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: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-193.492244
Energy at 298.15K-193.498381
HF Energy-192.824392
Nuclear repulsion energy156.334773
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 MP2/6-311G*
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 3261 3099 3.84      
2 A1 3237 3076 8.97      
3 A1 3067 2915 5.76      
4 A1 1544 1467 0.62      
5 A1 1446 1374 13.30      
6 A1 1416 1346 13.72      
7 A1 1137 1080 0.30      
8 A1 1037 986 0.11      
9 A1 950 903 11.21      
10 A1 810 770 0.01      
11 A2 1138 1082 0.00      
12 A2 874 830 0.00      
13 A2 684 650 0.00      
14 A2 501 476 0.00      
15 B1 3112 2957 6.11      
16 B1 920 874 27.67      
17 B1 903 859 0.00      
18 B1 669 636 91.70      
19 B1 321 305 9.38      
20 B2 3254 3092 20.86      
21 B2 3228 3068 2.19      
22 B2 1620 1540 0.71      
23 B2 1327 1261 2.25      
24 B2 1282 1218 1.95      
25 B2 1119 1063 1.90      
26 B2 997 947 12.36      
27 B2 814 773 4.72      

Unscaled Zero Point Vibrational Energy (zpe) 20333.6 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 19323.0 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 MP2/6-311G*
ABC
0.28081 0.27426 0.14241

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.880 0.000 1.876
H2 -0.880 0.000 1.876
H3 0.000 2.214 0.614
H4 0.000 -2.214 0.614
H5 0.000 1.351 -1.888
H6 0.000 -1.351 -1.888
C7 0.000 1.180 0.286
C8 0.000 -1.180 0.286
C9 0.000 0.000 1.217
C10 0.000 0.735 -0.995
C11 0.000 -0.735 -0.995

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 C9 C10 C11
H11.75922.69542.69544.09434.09432.16652.16651.09863.09063.0906
H21.75922.69542.69544.09434.09432.16652.16651.09863.09063.0906
H32.69542.69544.42732.64674.35521.08453.40962.29442.18543.3588
H42.69542.69544.42734.35522.64673.40961.08452.29443.35882.1854
H54.09434.09432.64674.35522.70202.18053.33653.38651.08532.2689
H64.09434.09434.35522.64672.70203.33652.18053.38652.26891.0853
C72.16652.16651.08453.40962.18053.33652.36021.50351.35582.3035
C82.16652.16653.40961.08453.33652.18052.36021.50352.30351.3558
C91.09861.09862.29442.29443.38653.38651.50351.50352.33092.3309
C103.09063.09062.18543.35881.08532.26891.35582.30352.33091.4694
C113.09063.09063.35882.18542.26891.08532.30351.35582.33091.4694

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 106.385 H1 C9 C7 111.791
H1 C9 C8 111.791 H2 C9 C7 111.791
H2 C9 C8 111.791 H3 C7 C9 124.088
H3 C7 C10 126.805 H4 C8 C9 124.088
H4 C8 C11 126.805 H5 C10 C7 126.216
H5 C10 C11 124.604 H6 C11 C8 126.216
H6 C11 C10 124.604 C7 C9 C8 103.426
C7 C10 C11 109.180 C8 C11 C10 109.180
C9 C7 C10 109.107 C9 C8 C11 109.107
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability