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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP4/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/aug-cc-pVDZ
 hartrees
Energy at 0K-156.772685
Energy at 298.15K-156.781215
HF Energy-156.110225
Nuclear repulsion energy123.071049
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 MP4/6-31G*
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' 3245 3170        
2 A' 3162 3089        
3 A' 3156 3083        
4 A' 3122 3050        
5 A' 3046 2976        
6 A' 1558 1522        
7 A' 1545 1510        
8 A' 1468 1434        
9 A' 1431 1398        
10 A' 1261 1231        
11 A' 1238 1209        
12 A' 1096 1070        
13 A' 1024 1001        
14 A' 961 939        
15 A' 814 795        
16 A' 788 770        
17 A' 369 361        
18 A" 3232 3157        
19 A" 3151 3078        
20 A" 3126 3054        
21 A" 1538 1503        
22 A" 1509 1474        
23 A" 1225 1196        
24 A" 1180 1153        
25 A" 1136 1110        
26 A" 1096 1071        
27 A" 896 875        
28 A" 842 823        
29 A" 345 337        
30 A" 224 219        

Unscaled Zero Point Vibrational Energy (zpe) 24391.4 cm-1
Scaled (by 0.9769) Zero Point Vibrational Energy (zpe) 23827.9 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 MP4/aug-cc-pVDZ
ABC
0.50758 0.20895 0.18344

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.354 0.415 0.000
C2 -0.898 1.278 0.000
H3 1.304 0.965 0.000
C4 0.354 -0.902 0.765
C5 0.354 -0.902 -0.765
H6 1.272 -1.210 1.276
H7 1.272 -1.210 -1.276
H8 -0.575 -1.188 1.272
H9 -0.575 -1.188 -1.272
H10 -1.803 0.641 0.000
H11 -0.939 1.926 0.896
H12 -0.939 1.926 -0.896

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.52111.09761.52301.52302.26072.26072.24722.24722.16842.18122.1812
C21.52112.22462.62812.62813.53993.53992.79372.79371.10641.10611.1061
H31.09762.22462.22972.22972.52142.52143.12753.12753.12342.59992.5999
C41.52302.62812.22971.53051.09482.25901.09602.25732.75973.11193.5251
C51.52302.62812.22971.53052.25901.09482.25731.09602.75973.52513.1119
H62.26073.53992.52141.09482.25902.55111.84713.14683.80883.85594.4090
H72.26073.53992.52142.25901.09482.55113.14681.84713.80884.40903.8559
H82.24722.79373.12751.09602.25731.84713.14682.54432.54353.15723.8114
H92.24722.79373.12752.25731.09603.14681.84712.54432.54353.81143.1572
H102.16841.10643.12342.75972.75973.80883.80882.54352.54351.78841.7884
H112.18121.10612.59993.11193.52513.85594.40903.15723.81141.78841.7919
H122.18121.10612.59993.52513.11194.40903.85593.81143.15721.78841.7919

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.231 C1 C2 H11 111.266
C1 C2 H12 111.266 C1 C4 H5 59.836
C1 C4 H6 118.534 C1 C4 H8 117.261
C1 H5 C4 59.836 C1 H5 H7 118.534
C1 H5 H9 117.261 C2 C1 C3 115.369
C2 C1 C4 119.386 C2 C1 H5 119.386
C3 C1 C4 115.657 C3 C1 H5 115.657
C4 C1 H5 60.328 C4 H5 H7 117.780
C4 H5 H9 117.547 H5 C4 H6 117.780
H5 C4 H8 117.547 H6 C4 H8 114.938
H7 H5 H9 114.938 H10 C2 H11 107.872
H10 C2 H12 107.872 H11 C2 H12 108.200
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability