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All results from a given calculation for C8H6 (benzocyclobutadiene)

using model chemistry: BLYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at BLYP/3-21G
 hartrees
Energy at 0K-306.516692
Energy at 298.15K-306.522146
HF Energy-306.516692
Nuclear repulsion energy308.332361
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 BLYP/3-21G
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 3203 3185 14.23      
2 A1 3137 3120 12.53      
3 A1 3120 3103 13.24      
4 A1 1625 1616 2.04      
5 A1 1481 1473 1.55      
6 A1 1426 1419 0.63      
7 A1 1396 1388 11.71      
8 A1 1202 1196 0.01      
9 A1 1057 1051 0.30      
10 A1 1034 1028 0.00      
11 A1 932 927 1.97      
12 A1 771 767 0.12      
13 A1 536 533 0.06      
14 A2 953 948 0.00      
15 A2 893 888 0.00      
16 A2 859 854 0.00      
17 A2 763 759 0.00      
18 A2 577 574 0.00      
19 A2 295 294 0.00      
20 B1 898 893 8.55      
21 B1 731 727 111.64      
22 B1 701 698 4.31      
23 B1 363 361 2.87      
24 B1 217 216 12.33      
25 B2 3170 3152 1.31      
26 B2 3130 3113 28.81      
27 B2 3106 3089 0.31      
28 B2 1576 1567 0.00      
29 B2 1438 1430 5.79      
30 B2 1303 1295 0.12      
31 B2 1225 1219 12.80      
32 B2 1067 1061 1.96      
33 B2 1033 1027 1.60      
34 B2 836 831 0.01      
35 B2 655 652 0.40      
36 B2 386 384 4.12      

Unscaled Zero Point Vibrational Energy (zpe) 23546.4 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 23416.9 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 BLYP/3-21G
ABC
0.15793 0.07092 0.04894

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.456 -0.629
C2 0.000 0.693 -1.870
C3 0.000 -0.693 -1.870
C4 0.000 -1.456 -0.629
C5 0.000 -0.686 2.076
C6 0.000 0.686 2.076
C7 0.000 0.730 0.529
C8 0.000 -0.730 0.529
H9 0.000 2.548 -0.661
H10 0.000 1.236 -2.817
H11 0.000 -1.236 -2.817
H12 0.000 -2.548 -0.661
H13 0.000 -1.458 2.838
H14 0.000 1.458 2.838

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14
C11.45732.48162.91283.45112.81321.36732.47471.09162.19923.46994.00414.52993.4676
C21.45731.38512.48164.18053.94672.40002.78982.21451.09222.14903.45855.17674.7705
C32.48161.38511.45733.94674.18052.78982.40003.45852.14901.09222.21454.77055.1767
C42.91282.48161.45732.81323.45112.47471.36734.00413.46992.19921.09163.46764.5299
C53.45114.18053.94672.81321.37182.09741.54764.23655.25784.92473.31031.08502.2756
C62.81323.94674.18053.45111.37181.54762.09743.31034.92475.25784.23652.27561.0850
C71.36732.40002.78982.47472.09741.54761.46072.17233.38493.88193.48733.18142.4210
C82.47472.78982.40001.36731.54762.09741.46073.48733.88193.38492.17232.42103.1814
H91.09162.21453.45854.00414.23653.31032.17233.48732.52384.35545.09515.31903.6648
H102.19921.09222.14903.46995.25784.92473.38493.88192.52382.47304.35546.26505.6601
H113.46992.14901.09222.19924.92475.25783.88193.38494.35542.47302.52385.66016.2650
H124.00413.45852.21451.09163.31034.23653.48732.17235.09514.35542.52383.66485.3190
H134.52995.17674.77053.46761.08502.27563.18142.42105.31906.26505.66013.66482.9166
H143.46764.77055.17674.52992.27561.08502.42103.18143.66485.66016.26505.31902.9166

picture of benzocyclobutadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 121.611 C1 C2 H10 118.520
C1 C7 C6 149.570 C1 C7 N8 122.075
C2 C1 C7 116.314 C2 C1 H9 119.952
C2 C3 C4 121.611 C2 C3 H11 119.869
C3 C2 H10 119.869 C3 C4 N8 116.314
C3 C4 H12 119.952 C4 C3 H11 118.520
C4 N8 C5 149.570 C4 N8 C7 122.075
C5 C6 C7 91.645 C5 C6 H14 135.387
C5 N8 C7 88.355 C6 C5 N8 91.645
C6 C5 H13 135.387 C6 C7 N8 88.355
C7 C1 H9 123.734 C7 C6 H14 132.968
N8 C4 H12 123.734 N8 C5 H13 132.968
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.268      
2 C -0.156      
3 C -0.156      
4 C -0.268      
5 C -0.132      
6 C -0.132      
7 C 0.074      
8 C 0.074      
9 H 0.160      
10 H 0.163      
11 H 0.163      
12 H 0.160      
13 H 0.160      
14 H 0.160      


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 0.532 0.532
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.291 0.000 0.000
y 0.000 -40.761 0.000
z 0.000 0.000 -39.510
Traceless
 xyz
x -11.156 0.000 0.000
y 0.000 4.640 0.000
z 0.000 0.000 6.516
Polar
3z2-r213.032
x2-y2-10.530
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.057 0.000 0.000
y 0.000 12.597 0.000
z 0.000 0.000 15.566


<r2> (average value of r2) Å2
<r2> 226.063
(<r2>)1/2 15.035