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 C5H6 (1,3-Cyclopentadiene)

using model chemistry: B3LYP/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 B3LYP/6-31+G**
 hartrees
Energy at 0K-194.119816
Energy at 298.15K-194.126023
HF Energy-194.119816
Nuclear repulsion energy156.308352
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/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 3241 3125 2.40      
2 A1 3217 3101 13.18      
3 A1 3024 2915 10.29      
4 A1 1556 1500 1.77      
5 A1 1418 1368 5.48      
6 A1 1403 1353 19.00      
7 A1 1132 1091 0.30      
8 A1 1017 981 0.25      
9 A1 927 894 11.28      
10 A1 811 782 0.01      
11 A2 1120 1080 0.00      
12 A2 954 920 0.00      
13 A2 712 687 0.00      
14 A2 521 502 0.00      
15 B1 3049 2940 7.32      
16 B1 953 919 0.18      
17 B1 918 885 34.67      
18 B1 681 657 87.10      
19 B1 344 332 8.25      
20 B2 3235 3119 20.51      
21 B2 3207 3092 3.80      
22 B2 1641 1582 0.09      
23 B2 1321 1273 0.99      
24 B2 1271 1225 1.91      
25 B2 1116 1076 2.82      
26 B2 971 937 15.56      
27 B2 813 784 6.61      

Unscaled Zero Point Vibrational Energy (zpe) 20285.0 cm-1
Scaled (by 0.9642) Zero Point Vibrational Energy (zpe) 19558.8 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/6-31+G**
ABC
0.28096 0.27379 0.14230

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.878 0.000 1.881
H2 -0.878 0.000 1.881
H3 0.000 2.215 0.610
H4 0.000 -2.215 0.610
H5 0.000 1.349 -1.887
H6 0.000 -1.349 -1.887
C7 0.000 1.182 0.283
C8 0.000 -1.182 0.283
C9 0.000 0.000 1.218
C10 0.000 0.735 -0.993
C11 0.000 -0.735 -0.993

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 C9 C10 C11
H11.75632.70032.70034.09794.09792.17302.17301.10043.09413.0941
H21.75632.70032.70034.09794.09792.17302.17301.10043.09413.0941
H32.70032.70034.42932.64314.35151.08363.41192.29662.18183.3570
H42.70032.70034.42934.35152.64313.41191.08362.29663.35702.1818
H54.09794.09792.64314.35152.69792.17673.33373.38581.08472.2675
H64.09794.09794.35152.64312.69793.33372.17673.38582.26751.0847
C72.17302.17301.08363.41192.17673.33372.36311.50691.35212.3024
C82.17302.17303.41191.08363.33372.17672.36311.50692.30241.3521
C91.10041.10042.29662.29663.38583.38581.50691.50692.33032.3303
C103.09413.09412.18183.35701.08472.26751.35212.30242.33031.4696
C113.09413.09413.35702.18182.26751.08472.30241.35212.33031.4696

picture of 1,3-Cyclopentadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C9 H2 105.889 H1 C9 C7 111.961
H1 C9 C8 111.961 H2 C9 C7 111.961
H2 C9 C8 111.961 H3 C7 C9 124.071
H3 C7 C10 126.859 H4 C8 C9 124.071
H4 C8 C11 126.859 H5 C10 C7 126.223
H5 C10 C11 124.484 H6 C11 C8 126.223
H6 C11 C10 124.484 C7 C9 C8 103.276
C7 C10 C11 109.293 C8 C11 C10 109.293
C9 C7 C10 109.070 C9 C8 C11 109.070
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.169      
2 H 0.169      
3 H 0.128      
4 H 0.128      
5 H 0.123      
6 H 0.123      
7 C -0.062      
8 C -0.062      
9 C -0.481      
10 C -0.117      
11 C -0.117      


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 0.515 0.515
CHELPG        
AIM        
ESP 0.002 0.000 0.503 0.503


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.864 0.000 0.000
y 0.000 9.152 0.000
z 0.000 0.000 9.877


<r2> (average value of r2) Å2
<r2> 93.678
(<r2>)1/2 9.679