return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-31G
 hartrees
Energy at 0K-307.940789
Energy at 298.15K-307.946571
HF Energy-307.940789
Nuclear repulsion energy311.780987
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/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 3322 3178 13.77      
2 A1 3255 3113 12.52      
3 A1 3236 3095 16.42      
4 A1 1746 1670 1.82      
5 A1 1592 1523 0.87      
6 A1 1543 1476 1.37      
7 A1 1473 1409 14.69      
8 A1 1230 1177 0.00      
9 A1 1127 1078 0.03      
10 A1 1093 1046 1.13      
11 A1 1009 965 3.29      
12 A1 832 796 0.12      
13 A1 562 538 0.05      
14 A2 1011 967 0.00      
15 A2 949 908 0.00      
16 A2 912 873 0.00      
17 A2 788 754 0.00      
18 A2 595 569 0.00      
19 A2 305 292 0.00      
20 B1 955 914 10.92      
21 B1 781 747 136.82      
22 B1 746 713 3.43      
23 B1 380 364 3.44      
24 B1 240 230 12.48      
25 B2 3286 3144 0.73      
26 B2 3247 3106 31.55      
27 B2 3220 3080 0.40      
28 B2 1696 1622 0.33      
29 B2 1494 1430 5.57      
30 B2 1340 1282 2.18      
31 B2 1281 1226 13.48      
32 B2 1129 1080 1.80      
33 B2 1082 1035 1.15      
34 B2 888 850 0.33      
35 B2 674 645 0.58      
36 B2 425 407 4.52      

Unscaled Zero Point Vibrational Energy (zpe) 24722.4 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 23649.4 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/6-31G
ABC
0.16066 0.07288 0.05014

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.444 -0.622
C2 0.000 0.687 -1.849
C3 0.000 -0.687 -1.849
C4 0.000 -1.444 -0.622
C5 0.000 -0.678 2.050
C6 0.000 0.678 2.050
C7 0.000 0.719 0.527
C8 0.000 -0.719 0.527
H9 0.000 2.528 -0.652
H10 0.000 1.226 -2.791
H11 0.000 -1.226 -2.791
H12 0.000 -2.528 -0.652
H13 0.000 -1.445 2.810
H14 0.000 1.445 2.810

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.44232.45932.88763.41142.77901.35782.44891.08452.18023.44003.97174.48593.4321
C21.44231.37412.45934.13123.89922.37632.76102.19581.08482.13213.43055.12444.7211
C32.45931.37411.44233.89924.13122.76102.37633.43052.13211.08482.19584.72115.1244
C42.88762.45931.44232.77903.41142.44891.35783.97173.44002.18021.08453.43214.4859
C53.41144.13123.89922.77901.35572.06681.52374.19265.20164.87173.27471.08022.2548
C62.77903.89924.13123.41141.35571.52372.06683.27474.87175.20164.19262.25481.0802
C71.35782.37632.76102.44892.06681.52371.43832.15903.35613.84583.45443.14622.3963
C82.44892.76102.37631.35781.52372.06681.43833.45443.84583.35612.15902.39633.1462
H91.08452.19583.43053.97174.19263.27472.15903.45442.50384.32025.05575.27003.6282
H102.18021.08482.13213.44005.20164.87173.35613.84582.50382.45184.32026.20555.6057
H113.44002.13211.08482.18024.87175.20163.84583.35614.32022.45182.50385.60576.2055
H123.97173.43052.19581.08453.27474.19263.45442.15905.05574.32022.50383.62825.2700
H134.48595.12444.72113.43211.08022.25483.14622.39635.27006.20555.60573.62822.8895
H143.43214.72115.12444.48592.25481.08022.39633.14623.62825.60576.20555.27002.8895

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.648 C1 C2 H10 118.569
C1 C7 C6 149.301 C1 C7 N8 122.254
C2 C1 C7 116.098 C2 C1 H9 120.026
C2 C3 C4 121.648 C2 C3 H11 119.783
C3 C2 H10 119.783 C3 C4 N8 116.098
C3 C4 H12 120.026 C4 C3 H11 118.569
C4 N8 C5 149.301 C4 N8 C7 122.254
C5 C6 C7 91.554 C5 C6 H14 135.234
C5 N8 C7 88.446 C6 C5 N8 91.554
C6 C5 H13 135.234 C6 C7 N8 88.446
C7 C1 H9 123.876 C7 C6 H14 133.212
N8 C4 H12 123.876 N8 C5 H13 133.212
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.185      
2 C -0.175      
3 C -0.175      
4 C -0.185      
5 C -0.098      
6 C -0.098      
7 C -0.066      
8 C -0.066      
9 H 0.172      
10 H 0.159      
11 H 0.159      
12 H 0.172      
13 H 0.193      
14 H 0.193      


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 0.572 0.572
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.321 0.000 0.000
y 0.000 -40.348 0.000
z 0.000 0.000 -39.504
Traceless
 xyz
x -10.395 0.000 0.000
y 0.000 4.565 0.000
z 0.000 0.000 5.830
Polar
3z2-r211.660
x2-y2-9.973
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.687 0.000 0.000
y 0.000 12.796 0.000
z 0.000 0.000 15.285


<r2> (average value of r2) Å2
<r2> 221.157
(<r2>)1/2 14.871