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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-308.298328
Energy at 298.15K-308.304000
HF Energy-308.298328
Nuclear repulsion energy313.029435
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 mPW1PW91/6-31G**
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 3288 3129 10.67      
2 A1 3240 3083 12.85      
3 A1 3225 3069 11.35      
4 A1 1741 1657 3.02      
5 A1 1613 1535 0.80      
6 A1 1537 1463 2.43      
7 A1 1463 1392 10.97      
8 A1 1198 1140 0.01      
9 A1 1127 1072 0.09      
10 A1 1082 1030 0.66      
11 A1 1000 951 4.22      
12 A1 833 792 0.43      
13 A1 552 525 0.15      
14 A2 974 927 0.00      
15 A2 925 880 0.00      
16 A2 885 842 0.00      
17 A2 782 744 0.00      
18 A2 585 557 0.00      
19 A2 297 283 0.00      
20 B1 920 875 8.05      
21 B1 758 721 102.86      
22 B1 731 696 0.19      
23 B1 364 346 1.84      
24 B1 238 226 9.89      
25 B2 3257 3099 1.24      
26 B2 3234 3077 27.77      
27 B2 3212 3057 0.07      
28 B2 1691 1609 0.50      
29 B2 1478 1407 3.85      
30 B2 1318 1254 5.25      
31 B2 1267 1206 11.44      
32 B2 1111 1058 2.04      
33 B2 1060 1008 1.04      
34 B2 881 838 0.59      
35 B2 656 625 0.76      
36 B2 427 407 4.16      

Unscaled Zero Point Vibrational Energy (zpe) 24475.8 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 23288.7 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 mPW1PW91/6-31G**
ABC
0.16175 0.07358 0.05057

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.439 -0.618
C2 0.000 0.684 -1.841
C3 0.000 -0.684 -1.841
C4 0.000 -1.439 -0.618
C5 0.000 -0.673 2.038
C6 0.000 0.673 2.038
C7 0.000 0.715 0.526
C8 0.000 -0.715 0.526
H9 0.000 2.523 -0.646
H10 0.000 1.222 -2.783
H11 0.000 -1.222 -2.783
H12 0.000 -2.523 -0.646
H13 0.000 -1.441 2.800
H14 0.000 1.441 2.800

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43802.45062.87833.39302.76371.35382.43861.08472.17633.43073.96274.46933.4175
C21.43801.36802.45064.10973.87922.36762.74972.19371.08442.12573.42295.10464.7025
C32.45061.36801.43803.87924.10972.74972.36763.42292.12571.08442.19374.70255.1046
C42.87832.45061.43802.76373.39302.43861.35383.96273.43072.17631.08473.41754.4693
C53.39304.10973.87922.76371.34602.05211.51244.17385.17984.85203.25991.08192.2472
C62.76373.87924.10973.39301.34601.51242.05213.25994.85205.17984.17382.24721.0819
C71.35382.36762.74972.43862.05211.51241.42932.15533.34773.83403.44373.13332.3870
C82.43862.74972.36761.35381.51242.05211.42933.44373.83403.34772.15532.38703.1333
H91.08472.19373.42293.96274.17383.25992.15533.44372.50224.31205.04695.25273.6119
H102.17631.08442.12573.43075.17984.85203.34773.83402.50222.44364.31206.18545.5872
H113.43072.12571.08442.17634.85205.17983.83403.34774.31202.44362.50225.58726.1854
H123.96273.42292.19371.08473.25994.17383.44372.15535.04694.31202.50223.61195.2527
H134.46935.10464.70253.41751.08192.24723.13332.38705.25276.18545.58723.61192.8821
H143.41754.70255.10464.46932.24721.08192.38703.13333.61195.58726.18545.25272.8821

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.677 C1 C2 H10 118.592
C1 C7 C6 149.224 C1 C7 N8 122.354
C2 C1 C7 115.968 C2 C1 H9 120.175
C2 C3 C4 121.677 C2 C3 H11 119.730
C3 C2 H10 119.730 C3 C4 N8 115.968
C3 C4 H12 120.175 C4 C3 H11 118.592
C4 N8 C5 149.224 C4 N8 C7 122.354
C5 C6 C7 91.578 C5 C6 H14 135.224
C5 N8 C7 88.422 C6 C5 N8 91.578
C6 C5 H13 135.224 C6 C7 N8 88.422
C7 C1 H9 123.856 C7 C6 H14 133.197
N8 C4 H12 123.856 N8 C5 H13 133.197
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.207      
2 C -0.134      
3 C -0.134      
4 C -0.207      
5 C -0.131      
6 C -0.131      
7 C 0.078      
8 C 0.078      
9 H 0.129      
10 H 0.124      
11 H 0.124      
12 H 0.129      
13 H 0.141      
14 H 0.141      


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 0.707 0.707
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.601 0.000 0.000
y 0.000 -39.998 0.000
z 0.000 0.000 -39.212
Traceless
 xyz
x -9.996 0.000 0.000
y 0.000 4.409 0.000
z 0.000 0.000 5.587
Polar
3z2-r211.175
x2-y2-9.603
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.111 0.000 0.000
y 0.000 12.934 0.000
z 0.000 0.000 15.631


<r2> (average value of r2) Å2
<r2> 219.282
(<r2>)1/2 14.808