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(2df,p)

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(2df,p)
 hartrees
Energy at 0K-194.749746
Energy at 298.15K-194.757946
HF Energy-193.963612
Nuclear repulsion energy163.329641
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(2df,p)
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' 3313 3129 6.95      
2 A' 3312 3128 6.31      
3 A' 3226 3047 5.41      
4 A' 3214 3036 1.06      
5 A' 3209 3031 5.32      
6 A' 3193 3016 6.22      
7 A' 1707 1612 17.37      
8 A' 1522 1438 1.20      
9 A' 1483 1400 0.33      
10 A' 1370 1294 0.63      
11 A' 1326 1252 2.80      
12 A' 1251 1182 3.15      
13 A' 1240 1171 1.77      
14 A' 1065 1005 2.68      
15 A' 1012 956 3.50      
16 A' 994 939 31.81      
17 A' 841 794 0.72      
18 A' 777 734 0.10      
19 A' 444 419 0.88      
20 A' 264 249 1.10      
21 A" 3300 3117 0.05      
22 A" 3205 3027 9.09      
23 A" 1484 1401 1.35      
24 A" 1211 1144 0.54      
25 A" 1145 1082 2.39      
26 A" 1079 1019 5.25      
27 A" 1040 982 7.30      
28 A" 937 885 5.66      
29 A" 926 875 35.72      
30 A" 847 800 4.58      
31 A" 688 650 4.79      
32 A" 317 300 0.82      
33 A" 125 118 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 25533.0 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 24115.9 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(2df,p)
ABC
0.50710 0.10243 0.09853

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.397 0.287 0.000
C2 0.255 -1.031 0.000
C3 -0.389 -2.202 0.000
C4 0.255 1.428 0.750
C5 0.255 1.428 -0.750
H6 -1.481 0.272 0.000
H7 1.344 -1.021 0.000
H8 0.146 -3.142 0.000
H9 -1.472 -2.248 0.000
H10 -0.393 2.126 1.262
H11 1.187 1.215 1.256
H12 -0.393 2.126 -1.262
H13 1.187 1.215 -1.256

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.47072.48871.51351.51351.08402.17733.47122.75282.23052.22502.23052.2250
C21.47071.33642.57122.57122.17111.08832.11322.11243.46112.73713.46112.7371
C32.48871.33643.76233.76232.70412.09701.08151.08344.50793.96714.50793.9671
C41.51352.57123.76231.49932.21682.78294.63224.13001.08131.08202.22592.2221
C51.51352.57123.76231.49932.21682.78294.63224.13002.22592.22211.08131.0820
H61.08402.17112.70412.21682.21683.10663.78162.51972.49283.09642.49283.0964
H72.17731.08832.09702.78292.78293.10662.43543.07103.80912.56943.80912.5694
H83.47122.11321.08154.63224.63223.78162.43541.84835.44314.65205.44314.6520
H92.75282.11241.08344.13004.13002.51973.07101.84834.67804.54284.67804.5428
H102.23053.46114.50791.08132.22592.49283.80915.44314.67801.82372.52473.1096
H112.22502.73713.96711.08202.22213.09642.56944.65204.54281.82373.10962.5126
H122.23053.46114.50792.22591.08132.49283.80915.44314.67802.52473.10961.8237
H132.22502.73713.96712.22211.08203.09642.56944.65204.54283.10962.51261.8237

picture of Ethenylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 124.819 C1 C2 H7 115.800
C1 C4 C5 60.312 C1 C4 H10 117.567
C1 C4 H11 117.038 C1 C5 C4 60.312
C1 C5 H12 117.567 C1 C5 H13 117.038
C2 C1 C4 118.981 C2 C1 C5 118.981
C2 C1 H6 115.563 C2 C3 H8 121.491
C2 C3 H9 121.261 C3 C2 H7 119.381
C4 C1 H6 116.194 C4 C5 H12 118.305
C4 C5 H13 117.923 C5 C1 H6 116.194
C5 C4 H10 118.305 C5 C4 H11 117.923
H8 C3 H9 117.247 H10 C4 H11 114.921
H12 C5 H13 114.921
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability