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: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-194.580647
Energy at 298.15K-194.588862
HF Energy-193.938967
Nuclear repulsion energy162.991261
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 MP2/6-31G*
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' 3306 3118 14.49      
2 A' 3303 3115 12.20      
3 A' 3215 3032 3.27      
4 A' 3214 3031 6.50      
5 A' 3207 3024 9.79      
6 A' 3185 3003 8.87      
7 A' 1730 1632 15.22      
8 A' 1567 1478 1.11      
9 A' 1513 1427 0.22      
10 A' 1398 1318 0.59      
11 A' 1348 1271 3.17      
12 A' 1273 1200 3.03      
13 A' 1263 1191 1.41      
14 A' 1105 1042 3.17      
15 A' 1036 977 5.34      
16 A' 1003 946 32.91      
17 A' 855 806 0.96      
18 A' 796 751 0.22      
19 A' 451 426 0.97      
20 A' 273 257 1.08      
21 A" 3291 3104 0.09      
22 A" 3203 3021 13.44      
23 A" 1526 1439 1.42      
24 A" 1238 1167 0.63      
25 A" 1166 1100 2.50      
26 A" 1106 1043 5.45      
27 A" 1027 968 11.71      
28 A" 957 902 8.39      
29 A" 905 853 41.21      
30 A" 863 813 6.47      
31 A" 684 645 4.46      
32 A" 318 300 1.23      
33 A" 120 113 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 25721.3 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 24255.2 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 MP2/6-31G*
ABC
0.50633 0.10187 0.09800

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.388 0.288 0.000
C2 0.258 -1.038 0.000
C3 -0.403 -2.204 0.000
C4 0.258 1.432 0.749
C5 0.258 1.432 -0.749
H6 -1.476 0.271 0.000
H7 1.349 -1.043 0.000
H8 0.120 -3.155 0.000
H9 -1.489 -2.241 0.000
H10 -0.393 2.129 1.268
H11 1.193 1.227 1.261
H12 -0.393 2.129 -1.268
H13 1.193 1.227 -1.261

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.47492.49211.51231.51231.08812.18813.47952.75862.23522.22962.23522.2296
C21.47491.34022.58152.58152.17241.09152.12072.12083.47292.75653.47292.7565
C32.49211.34023.77103.77102.69772.10211.08461.08634.51473.98924.51473.9892
C41.51232.58153.77101.49822.21672.80704.64944.13601.08501.08562.23062.2262
C51.51232.58153.77101.49822.21672.80704.64944.13602.23062.22621.08501.0856
H61.08812.17242.69772.21672.21673.11563.77892.51262.49613.10262.49613.1026
H72.18811.09152.10212.80702.80703.11562.44333.08063.83432.60183.83432.6018
H83.47952.12071.08464.64944.64943.77892.44331.84965.45744.68445.45744.6844
H92.75862.12081.08634.13604.13602.51263.08061.84964.68054.56244.68054.5624
H102.23523.47294.51471.08502.23062.49613.83435.45744.68051.82402.53523.1176
H112.22962.75653.98921.08562.22623.10262.60184.68444.56241.82403.11762.5213
H122.23523.47294.51472.23061.08502.49613.83435.45744.68052.53523.11761.8240
H132.22962.75653.98922.22621.08563.10262.60184.68444.56243.11762.52131.8240

picture of Ethenylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 124.501 C1 C2 H7 116.201
C1 C4 C5 60.309 C1 C4 H10 117.824
C1 C4 H11 117.292 C1 C5 C4 60.309
C1 C5 H12 117.824 C1 C5 H13 117.292
C2 C1 C4 119.579 C2 C1 C5 119.579
C2 C1 H6 115.072 C2 C3 H8 121.634
C2 C3 H9 121.512 C3 C2 H7 119.298
C4 C1 H6 115.996 C4 C5 H12 118.547
C4 C5 H13 118.115 C5 C1 H6 115.996
C5 C4 H10 118.547 C5 C4 H11 118.115
H8 C3 H9 116.855 H10 C4 H11 114.350
H12 C5 H13 114.350
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability