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 C5H8 (Ethenylcyclopropane)

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-32.632365
Energy at 298.15K-32.640479
HF Energy-32.028212
Nuclear repulsion energy87.446930
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/CEP-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3297 3131 24.75      
2 A' 3287 3121 22.20      
3 A' 3202 3040 9.88      
4 A' 3197 3035 5.18      
5 A' 3184 3023 13.93      
6 A' 3177 3016 10.20      
7 A' 1706 1620 19.52      
8 A' 1544 1466 1.71      
9 A' 1486 1411 0.31      
10 A' 1368 1299 0.91      
11 A' 1319 1252 2.32      
12 A' 1258 1194 4.78      
13 A' 1239 1176 1.41      
14 A' 1072 1017 5.15      
15 A' 1003 952 8.62      
16 A' 977 927 37.81      
17 A' 833 791 2.65      
18 A' 784 744 0.75      
19 A' 439 417 1.12      
20 A' 270 256 1.25      
21 A" 3285 3119 0.05      
22 A" 3178 3017 21.14      
23 A" 1490 1415 1.71      
24 A" 1205 1144 1.00      
25 A" 1144 1086 7.48      
26 A" 1065 1011 8.57      
27 A" 1018 967 29.66      
28 A" 936 889 7.58      
29 A" 846 803 42.90      
30 A" 840 798 23.97      
31 A" 684 650 10.19      
32 A" 313 298 1.90      
33 A" 117 111 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 25381.6 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 24097.3 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 MP2/CEP-31G*
ABC
0.48920 0.09945 0.09566

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.400 0.294 0.000
C2 0.265 -1.043 0.000
C3 -0.414 -2.235 0.000
C4 0.265 1.447 0.764
C5 0.265 1.447 -0.764
H6 -1.498 0.272 0.000
H7 1.365 -1.045 0.000
H8 0.122 -3.191 0.000
H9 -1.509 -2.265 0.000
H10 -0.392 2.159 1.277
H11 1.209 1.228 1.276
H12 -0.392 2.159 -1.277
H13 1.209 1.228 -1.276

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.49302.52881.53521.53521.09732.21553.52382.78872.26012.25612.26012.2561
C21.49301.37182.60432.60432.19871.09952.15312.15443.50862.77023.50862.7702
C32.52881.37183.82113.82112.73112.13941.09601.09584.57554.03134.57554.0313
C41.53522.60433.82111.52902.25202.82914.70264.18451.09561.09552.25932.2586
C51.53522.60433.82111.52902.25202.82914.70264.18452.25932.25861.09561.0955
H61.09732.19872.73112.25202.25203.15053.82292.53702.53253.14102.53253.1410
H72.21551.09952.13942.82912.82913.15052.47943.12173.87042.61143.87042.6114
H83.52382.15311.09604.70264.70263.82292.47941.87575.52404.72605.52404.7260
H92.78872.15441.09584.18454.18452.53703.12171.87574.73814.60604.73814.6060
H102.26013.50864.57551.09562.25932.53253.87045.52404.73811.85142.55333.1532
H112.25612.77024.03131.09552.25863.14102.61144.72604.60601.85143.15322.5515
H122.26013.50864.57552.25931.09562.53253.87045.52404.73812.55333.15321.8514
H132.25612.77024.03132.25861.09553.14102.61144.72604.60603.15322.55151.8514

picture of Ethenylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 123.885 C1 C2 H7 116.604
C1 C4 C5 60.133 C1 C4 H10 117.459
C1 C4 H11 117.115 C1 C5 C4 60.133
C1 C5 H12 117.459 C1 C5 H13 117.115
C2 C1 C4 118.630 C2 C1 C5 118.630
C2 C1 H6 115.321 C2 C3 H8 121.087
C2 C3 H9 121.225 C3 C2 H7 119.511
C4 C1 H6 116.643 C4 C5 H12 117.872
C4 C5 H13 117.821 C5 C1 H6 116.643
C5 C4 H10 117.872 C5 C4 H11 117.821
H8 C3 H9 117.689 H10 C4 H11 115.340
H12 C5 H13 115.340
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability