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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: LSDA/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 LSDA/6-311G*
 hartrees
Energy at 0K-306.638800
Energy at 298.15K-306.644229
HF Energy-306.638800
Nuclear repulsion energy313.840127
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 LSDA/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 3160 3108 7.36      
2 A1 3124 3073 11.29      
3 A1 3107 3057 5.59      
4 A1 1701 1673 3.59      
5 A1 1555 1530 0.50      
6 A1 1520 1495 1.12      
7 A1 1414 1391 11.90      
8 A1 1154 1135 0.02      
9 A1 1101 1083 0.08      
10 A1 1024 1007 3.66      
11 A1 990 973 4.49      
12 A1 816 802 0.16      
13 A1 541 532 0.14      
14 A2 915 900 0.00      
15 A2 866 852 0.00      
16 A2 834 820 0.00      
17 A2 764 752 0.00      
18 A2 568 559 0.00      
19 A2 284 280 0.00      
20 B1 868 853 9.59      
21 B1 711 699 125.64      
22 B1 679 668 1.97      
23 B1 348 342 2.80      
24 B1 221 217 14.95      
25 B2 3129 3078 1.44      
26 B2 3114 3063 21.96      
27 B2 3098 3048 0.28      
28 B2 1643 1617 0.14      
29 B2 1428 1405 4.46      
30 B2 1262 1242 7.19      
31 B2 1209 1189 16.02      
32 B2 1081 1064 2.02      
33 B2 1032 1015 0.40      
34 B2 856 842 0.58      
35 B2 642 631 1.10      
36 B2 414 407 4.52      

Unscaled Zero Point Vibrational Energy (zpe) 23585.0 cm-1
Scaled (by 0.9837) Zero Point Vibrational Energy (zpe) 23200.5 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 LSDA/6-311G*
ABC
0.16272 0.07407 0.05090

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.433 -0.616
C2 0.000 0.682 -1.832
C3 0.000 -0.682 -1.832
C4 0.000 -1.433 -0.616
C5 0.000 -0.673 2.028
C6 0.000 0.673 2.028
C7 0.000 0.713 0.526
C8 0.000 -0.713 0.526
H9 0.000 2.528 -0.647
H10 0.000 1.225 -2.783
H11 0.000 -1.225 -2.783
H12 0.000 -2.528 -0.647
H13 0.000 -1.450 2.796
H14 0.000 1.450 2.796

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.42942.43982.86623.38122.75171.35042.43111.09492.17653.42913.96084.46733.4123
C21.42941.36412.43984.09203.86092.35872.74022.19321.09452.13073.42145.09594.6917
C32.43981.36411.42943.86094.09202.74022.35873.42142.13071.09452.19324.69175.0959
C42.86622.43981.42942.75173.38122.43111.35043.96083.42912.17651.09493.41234.4673
C53.38124.09203.86092.75171.34692.04431.50294.17215.17234.84283.25541.09202.2581
C62.75173.86094.09203.38121.34691.50292.04433.25544.84285.17234.17212.25811.0920
C71.35042.35872.74022.43112.04431.50291.42582.16103.34833.83463.44643.13552.3866
C82.43112.74022.35871.35041.50292.04431.42583.44643.83463.34832.16102.38663.1355
H91.09492.19323.42143.96084.17213.25542.16103.44642.50144.31765.05515.26113.6078
H102.17651.09452.13073.42915.17234.84283.34833.83462.50142.44994.31766.18705.5833
H113.42912.13071.09452.17654.84285.17233.83463.34834.31762.44992.50145.58336.1870
H123.96083.42142.19321.09493.25544.17213.44642.16105.05514.31762.50143.60785.2611
H134.46735.09594.69173.41231.09202.25813.13552.38665.26116.18705.58333.60782.9005
H143.41234.69175.09594.46732.25811.09202.38663.13553.60785.58336.18705.26112.9005

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.699 C1 C2 H10 118.563
C1 C7 C6 149.276 C1 C7 N8 122.229
C2 C1 C7 116.072 C2 C1 H9 120.074
C2 C3 C4 121.699 C2 C3 H11 119.738
C3 C2 H10 119.738 C3 C4 N8 116.072
C3 C4 H12 120.074 C4 C3 H11 118.563
C4 N8 C5 149.276 C4 N8 C7 122.229
C5 C6 C7 91.505 C5 C6 H14 135.349
C5 N8 C7 88.495 C6 C5 N8 91.505
C6 C5 H13 135.349 C6 C7 N8 88.495
C7 C1 H9 123.854 C7 C6 H14 133.146
N8 C4 H12 123.854 N8 C5 H13 133.146
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.232      
2 C -0.230      
3 C -0.230      
4 C -0.232      
5 C -0.224      
6 C -0.224      
7 C 0.035      
8 C 0.035      
9 H 0.217      
10 H 0.215      
11 H 0.215      
12 H 0.217      
13 H 0.219      
14 H 0.219      


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 0.625 0.625
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.151 0.000 0.000
y 0.000 -40.550 0.000
z 0.000 0.000 -39.744
Traceless
 xyz
x -11.004 0.000 0.000
y 0.000 4.897 0.000
z 0.000 0.000 6.107
Polar
3z2-r212.214
x2-y2-10.601
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.164 0.000 0.000
y 0.000 13.531 0.000
z 0.000 0.000 16.778


<r2> (average value of r2) Å2
<r2> 218.807
(<r2>)1/2 14.792