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: B3PW91/6-31+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 B3PW91/6-31+G**
 hartrees
Energy at 0K-194.044907
Energy at 298.15K-194.051110
HF Energy-194.044907
Nuclear repulsion energy156.634963
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 B3PW91/6-31+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 3254 3124 2.37      
2 A1 3229 3101 11.74      
3 A1 3037 2916 8.16      
4 A1 1567 1505 2.11      
5 A1 1416 1359 0.04      
6 A1 1399 1343 27.45      
7 A1 1132 1087 0.32      
8 A1 1029 988 0.22      
9 A1 939 902 12.60      
10 A1 809 777 0.01      
11 A2 1117 1073 0.00      
12 A2 953 915 0.00      
13 A2 712 684 0.00      
14 A2 521 500 0.00      
15 B1 3070 2948 4.97      
16 B1 952 914 0.05      
17 B1 911 874 37.29      
18 B1 680 653 87.68      
19 B1 339 325 9.51      
20 B2 3248 3118 18.58      
21 B2 3219 3091 3.49      
22 B2 1650 1584 0.03      
23 B2 1323 1270 1.55      
24 B2 1269 1219 1.78      
25 B2 1114 1069 3.21      
26 B2 980 941 16.43      
27 B2 811 778 7.34      

Unscaled Zero Point Vibrational Energy (zpe) 20339.0 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 19527.4 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 B3PW91/6-31+G**
ABC
0.28214 0.27520 0.14298

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.878 0.000 1.877
H2 -0.878 0.000 1.877
H3 0.000 2.211 0.612
H4 0.000 -2.211 0.612
H5 0.000 1.348 -1.885
H6 0.000 -1.348 -1.885
C7 0.000 1.178 0.284
C8 0.000 -1.178 0.284
C9 0.000 0.000 1.214
C10 0.000 0.733 -0.991
C11 0.000 -0.733 -0.991

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 C9 C10 C11
H11.75542.69472.69474.09154.09152.16702.16701.10033.08803.0880
H21.75542.69472.69474.09154.09152.16702.16701.10033.08803.0880
H32.69472.69474.42262.64154.34781.08403.40512.29172.18103.3521
H42.69472.69474.42264.34782.64153.40511.08402.29173.35212.1810
H54.09154.09152.64154.34782.69662.17563.32963.37901.08502.2645
H64.09154.09154.34782.64152.69663.32962.17563.37902.26451.0850
C72.16702.16701.08403.40512.17563.32962.35601.50051.35112.2972
C82.16702.16703.40511.08403.32962.17562.35601.50052.29721.3511
C91.10031.10032.29172.29173.37903.37901.50051.50052.32352.3235
C103.08803.08802.18103.35211.08502.26451.35112.29722.32351.4651
C113.08803.08803.35212.18102.26451.08502.29721.35112.32351.4651

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 105.818 H1 C9 C7 111.935
H1 C9 C8 111.935 H2 C9 C7 111.935
H2 C9 C8 111.935 H3 C7 C9 124.136
H3 C7 C10 126.842 H4 C8 C9 124.136
H4 C8 C11 126.842 H5 C10 C7 126.172
H5 C10 C11 124.577 H6 C11 C8 126.172
H6 C11 C10 124.577 C7 C9 C8 103.453
C7 C10 C11 109.251 C8 C11 C10 109.251
C9 C7 C10 109.023 C9 C8 C11 109.023
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.187      
2 H 0.187      
3 H 0.152      
4 H 0.152      
5 H 0.148      
6 H 0.148      
7 C -0.087      
8 C -0.087      
9 C -0.518      
10 C -0.140      
11 C -0.140      


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 0.544 0.544
CHELPG        
AIM        
ESP        


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 5.694 0.000 0.000
y 0.000 8.993 0.000
z 0.000 0.000 9.729


<r2> (average value of r2) Å2
<r2> 93.066
(<r2>)1/2 9.647