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 C6H6O (2,5-Cyclohexadienone)

using model chemistry: B2PLYP/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP/6-31+G**
 hartrees
Energy at 0K-307.146804
Energy at 298.15K-307.153329
HF Energy-306.821295
Nuclear repulsion energy268.294902
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/6-31+G**
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 3240 3086 0.09      
2 A1 3204 3052 7.63      
3 A1 3039 2894 8.44      
4 A1 1727 1645 227.21      
5 A1 1681 1601 80.70      
6 A1 1458 1388 19.98      
7 A1 1429 1361 1.59      
8 A1 1204 1147 8.23      
9 A1 970 924 5.60      
10 A1 894 851 9.75      
11 A1 781 744 2.16      
12 A1 506 481 2.82      
13 A2 1206 1149 0.00      
14 A2 998 950 0.00      
15 A2 746 711 0.00      
16 A2 353 337 0.00      
17 B1 3059 2914 4.46      
18 B1 1010 962 3.65      
19 B1 951 905 23.80      
20 B1 819 780 45.97      
21 B1 567 540 21.59      
22 B1 282 269 2.93      
23 B1 117 111 1.02      
24 B2 3239 3085 14.34      
25 B2 3204 3051 14.38      
26 B2 1663 1584 2.51      
27 B2 1439 1371 34.19      
28 B2 1397 1331 1.47      
29 B2 1294 1232 28.45      
30 B2 1154 1099 8.66      
31 B2 1004 957 6.16      
32 B2 580 552 1.37      
33 B2 453 431 14.04      

Unscaled Zero Point Vibrational Energy (zpe) 22832.6 cm-1
Scaled (by 0.9524) Zero Point Vibrational Energy (zpe) 21745.7 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 B2PLYP/6-31+G**
ABC
0.17451 0.08863 0.05941

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.109
C2 0.000 0.000 -1.825
C3 0.000 1.257 0.333
C4 0.000 -1.257 0.333
C5 0.000 1.257 -1.013
C6 0.000 -1.257 -1.013
O7 0.000 0.000 2.345
H8 0.000 2.176 0.907
H9 0.000 -2.176 0.907
H10 0.000 2.197 -1.557
H11 0.000 -2.197 -1.557
H12 0.868 0.000 -2.499
H13 -0.868 0.000 -2.499

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C12.93441.47701.47702.46622.46621.23572.18542.18543.45423.45423.71133.7113
C22.93442.49772.49771.49651.49654.17013.49323.49322.21312.21311.09901.0990
C31.47702.49772.51351.34612.85122.37191.08393.48052.11063.93673.21803.2180
C41.47702.49772.51352.85121.34612.37193.48051.08393.93672.11063.21803.2180
C52.46621.49651.34612.85122.51343.58522.12903.93331.08593.49602.13122.1312
C62.46621.49652.85121.34612.51343.58523.93332.12903.49601.08592.13122.1312
O71.23574.17012.37192.37193.58523.58522.60802.60804.47734.47734.92124.9212
H82.18543.49321.08393.48052.12903.93332.60804.35212.46405.01924.13444.1344
H92.18543.49323.48051.08393.93332.12902.60804.35215.01922.46404.13444.1344
H103.45422.21312.11063.93671.08593.49604.47732.46405.01924.39342.54322.5432
H113.45422.21313.93672.11063.49601.08594.47735.01922.46404.39342.54322.5432
H123.71131.09903.21803.21802.13122.13124.92124.13444.13442.54322.54321.7362
H133.71131.09903.21803.21802.13122.13124.92124.13444.13442.54322.54321.7362

picture of 2,5-Cyclohexadienone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C5 121.689 C1 C3 H8 116.322
C1 C4 C6 121.689 C1 C4 H9 116.322
C2 C5 C3 122.883 C2 C5 H10 117.072
C2 C6 C4 122.883 C2 C6 H11 117.072
C3 C1 C4 116.617 C3 C1 O7 121.691
C3 C5 H10 120.044 C4 C1 O7 121.691
C4 C6 H11 120.044 C5 C2 C6 114.238
C5 C2 H12 109.446 C5 C2 H13 109.446
C5 C3 H8 121.989 C6 C2 H12 109.446
C6 C2 H13 109.446 C6 C4 H9 121.989
H12 C2 H13 104.356
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.142      
2 C -0.547      
3 C 0.106      
4 C 0.106      
5 C 0.002      
6 C 0.002      
7 O -0.483      
8 H 0.154      
9 H 0.154      
10 H 0.148      
11 H 0.148      
12 H 0.175      
13 H 0.175      


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 -4.903 4.903
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.028 0.000 0.000
y 0.000 -37.037 0.000
z 0.000 0.000 -46.974
Traceless
 xyz
x -1.023 0.000 0.000
y 0.000 7.964 0.000
z 0.000 0.000 -6.941
Polar
3z2-r2-13.882
x2-y2-5.991
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.456 0.000 0.000
y 0.000 9.920 0.000
z 0.000 0.000 14.993


<r2> (average value of r2) Å2
<r2> 188.968
(<r2>)1/2 13.747