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: HF/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/TZVP
 hartrees
Energy at 0K-229.457185
Energy at 298.15K-229.460386
HF Energy-229.457185
Nuclear repulsion energy189.515281
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 HF/TZVP
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 3376 3067 6.40      
2 A1 3339 3034 9.56      
3 A1 2198 1997 1.06      
4 A1 1592 1446 0.01      
5 A1 1383 1256 0.96      
6 A1 1233 1120 1.45      
7 A1 1070 972 22.50      
8 A1 1063 966 16.31      
9 A1 671 610 0.77      
10 A2 1070 972 0.00      
11 A2 962 874 0.00      
12 A2 602 547 0.00      
13 A2 449 408 0.00      
14 B1 1045 950 0.02      
15 B1 831 755 94.80      
16 B1 430 391 8.74      
17 B2 3373 3064 24.50      
18 B2 3322 3018 3.84      
19 B2 1625 1476 24.10      
20 B2 1529 1389 2.07      
21 B2 1357 1233 0.01      
22 B2 1200 1090 1.36      
23 B2 900 818 36.37      
24 B2 336 305 194.01      

Unscaled Zero Point Vibrational Energy (zpe) 17476.0 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 15878.7 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 HF/TZVP
ABC
0.24002 0.19376 0.10721

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.608 -1.223
C2 0.000 -0.608 -1.223
C3 0.000 1.450 -0.129
C4 0.000 -1.450 -0.129
C5 0.000 0.704 1.043
C6 0.000 -0.704 1.043
H7 0.000 2.521 -0.137
H8 0.000 -2.521 -0.137
H9 0.000 1.217 1.988
H10 0.000 -1.217 1.988

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10
C11.21671.38042.33092.26812.61872.19963.31253.26833.6936
C21.21672.33091.38042.61872.26813.31252.19963.69363.2683
C31.38042.33092.89911.38862.45161.07153.97062.12933.4045
C42.33091.38042.89912.45161.38863.97061.07153.40452.1293
C52.26812.61871.38862.45161.40812.16663.43421.07532.1409
C62.61872.26812.45161.38861.40813.43422.16662.14091.0753
H72.19963.31251.07153.97062.16663.43425.04212.49334.2999
H83.31252.19963.97061.07153.43422.16665.04214.29992.4933
H93.26833.69362.12933.40451.07532.14092.49334.29992.4339
H103.69363.26833.40452.12932.14091.07534.29992.49332.4339

picture of Benzyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 127.545 C1 C3 C5 109.984
C1 C3 H7 127.093 C2 C1 C3 127.545
C2 C4 C6 109.984 C2 C4 H8 127.093
C3 C5 C6 122.471 C3 C5 H9 119.038
C4 C6 C5 122.471 C4 C6 H10 119.038
C5 C3 H7 122.923 C5 C6 H10 118.491
C6 C4 H8 122.923 C6 C5 H9 118.491
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.026      
2 C -0.026      
3 C -0.107      
4 C -0.107      
5 C -0.123      
6 C -0.123      
7 H 0.133      
8 H 0.133      
9 H 0.124      
10 H 0.124      


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 1.869 1.869
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.762 0.000 0.000
y 0.000 -29.110 0.000
z 0.000 0.000 -35.766
Traceless
 xyz
x -6.324 0.000 0.000
y 0.000 8.154 0.000
z 0.000 0.000 -1.829
Polar
3z2-r2-3.659
x2-y2-9.652
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.150 0.000 0.000
y 0.000 11.675 0.000
z 0.000 0.000 9.570


<r2> (average value of r2) Å2
<r2> 112.000
(<r2>)1/2 10.583