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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-308.288942
Energy at 298.15K-308.294590
HF Energy-308.288942
Nuclear repulsion energy312.988018
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 3292 3122 12.73      
2 A1 3243 3076 14.59      
3 A1 3228 3061 12.47      
4 A1 1743 1653 3.05      
5 A1 1615 1531 0.81      
6 A1 1539 1459 2.30      
7 A1 1469 1393 10.96      
8 A1 1204 1142 0.01      
9 A1 1129 1070 0.07      
10 A1 1085 1029 0.72      
11 A1 1002 950 4.10      
12 A1 833 790 0.41      
13 A1 553 524 0.13      
14 A2 971 921 0.00      
15 A2 920 873 0.00      
16 A2 884 838 0.00      
17 A2 784 744 0.00      
18 A2 585 555 0.00      
19 A2 298 282 0.00      
20 B1 917 870 8.37      
21 B1 758 719 106.05      
22 B1 730 693 0.54      
23 B1 365 346 1.83      
24 B1 238 226 10.09      
25 B2 3262 3093 2.09      
26 B2 3237 3069 31.91      
27 B2 3215 3049 0.10      
28 B2 1692 1605 0.46      
29 B2 1485 1408 3.86      
30 B2 1325 1256 4.40      
31 B2 1271 1205 12.00      
32 B2 1115 1057 1.81      
33 B2 1061 1006 1.13      
34 B2 882 836 0.53      
35 B2 657 623 0.77      
36 B2 428 406 4.16      

Unscaled Zero Point Vibrational Energy (zpe) 24506.2 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 23239.3 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
0.16174 0.07355 0.05056

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 -1.842
C3 0.000 -0.684 -1.842
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 2.524 -0.647
H10 0.000 1.223 -2.784
H11 0.000 -1.223 -2.784
H12 0.000 -2.524 -0.647
H13 0.000 -1.442 2.800
H14 0.000 1.442 2.800

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.43812.45072.87803.39312.76401.35392.43871.08532.17683.43163.96304.47013.4181
C21.43811.36822.45074.11023.87982.36812.75032.19391.08502.12673.42345.10584.7036
C32.45071.36821.43813.87984.11022.75032.36813.42342.12671.08502.19394.70365.1058
C42.87802.45071.43812.76403.39312.43871.35393.96303.43162.17681.08533.41814.4701
C53.39314.11023.87982.76401.34582.05211.51244.17455.18094.85293.26091.08272.2479
C62.76403.87984.11023.39311.34581.51242.05213.26094.85295.18094.17452.24791.0827
C71.35392.36812.75032.43872.05211.51241.42952.15603.34863.83513.44453.13412.3876
C82.43872.75032.36811.35391.51242.05211.42953.44453.83513.34862.15602.38763.1341
H91.08532.19393.42343.96304.17453.26092.15603.44452.50214.31325.04785.25433.6129
H102.17681.08502.12673.43165.18094.85293.34863.83512.50212.44524.31326.18715.5884
H113.43162.12671.08502.17684.85295.18093.83513.34864.31322.44522.50215.58846.1871
H123.96303.42342.19391.08533.26094.17453.44452.15605.04784.31322.50213.61295.2543
H134.47015.10584.70363.41811.08272.24793.13412.38765.25436.18715.58843.61292.8834
H143.41814.70365.10584.47012.24791.08272.38763.13413.61295.58846.18715.25432.8834

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.663 C1 C2 H10 118.581
C1 C7 C6 149.243 C1 C7 N8 122.341
C2 C1 C7 115.996 C2 C1 H9 120.137
C2 C3 C4 121.663 C2 C3 H11 119.757
C3 C2 H10 119.757 C3 C4 N8 115.996
C3 C4 H12 120.137 C4 C3 H11 118.581
C4 N8 C5 149.243 C4 N8 C7 122.341
C5 C6 C7 91.585 C5 C6 H14 135.237
C5 N8 C7 88.415 C6 C5 N8 91.585
C6 C5 H13 135.237 C6 C7 N8 88.415
C7 C1 H9 123.868 C7 C6 H14 133.178
N8 C4 H12 123.868 N8 C5 H13 133.178
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 -0.270      
2 C -0.176      
3 C -0.176      
4 C -0.270      
5 C -0.184      
6 C -0.184      
7 C 0.110      
8 C 0.110      
9 H 0.171      
10 H 0.166      
11 H 0.166      
12 H 0.171      
13 H 0.182      
14 H 0.182      


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 0.696 0.696
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.672 0.000 0.000
y 0.000 -39.935 0.000
z 0.000 0.000 -39.148
Traceless
 xyz
x -10.130 0.000 0.000
y 0.000 4.475 0.000
z 0.000 0.000 5.656
Polar
3z2-r211.311
x2-y2-9.737
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.048 0.000 0.000
y 0.000 12.842 0.000
z 0.000 0.000 15.543


<r2> (average value of r2) Å2
<r2> 219.327
(<r2>)1/2 14.810