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 C6H4 (Benzyne)

using model chemistry: B3LYP/CEP-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 B3LYP/CEP-31G
 hartrees
Energy at 0K-36.090143
Energy at 298.15K-36.093164
Nuclear repulsion energy89.599185
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 B3LYP/CEP-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 3227 3125 12.88      
2 A1 3189 3088 10.95      
3 A1 1989 1927 0.01      
4 A1 1472 1425 0.15      
5 A1 1321 1280 0.93      
6 A1 1167 1130 0.65      
7 A1 1066 1032 32.46      
8 A1 990 959 5.89      
9 A1 608 589 0.11      
10 A2 993 962 0.00      
11 A2 897 869 0.00      
12 A2 587 568 0.00      
13 A2 425 412 0.00      
14 B1 956 926 0.01      
15 B1 782 758 140.35      
16 B1 392 380 8.17      
17 B2 3221 3119 36.29      
18 B2 3157 3057 3.21      
19 B2 1459 1413 16.09      
20 B2 1405 1361 6.55      
21 B2 1263 1224 0.12      
22 B2 1104 1069 3.18      
23 B2 825 799 31.29      
24 B2 416 403 93.98      

Unscaled Zero Point Vibrational Energy (zpe) 16456.4 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 15936.3 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 B3LYP/CEP-31G
ABC
0.22401 0.18235 0.10052

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.644 -1.266
C2 0.000 -0.644 -1.266
C3 0.000 1.493 -0.133
C4 0.000 -1.493 -0.133
C5 0.000 0.718 1.082
C6 0.000 -0.718 1.082
H7 0.000 2.584 -0.138
H8 0.000 -2.584 -0.138
H9 0.000 1.248 2.040
H10 0.000 -1.248 2.040

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10
C11.28791.41692.41962.34962.71482.24383.41893.36133.8096
C21.28792.41961.41692.71482.34963.41892.24383.80963.3613
C31.41692.41962.98691.44102.52301.09014.07702.18653.4981
C42.41961.41692.98692.52301.44104.07701.09013.49812.1865
C52.34962.71481.44102.52301.43592.22933.51981.09502.1871
C62.71482.34962.52301.44101.43593.51982.22932.18711.0950
H72.24383.41891.09014.07702.22933.51985.16702.55524.4076
H83.41892.24384.07701.09013.51982.22935.16704.40762.5552
H93.36133.80962.18653.49811.09502.18712.55524.40762.4962
H103.80963.36133.49812.18652.18711.09504.40762.55522.4962

picture of Benzyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 126.840 C1 C3 C5 110.602
C1 C3 H7 126.531 C2 C1 C3 126.840
C2 C4 C6 110.602 C2 C4 H8 126.531
C3 C5 C6 122.559 C3 C5 H9 118.485
C4 C6 C5 122.559 C4 C6 H10 118.485
C5 C3 H7 122.868 C5 C6 H10 118.956
C6 C4 H8 122.868 C6 C5 H9 118.956
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.010      
2 C 0.010      
3 C -0.328      
4 C -0.328      
5 C -0.233      
6 C -0.233      
7 H 0.292      
8 H 0.292      
9 H 0.258      
10 H 0.258      


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 2.233 2.233
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.035 0.000 0.000
y 0.000 -28.690 0.000
z 0.000 0.000 -35.264
Traceless
 xyz
x -6.058 0.000 0.000
y 0.000 7.960 0.000
z 0.000 0.000 -1.902
Polar
3z2-r2-3.804
x2-y2-9.345
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.382 0.000 0.000
y 0.000 11.658 0.000
z 0.000 0.000 9.575


<r2> (average value of r2) Å2
<r2> 93.683
(<r2>)1/2 9.679