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: mPW1PW91/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-194.078419
Energy at 298.15K-194.084639
HF Energy-194.078419
Nuclear repulsion energy156.680712
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 mPW1PW91/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3262 3126 2.11      
2 A1 3237 3102 10.04      
3 A1 3048 2921 8.52      
4 A1 1576 1511 1.96      
5 A1 1408 1349 0.40      
6 A1 1385 1328 28.00      
7 A1 1126 1079 0.15      
8 A1 1032 989 0.27      
9 A1 944 905 12.57      
10 A1 812 779 0.00      
11 A2 1110 1064 0.00      
12 A2 937 898 0.00      
13 A2 708 679 0.00      
14 A2 522 500 0.00      
15 B1 3083 2954 4.72      
16 B1 947 907 0.11      
17 B1 903 865 36.59      
18 B1 674 646 77.07      
19 B1 341 327 7.46      
20 B2 3255 3119 16.26      
21 B2 3226 3092 2.84      
22 B2 1653 1584 0.02      
23 B2 1319 1264 1.28      
24 B2 1258 1205 1.38      
25 B2 1102 1056 2.55      
26 B2 976 935 16.10      
27 B2 811 777 7.38      

Unscaled Zero Point Vibrational Energy (zpe) 20326.9 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 19479.3 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 mPW1PW91/aug-cc-pVDZ
ABC
0.28240 0.27551 0.14315

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.879 0.000 1.877
H2 -0.879 0.000 1.877
H3 0.000 2.213 0.612
H4 0.000 -2.213 0.612
H5 0.000 1.352 -1.886
H6 0.000 -1.352 -1.886
C7 0.000 1.176 0.284
C8 0.000 -1.176 0.284
C9 0.000 0.000 1.212
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
H11.75872.69602.69604.09344.09342.16612.16611.10223.08763.0876
H21.75872.69602.69604.09344.09342.16612.16611.10223.08763.0876
H32.69602.69604.42542.64184.35281.08723.40462.29262.18193.3532
H42.69602.69604.42544.35282.64183.40461.08722.29263.35322.1819
H54.09344.09342.64184.35282.70432.17703.33173.37991.08822.2685
H64.09344.09344.35282.64182.70433.33172.17703.37992.26851.0882
C72.16612.16611.08723.40462.17703.33172.35221.49801.35022.2954
C82.16612.16613.40461.08723.33172.17702.35221.49802.29541.3502
C91.10221.10222.29262.29263.37993.37991.49801.49802.32162.3216
C103.08763.08762.18193.35321.08822.26851.35022.29542.32161.4651
C113.08763.08763.35322.18192.26851.08822.29541.35022.32161.4651

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 105.838 H1 C9 C7 111.928
H1 C9 C8 111.928 H2 C9 C7 111.928
H2 C9 C8 111.928 H3 C7 C9 124.177
H3 C7 C10 126.732 H4 C8 C9 124.177
H4 C8 C11 126.732 H5 C10 C7 126.114
H5 C10 C11 124.707 H6 C11 C8 126.114
H6 C11 C10 124.707 C7 C9 C8 103.460
C7 C10 C11 109.179 C8 C11 C10 109.179
C9 C7 C10 109.090 C9 C8 C11 109.090
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H -0.098      
2 H -0.098      
3 H -0.369      
4 H -0.369      
5 H -0.403      
6 H -0.403      
7 C 0.441      
8 C 0.441      
9 C 0.086      
10 C 0.385      
11 C 0.385      


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 0.500 0.500
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 6.231 0.000 0.000
y 0.000 9.503 0.000
z 0.000 0.000 10.007


<r2> (average value of r2) Å2
<r2> 93.048
(<r2>)1/2 9.646