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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-156.654771
Energy at 298.15K-156.663443
HF Energy-156.095304
Nuclear repulsion energy124.178930
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 MP3/6-31G*
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' 3287 3085 24.54      
2 A' 3209 3012 14.28      
3 A' 3201 3005 15.37      
4 A' 3166 2972 18.74      
5 A' 3092 2902 26.40      
6 A' 1582 1485 1.05      
7 A' 1562 1466 7.42      
8 A' 1490 1398 3.51      
9 A' 1450 1361 1.78      
10 A' 1280 1201 0.13      
11 A' 1254 1177 0.06      
12 A' 1117 1049 7.08      
13 A' 1039 976 9.48      
14 A' 974 914 3.21      
15 A' 827 777 4.80      
16 A' 801 752 2.42      
17 A' 375 352 0.20      
18 A" 3275 3073 0.26      
19 A" 3195 2999 18.76      
20 A" 3170 2975 27.54      
21 A" 1553 1458 1.85      
22 A" 1527 1433 2.11      
23 A" 1241 1165 0.50      
24 A" 1198 1124 0.23      
25 A" 1150 1080 4.41      
26 A" 1117 1048 1.53      
27 A" 916 860 7.40      
28 A" 855 803 4.97      
29 A" 350 329 0.67      
30 A" 227 213 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24739.4 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 23220.4 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 MP3/6-31G*
ABC
0.52091 0.21144 0.18571

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.347 0.403 0.000
C2 -0.883 1.282 0.000
H3 1.291 0.945 0.000
C4 0.347 -0.899 0.754
C5 0.347 -0.899 -0.754
H6 1.253 -1.203 1.269
H7 1.253 -1.203 -1.269
H8 -0.569 -1.188 1.261
H9 -0.569 -1.188 -1.261
H10 -1.791 0.669 0.000
H11 -0.911 1.924 0.887
H12 -0.911 1.924 -0.887

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51161.08811.50531.50532.23892.23892.22772.22772.15452.16372.1637
C21.51162.19942.61542.61543.51423.51422.79112.79111.09561.09531.0953
H31.08812.19942.20482.20482.49552.49553.09843.09843.09392.56742.5674
C41.50532.61542.20481.50891.08542.23811.08642.23322.75703.09353.4996
C51.50532.61542.20481.50892.23811.08542.23321.08642.75703.49963.0935
H62.23893.51422.49551.08542.23812.53901.82243.11883.79253.82184.3716
H72.23893.51422.49552.23811.08542.53903.11881.82243.79254.37163.8218
H82.22772.79113.09841.08642.23321.82243.11882.52292.55593.15273.7968
H92.22772.79113.09842.23321.08643.11881.82242.52292.55593.79683.1527
H102.15451.09563.09392.75702.75703.79253.79252.55592.55591.77071.7707
H112.16371.09532.56743.09353.49963.82184.37163.15273.79681.77071.7744
H122.16371.09532.56743.49963.09354.37163.82183.79683.15271.77071.7744

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.440 C1 C2 H11 111.193
C1 C2 H12 111.193 C1 C4 H5 59.919
C1 C4 H6 118.688 C1 C4 H8 117.629
C1 H5 C4 59.919 C1 H5 H7 118.688
C1 H5 H9 117.629 C2 C1 C3 114.583
C2 C1 C4 120.208 C2 C1 H5 120.208
C3 C1 C4 115.523 C3 C1 H5 115.523
C4 C1 H5 60.161 C4 H5 H7 118.326
C4 H5 H9 117.819 H5 C4 H6 118.326
H5 C4 H8 117.819 H6 C4 H8 114.096
H7 H5 H9 114.096 H10 C2 H11 107.843
H10 C2 H12 107.843 H11 C2 H12 108.194
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability