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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: HSEh1PBE/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HSEh1PBE/STO-3G
 hartrees
Energy at 0K-304.284746
Energy at 298.15K-304.290119
HF Energy-304.284746
Nuclear repulsion energy310.235529
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 HSEh1PBE/STO-3G
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 3554 3139 5.71      
2 A1 3523 3111 7.99      
3 A1 3511 3101 0.00      
4 A1 1858 1641 0.79      
5 A1 1725 1523 0.84      
6 A1 1616 1427 0.57      
7 A1 1550 1369 25.15      
8 A1 1267 1119 0.43      
9 A1 1182 1044 0.40      
10 A1 1132 1000 1.08      
11 A1 1046 924 0.16      
12 A1 876 774 0.07      
13 A1 576 508 0.05      
14 A2 1056 933 0.00      
15 A2 975 861 0.00      
16 A2 942 832 0.00      
17 A2 812 717 0.00      
18 A2 611 540 0.00      
19 A2 309 273 0.00      
20 B1 988 873 4.46      
21 B1 806 712 50.28      
22 B1 776 686 2.96      
23 B1 379 335 0.95      
24 B1 248 219 4.75      
25 B2 3517 3106 9.66      
26 B2 3506 3096 30.52      
27 B2 3495 3086 0.03      
28 B2 1800 1589 0.02      
29 B2 1580 1396 8.68      
30 B2 1399 1235 4.94      
31 B2 1339 1183 13.28      
32 B2 1174 1037 0.29      
33 B2 1118 987 3.20      
34 B2 941 831 0.01      
35 B2 699 617 0.07      
36 B2 448 395 1.11      

Unscaled Zero Point Vibrational Energy (zpe) 26167.0 cm-1
Scaled (by 0.8831) Zero Point Vibrational Energy (zpe) 23108.1 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 HSEh1PBE/STO-3G
ABC
0.15881 0.07228 0.04967

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.454 -0.625
C2 0.000 0.689 -1.862
C3 0.000 -0.689 -1.862
C4 0.000 -1.454 -0.625
C5 0.000 -0.676 2.065
C6 0.000 0.676 2.065
C7 0.000 0.722 0.527
C8 0.000 -0.722 0.527
H9 0.000 2.549 -0.657
H10 0.000 1.233 -2.812
H11 0.000 -1.233 -2.812
H12 0.000 -2.549 -0.657
H13 0.000 -1.456 2.839
H14 0.000 1.456 2.839

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.45402.47422.90793.43152.80101.36472.46201.09512.19783.46394.00264.52453.4645
C21.45401.37822.47424.15773.92742.38862.77412.21561.09452.14373.45455.16744.7632
C32.47421.37821.45403.92744.15772.77412.38863.45452.14371.09452.21564.76325.1674
C42.90792.47421.45402.80103.43152.46201.36474.00263.46392.19781.09513.46454.5245
C53.43154.15773.92742.80101.35142.07891.53964.22005.23744.90913.30461.09902.2679
C62.80103.92744.15773.43151.35141.53962.07893.30464.90915.23744.22002.26791.0990
C71.36472.38862.77412.46202.07891.53961.44392.17663.37733.86853.47813.17692.4264
C82.46202.77412.38861.36471.53962.07891.44393.47813.86853.37732.17662.42643.1769
H91.09512.21563.45454.00264.22003.30462.17663.47812.52484.35205.09715.31623.6631
H102.19781.09452.14373.46395.23744.90913.37733.86852.52482.46534.35206.25815.6555
H113.46392.14371.09452.19784.90915.23743.86853.37734.35202.46532.52485.65556.2581
H124.00263.45452.21561.09513.30464.22003.47812.17665.09714.35202.52483.66315.3162
H134.52455.16744.76323.46451.09902.26793.17692.42645.31626.25815.65553.66312.9122
H143.46454.76325.16744.52452.26791.09902.42643.17693.66315.65556.25815.31622.9122

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.738 C1 C2 H10 118.486
C1 C7 C6 149.287 C1 C7 N8 122.436
C2 C1 C7 115.827 C2 C1 H9 120.069
C2 C3 C4 121.738 C2 C3 H11 119.776
C3 C2 H10 119.776 C3 C4 N8 115.827
C3 C4 H12 120.069 C4 C3 H11 118.486
C4 N8 C5 149.287 C4 N8 C7 122.436
C5 C6 C7 91.722 C5 C6 H14 135.247
C5 N8 C7 88.278 C6 C5 N8 91.722
C6 C5 H13 135.247 C6 C7 N8 88.278
C7 C1 H9 124.104 C7 C6 H14 133.031
N8 C4 H12 124.104 N8 C5 H13 133.031
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.100      
2 C -0.084      
3 C -0.084      
4 C -0.100      
5 C -0.076      
6 C -0.076      
7 C -0.002      
8 C -0.002      
9 H 0.086      
10 H 0.082      
11 H 0.082      
12 H 0.086      
13 H 0.093      
14 H 0.093      


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 0.586 0.586
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -45.102 0.000 0.000
y 0.000 -39.207 0.000
z 0.000 0.000 -37.958
Traceless
 xyz
x -6.519 0.000 0.000
y 0.000 2.323 0.000
z 0.000 0.000 4.196
Polar
3z2-r28.393
x2-y2-5.895
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.358 0.000 0.000
y 0.000 8.485 0.000
z 0.000 0.000 10.510


<r2> (average value of r2) Å2
<r2> 221.432
(<r2>)1/2 14.881