4 N8 C7 122.122
C5 C6 C7 91.578 C5 C6 H14 135.325
C5 N8 C7 88.422 C6 C5 N8 91.578
C6 C5 H13 135.325 C6 C7 N8 88.422
C7 C1 H9 123.811 C7 C6 H14 133.097
N8 C4 H12 123.811 N8 C5 H13 133.097
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.159      
2 C -0.103      
3 C -0.103      
4 C -0.159      
5 C -0.074      
6 C -0.074      
7 C 0.022      
8 C 0.022      
9 H 0.100      
10 H 0.091      
11 H 0.091      
12 H 0.100      
13 H 0.123      
14 H 0.123      


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 0.578 0.578
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.768 0.000 0.000
y 0.000 -41.269 0.000
z 0.000 0.000 -40.431
Traceless
 xyz
x -8.918 0.000 0.000
y 0.000 3.830 0.000
z 0.000 0.000 5.087
Polar
3z2-r210.175
x2-y2-8.499
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.694 0.000 0.000
y 0.000 13.181 0.000
z 0.000 0.000 16.232


<r2> (average value of r2) Å2
<r2> 225.588
(<r2>)1/2 15.020