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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP2/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31+G**
 hartrees
Energy at 0K-156.689564
Energy at 298.15K-156.698242
HF Energy-156.111047
Nuclear repulsion energy124.466020
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 MP2/6-31+G**
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' 3323 3126 19.59      
2 A' 3235 3043 16.66      
3 A' 3222 3031 11.55      
4 A' 3196 3006 17.85      
5 A' 3104 2920 34.55      
6 A' 1565 1472 0.92      
7 A' 1547 1455 8.77      
8 A' 1468 1381 3.95      
9 A' 1431 1346 2.55      
10 A' 1269 1194 0.06      
11 A' 1244 1170 0.17      
12 A' 1097 1032 11.67      
13 A' 1034 972 11.17      
14 A' 968 911 1.96      
15 A' 822 773 4.73      
16 A' 796 748 4.20      
17 A' 371 349 0.22      
18 A" 3311 3114 0.16      
19 A" 3216 3025 19.20      
20 A" 3197 3007 27.04      
21 A" 1535 1444 2.10      
22 A" 1514 1424 1.81      
23 A" 1231 1158 0.86      
24 A" 1181 1111 0.06      
25 A" 1141 1073 3.51      
26 A" 1102 1036 1.73      
27 A" 903 849 10.84      
28 A" 851 801 5.18      
29 A" 351 330 0.66      
30 A" 232 218 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24728.0 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 23259.2 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 MP2/6-31+G**
ABC
0.52178 0.21276 0.18685

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.348 0.406 0.000
C2 -0.885 1.274 0.000
H3 1.289 0.945 0.000
C4 0.348 -0.895 0.755
C5 0.348 -0.895 -0.755
H6 1.253 -1.200 1.263
H7 1.253 -1.200 -1.263
H8 -0.568 -1.179 1.256
H9 -0.568 -1.179 -1.256
H10 -1.782 0.653 0.000
H11 -0.919 1.912 0.885
H12 -0.919 1.912 -0.885

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50791.08411.50461.50462.23422.23422.22042.22042.14472.15772.1577
C21.50792.19862.60712.60713.50483.50482.77442.77441.09141.09121.0912
H31.08412.19862.20032.20032.48902.48903.08833.08833.08502.56752.5675
C41.50462.60712.20031.50971.08112.23201.08222.22802.73983.08303.4894
C51.50462.60712.20031.50972.23201.08112.22801.08222.73983.48943.0830
H62.23423.50482.48901.08112.23202.52581.82073.10813.77333.81344.3601
H72.23423.50482.48902.23201.08112.52583.10811.82073.77334.36013.8134
H82.22042.77443.08831.08222.22801.82073.10812.51222.53173.13353.7766
H92.22042.77443.08832.22801.08223.10811.82072.51222.53173.77663.1335
H102.14471.09143.08502.73982.73983.77333.77332.53172.53171.76461.7646
H112.15771.09122.56753.08303.48943.81344.36013.13353.77661.76461.7690
H122.15771.09122.56753.48943.08304.36013.81343.77663.13351.76461.7690

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.166 C1 C2 H11 111.223
C1 C2 H12 111.223 C1 C4 H5 59.887
C1 C4 H6 118.634 C1 C4 H8 117.337
C1 H5 C4 59.887 C1 H5 H7 118.634
C1 H5 H9 117.337 C2 C1 C3 115.059
C2 C1 C4 119.866 C2 C1 H5 119.866
C3 C1 C4 115.458 C3 C1 H5 115.458
C4 C1 H5 60.225 C4 H5 H7 118.030
C4 H5 H9 117.592 H5 C4 H6 118.030
H5 C4 H8 117.592 H6 C4 H8 114.633
H7 H5 H9 114.633 H10 C2 H11 107.898
H10 C2 H12 107.898 H11 C2 H12 108.305
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability