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 C6H6 (1,2,4,5-Hexatetraene)

using model chemistry: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K-231.847470
Energy at 298.15K-231.851468
HF Energy-231.596027
Nuclear repulsion energy176.131470
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 B2PLYP/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3187 3025 0.00      
2 Ag 3169 3008 0.00      
3 Ag 2045 1941 0.00      
4 Ag 1535 1457 0.00      
5 Ag 1433 1361 0.00      
6 Ag 1191 1131 0.00      
7 Ag 1057 1003 0.00      
8 Ag 886 841 0.00      
9 Ag 542 514 0.00      
10 Ag 236 224 0.00      
11 Au 3241 3077 8.89      
12 Au 1040 988 0.07      
13 Au 935 888 31.90      
14 Au 493 468 3.41      
15 Au 359 340 8.18      
16 Au 84 80 0.33      
17 Bg 3241 3077 0.00      
18 Bg 1042 989 0.00      
19 Bg 902 856 0.00      
20 Bg 681 646 0.00      
21 Bg 327 311 0.00      
22 Bu 3195 3032 8.13      
23 Bu 3169 3008 22.44      
24 Bu 2065 1960 66.16      
25 Bu 1500 1424 1.17      
26 Bu 1298 1232 12.06      
27 Bu 1122 1065 2.05      
28 Bu 887 842 103.89      
29 Bu 551 523 20.88      
30 Bu 124 117 0.61      

Unscaled Zero Point Vibrational Energy (zpe) 20768.1 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 19713.1 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 B2PLYP/6-31G*
ABC
1.07327 0.04526 0.04421

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.328 0.656 0.000
C2 0.328 -0.656 0.000
C3 0.328 1.799 0.000
C4 -0.328 -1.799 0.000
C5 0.983 2.931 0.000
C6 -0.983 -2.931 0.000
H7 -1.416 0.666 0.000
H8 1.416 -0.666 0.000
H9 1.268 3.425 0.925
H10 1.268 3.425 -0.925
H11 -1.268 -3.425 0.925
H12 -1.268 -3.425 -0.925

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12
C11.46751.31742.45522.62563.64681.08802.18863.32733.32734.28954.2895
C21.46752.45521.31743.64682.62562.18861.08804.28954.28953.32733.3273
C31.31742.45523.65701.30824.90842.07962.69432.09422.09425.54045.5404
C42.45521.31743.65704.90841.30822.69432.07965.54045.54042.09422.0942
C52.62563.64681.30824.90846.18333.29953.62311.08701.08706.80656.8065
C63.64682.62564.90841.30826.18333.62313.29956.80656.80651.08701.0870
H71.08802.18862.07962.69433.29953.62313.12953.95913.95914.19724.1972
H82.18861.08802.69432.07963.62313.29953.12954.19724.19723.95913.9591
H93.32734.28952.09425.54041.08706.80653.95914.19721.85077.30507.5358
H103.32734.28952.09425.54041.08706.80653.95914.19721.85077.53587.3050
H114.28953.32735.54042.09426.80651.08704.19723.95917.30507.53581.8507
H124.28953.32735.54042.09426.80651.08704.19723.95917.53587.30501.8507

picture of 1,2,4,5-Hexatetraene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 123.585 C1 C2 H8 117.061
C1 C3 C5 179.807 C2 C1 C3 123.585
C2 C1 H7 117.061 C2 C4 C6 179.807
C3 C1 H7 119.354 C3 C5 H9 121.651
C3 C5 H10 121.651 C4 C2 H8 119.354
C4 C6 H11 121.651 C4 C6 H12 121.651
H9 C5 H10 116.698 H11 C6 H12 116.698
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.288      
2 C -0.288      
3 C 0.283      
4 C 0.283      
5 C -0.525      
6 C -0.525      
7 H 0.176      
8 H 0.176      
9 H 0.177      
10 H 0.177      
11 H 0.177      
12 H 0.177      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.359 3.048 0.000
y 3.048 -31.087 0.000
z 0.000 0.000 -35.749
Traceless
 xyz
x -0.942 3.048 0.000
y 3.048 3.968 0.000
z 0.000 0.000 -3.026
Polar
3z2-r2-6.052
x2-y2-3.273
xy3.048
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.595 6.057 0.000
y 6.057 18.933 0.000
z 0.000 0.000 4.839


<r2> (average value of r2) Å2
<r2> 244.034
(<r2>)1/2 15.622