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: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-230.803975
Energy at 298.15K-230.806995
Nuclear repulsion energy188.178124
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 B1B95/6-31G*
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 3251 3087 4.93      
2 A1 3225 3061 5.92      
3 A1 2061 1956 0.09      
4 A1 1517 1440 0.44      
5 A1 1350 1282 0.45      
6 A1 1177 1118 0.13      
7 A1 1104 1048 22.48      
8 A1 1020 968 5.69      
9 A1 616 585 0.39      
10 A2 975 925 0.00      
11 A2 880 836 0.00      
12 A2 600 570 0.00      
13 A2 447 424 0.00      
14 B1 926 879 0.09      
15 B1 760 722 66.39      
16 B1 392 372 4.39      
17 B2 3248 3083 35.37      
18 B2 3209 3046 1.27      
19 B2 1514 1437 11.13      
20 B2 1458 1384 7.09      
21 B2 1289 1224 0.06      
22 B2 1128 1070 1.58      
23 B2 837 794 27.38      
24 B2 390 370 110.29      

Unscaled Zero Point Vibrational Energy (zpe) 16686.0 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 15840.0 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 B1B95/6-31G*
ABC
0.23717 0.19102 0.10580

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.624 -1.229
C2 0.000 -0.624 -1.229
C3 0.000 1.459 -0.133
C4 0.000 -1.459 -0.133
C5 0.000 0.700 1.050
C6 0.000 -0.700 1.050
H7 0.000 2.542 -0.134
H8 0.000 -2.542 -0.134
H9 0.000 1.222 2.003
H10 0.000 -1.222 2.003

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10
C11.24721.37802.35342.28042.63582.20933.35003.28653.7213
C21.24722.35341.37802.63582.28043.35002.20933.72133.2865
C31.37802.35342.91841.40572.46271.08314.00162.14913.4277
C42.35341.37802.91842.46271.40574.00161.08313.42772.1491
C52.28042.63581.40572.46271.40102.18963.45231.08582.1452
C62.63582.28042.46271.40571.40103.45232.18962.14521.0858
H72.20933.35001.08314.00162.18963.45235.08472.51194.3281
H83.35002.20934.00161.08313.45232.18965.08474.32812.5119
H93.28653.72132.14913.42771.08582.14522.51194.32812.4432
H103.72133.28653.42772.14912.14521.08584.32812.51192.4432

picture of Benzyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 127.330 C1 C3 C5 110.004
C1 C3 H7 127.292 C2 C1 C3 127.330
C2 C4 C6 110.004 C2 C4 H8 127.292
C3 C5 C6 122.666 C3 C5 H9 118.652
C4 C6 C5 122.666 C4 C6 H10 118.652
C5 C3 H7 122.704 C5 C6 H10 118.682
C6 C4 H8 122.704 C6 C5 H9 118.682
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.008      
2 C -0.008      
3 C -0.173      
4 C -0.173      
5 C -0.162      
6 C -0.162      
7 H 0.174      
8 H 0.174      
9 H 0.169      
10 H 0.169      


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 1.512 1.512
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -36.728 0.000 0.000
y 0.000 -28.540 0.000
z 0.000 0.000 -33.360
Traceless
 xyz
x -5.778 0.000 0.000
y 0.000 6.504 0.000
z 0.000 0.000 -0.726
Polar
3z2-r2-1.452
x2-y2-8.188
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.009 0.000 0.000
y 0.000 10.997 0.000
z 0.000 0.000 8.832


<r2> (average value of r2) Å2
<r2> 112.180
(<r2>)1/2 10.591