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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: B1B95/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-308.148817
Energy at 298.15K-308.154583
HF Energy-308.148817
Nuclear repulsion energy312.361142
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 B1B95/6-31G
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 3326 3172 14.29      
2 A1 3260 3109 12.34      
3 A1 3241 3091 17.22      
4 A1 1750 1669 1.63      
5 A1 1600 1526 0.89      
6 A1 1543 1471 1.55      
7 A1 1475 1407 13.96      
8 A1 1230 1173 0.00      
9 A1 1128 1076 0.01      
10 A1 1095 1044 0.92      
11 A1 1009 963 3.26      
12 A1 832 793 0.16      
13 A1 557 532 0.04      
14 A2 1014 967 0.00      
15 A2 953 909 0.00      
16 A2 915 873 0.00      
17 A2 783 747 0.00      
18 A2 592 564 0.00      
19 A2 303 289 0.00      
20 B1 958 914 10.24      
21 B1 782 746 132.32      
22 B1 748 713 2.40      
23 B1 378 361 3.46      
24 B1 240 229 11.99      
25 B2 3290 3138 0.88      
26 B2 3253 3102 32.01      
27 B2 3226 3076 0.46      
28 B2 1701 1622 0.36      
29 B2 1495 1426 5.25      
30 B2 1340 1278 2.22      
31 B2 1282 1223 13.00      
32 B2 1127 1075 1.62      
33 B2 1079 1029 1.31      
34 B2 885 844 0.34      
35 B2 667 636 0.61      
36 B2 420 401 4.36      

Unscaled Zero Point Vibrational Energy (zpe) 24737.3 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 23591.9 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 B1B95/6-31G
ABC
0.16116 0.07318 0.05033

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.442 -0.620
C2 0.000 0.686 -1.845
C3 0.000 -0.686 -1.845
C4 0.000 -1.442 -0.620
C5 0.000 -0.676 2.046
C6 0.000 0.676 2.046
C7 0.000 0.718 0.525
C8 0.000 -0.718 0.525
H9 0.000 2.524 -0.651
H10 0.000 1.223 -2.785
H11 0.000 -1.223 -2.785
H12 0.000 -2.524 -0.651
H13 0.000 -1.442 2.805
H14 0.000 1.442 2.805

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43922.45462.88383.40482.77371.35472.44441.08242.17553.43303.96584.47723.4250
C21.43921.37112.45464.12173.89032.36962.75382.19201.08272.12733.42425.11304.7105
C32.45461.37111.43923.89034.12172.75382.36963.42422.12731.08272.19204.71055.1130
C42.88382.45461.43922.77373.40482.44441.35473.96583.43302.17551.08243.42504.4772
C53.40484.12173.89032.77371.35212.06301.52144.18455.19014.86113.26871.07822.2497
C62.77373.89034.12173.40481.35211.52142.06303.26874.86115.19014.18452.24971.0782
C71.35472.36962.75382.44442.06301.52141.43562.15493.34773.83643.44823.14032.3922
C82.44442.75382.36961.35471.52142.06301.43563.44823.83643.34772.15492.39223.1403
H91.08242.19203.42423.96584.18453.26872.15493.44822.49924.31175.04765.25983.6210
H102.17551.08272.12733.43305.19014.86113.34773.83642.49922.44564.31176.19205.5937
H113.43302.12731.08272.17554.86115.19013.83643.34774.31172.44562.49925.59376.1920
H123.96583.42422.19201.08243.26874.18453.44822.15495.04764.31172.49923.62105.2598
H134.47725.11304.71053.42501.07822.24973.14032.39225.25986.19205.59373.62102.8833
H143.42504.71055.11304.47722.24971.07822.39223.14033.62105.59376.19205.25982.8833

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 118.545
C1 C7 C6 149.262 C1 C7 N8 122.310
C2 C1 C7 115.986 C2 C1 H9 120.087
C2 C3 C4 121.704 C2 C3 H11 119.751
C3 C2 H10 119.751 C3 C4 N8 115.986
C3 C4 H12 120.087 C4 C3 H11 118.545
C4 N8 C5 149.262 C4 N8 C7 122.310
C5 C6 C7 91.572 C5 C6 H14 135.242
C5 N8 C7 88.428 C6 C5 N8 91.572
C6 C5 H13 135.242 C6 C7 N8 88.428
C7 C1 H9 123.927 C7 C6 H14 133.186
N8 C4 H12 123.927 N8 C5 H13 133.186
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.169      
2 C -0.169      
3 C -0.169      
4 C -0.169      
5 C -0.086      
6 C -0.086      
7 C -0.074      
8 C -0.074      
9 H 0.163      
10 H 0.151      
11 H 0.151      
12 H 0.163      
13 H 0.184      
14 H 0.184      


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 0.562 0.562
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.084 0.000 0.000
y 0.000 -40.335 0.000
z 0.000 0.000 -39.530
Traceless
 xyz
x -10.151 0.000 0.000
y 0.000 4.472 0.000
z 0.000 0.000 5.680
Polar
3z2-r211.359
x2-y2-9.749
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.671 0.000 0.000
y 0.000 12.735 0.000
z 0.000 0.000 15.162


<r2> (average value of r2) Å2
<r2> 220.379
(<r2>)1/2 14.845