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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: PBEPBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-311G*
 hartrees
Energy at 0K-157.012839
Energy at 298.15K-157.021309
HF Energy-157.012839
Nuclear repulsion energy123.605519
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 PBEPBE/6-311G*
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' 3145 3112 37.23      
2 A' 3065 3033 23.79      
3 A' 3057 3025 19.45      
4 A' 3023 2991 22.01      
5 A' 2957 2926 41.00      
6 A' 1477 1461 1.56      
7 A' 1467 1452 11.44      
8 A' 1389 1374 4.57      
9 A' 1359 1345 1.69      
10 A' 1212 1200 0.03      
11 A' 1183 1171 0.00      
12 A' 1014 1003 4.69      
13 A' 979 969 16.03      
14 A' 920 910 3.08      
15 A' 783 775 5.96      
16 A' 756 748 1.69      
17 A' 355 351 0.22      
18 A" 3129 3096 0.37      
19 A" 3052 3020 33.17      
20 A" 3020 2989 35.31      
21 A" 1462 1447 3.14      
22 A" 1429 1415 4.27      
23 A" 1165 1153 0.85      
24 A" 1100 1088 0.05      
25 A" 1078 1067 4.89      
26 A" 1018 1008 2.25      
27 A" 858 849 7.17      
28 A" 797 788 5.43      
29 A" 334 330 0.83      
30 A" 218 216 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 23399.1 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 23155.8 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 PBEPBE/6-311G*
ABC
0.51689 0.20953 0.18404

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.347 0.405 0.000
C2 -0.880 1.289 0.000
H3 1.299 0.946 0.000
C4 0.347 -0.905 0.757
C5 0.347 -0.905 -0.757
H6 1.258 -1.211 1.276
H7 1.258 -1.211 -1.276
H8 -0.575 -1.196 1.268
H9 -0.575 -1.196 -1.268
H10 -1.804 0.687 0.000
H11 -0.910 1.939 0.890
H12 -0.910 1.939 -0.890

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51231.09551.51261.51262.25142.25142.24022.24022.16892.17422.1742
C21.51232.20582.62522.62523.52843.52842.80632.80631.10261.10261.1026
H31.09552.20582.21502.21502.50652.50653.11583.11583.11352.58072.5807
C41.51262.62522.21501.51451.09242.24901.09342.24392.78083.11203.5188
C51.51262.62522.21501.51452.24901.09242.24391.09342.78083.51883.1120
H62.25143.52842.50651.09242.24902.55171.83363.13553.82193.84354.3951
H72.25143.52842.50652.24901.09242.55173.13551.83363.82194.39513.8435
H82.24022.80633.11581.09342.24391.83363.13552.53522.58123.17523.8205
H92.24022.80633.11582.24391.09343.13551.83362.53522.58123.82053.1752
H102.16891.10263.11352.78082.78083.82193.82192.58122.58121.77681.7768
H112.17421.10262.58073.11203.51883.84354.39513.17523.82051.77681.7807
H122.17421.10262.58073.51883.11204.39513.84353.82053.17521.77681.7807

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 111.121 C1 C2 H11 111.536
C1 C2 H12 111.536 C1 C4 H5 59.959
C1 C4 H6 118.704 C1 C4 H8 117.653
C1 H5 C4 59.959 C1 H5 H7 118.704
C1 H5 H9 117.653 C2 C1 C3 114.579
C2 C1 C4 120.423 C2 C1 H5 120.423
C3 C1 C4 115.332 C3 C1 H5 115.332
C4 C1 H5 60.082 C4 H5 H7 118.343
C4 H5 H9 117.824 H5 C4 H6 118.343
H5 C4 H8 117.824 H6 C4 H8 114.043
H7 H5 H9 114.043 H10 C2 H11 107.365
H10 C2 H12 107.365 H11 C2 H12 107.701
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.213      
2 C -0.638      
3 H 0.207      
4 C -0.431      
5 C -0.431      
6 H 0.218      
7 H 0.218      
8 H 0.215      
9 H 0.215      
10 H 0.203      
11 H 0.217      
12 H 0.217      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.046 0.107 0.000 0.116
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.495 0.232 0.000
y 0.232 -27.636 0.000
z 0.000 0.000 -27.362
Traceless
 xyz
x 2.003 0.232 0.000
y 0.232 -1.207 0.000
z 0.000 0.000 -0.797
Polar
3z2-r2-1.593
x2-y22.140
xy0.232
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.431 -0.505 0.000
y -0.505 7.075 0.000
z 0.000 0.000 6.516


<r2> (average value of r2) Å2
<r2> 84.388
(<r2>)1/2 9.186