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 C4H8 (methylcyclopropane)

using model chemistry: PBE1PBE/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBE1PBE/cc-pVTZ
 hartrees
Energy at 0K-157.069675
Energy at 298.15K-157.078286
HF Energy-157.069675
Nuclear repulsion energy124.772325
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 PBE1PBE/cc-pVTZ
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' 3235 3109 21.67      
2 A' 3157 3033 16.74      
3 A' 3146 3023 12.02      
4 A' 3106 2985 19.54      
5 A' 3036 2917 32.47      
6 A' 1516 1457 1.68      
7 A' 1493 1435 9.55      
8 A' 1427 1371 3.97      
9 A' 1391 1337 1.75      
10 A' 1246 1197 0.02      
11 A' 1215 1167 0.02      
12 A' 1059 1018 4.20      
13 A' 1013 974 13.75      
14 A' 942 905 2.63      
15 A' 808 777 7.21      
16 A' 777 747 0.92      
17 A' 361 347 0.18      
18 A" 3220 3095 0.24      
19 A" 3141 3018 23.36      
20 A" 3104 2983 26.49      
21 A" 1484 1426 2.25      
22 A" 1462 1405 3.80      
23 A" 1196 1150 0.64      
24 A" 1143 1098 0.14      
25 A" 1110 1067 5.02      
26 A" 1072 1030 1.23      
27 A" 895 860 8.15      
28 A" 819 787 4.96      
29 A" 345 332 0.69      
30 A" 226 218 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24072.2 cm-1
Scaled (by 0.961) Zero Point Vibrational Energy (zpe) 23133.4 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 PBE1PBE/cc-pVTZ
ABC
0.52586 0.21371 0.18780

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.346 0.402 0.000
C2 -0.878 1.273 0.000
H3 1.288 0.940 0.000
C4 0.346 -0.894 0.750
C5 0.346 -0.894 -0.750
H6 1.250 -1.199 1.261
H7 1.250 -1.199 -1.261
H8 -0.570 -1.180 1.254
H9 -0.570 -1.180 -1.254
H10 -1.786 0.665 0.000
H11 -0.911 1.916 0.883
H12 -0.911 1.916 -0.883

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50171.08501.49761.49762.22942.22942.21652.21652.14762.15662.1566
C21.50172.19072.59912.59913.49653.49652.77192.77191.09311.09311.0931
H31.08502.19072.19442.19442.48332.48333.08503.08503.08582.56232.5623
C41.49762.59912.19441.50101.08222.22661.08332.22232.74513.08083.4847
C51.49762.59912.19441.50102.22661.08222.22231.08332.74513.48473.0808
H62.22943.49652.48331.08222.22662.52271.81983.10483.77853.80924.3551
H72.22943.49652.48332.22661.08222.52273.10481.81983.77854.35513.8092
H82.21652.77193.08501.08332.22231.81983.10482.50862.54033.13623.7773
H92.21652.77193.08502.22231.08333.10481.81982.50862.54033.77733.1362
H102.14761.09313.08582.74512.74513.77853.77852.54032.54031.76401.7640
H112.15661.09312.56233.08083.48473.80924.35513.13623.77731.76401.7668
H122.15661.09312.56233.48473.08084.35513.80923.77733.13621.76401.7668

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.734 C1 C2 H11 111.457
C1 C2 H12 111.457 C1 C4 H5 59.926
C1 C4 H6 118.685 C1 C4 H8 117.467
C1 H5 C4 59.926 C1 H5 H7 118.685
C1 H5 H9 117.467 C2 C1 C3 114.805
C2 C1 C4 120.125 C2 C1 H5 120.125
C3 C1 C4 115.428 C3 C1 H5 115.428
C4 C1 H5 60.148 C4 H5 H7 118.167
C4 H5 H9 117.716 H5 C4 H6 118.167
H5 C4 H8 117.716 H6 C4 H8 114.351
H7 H5 H9 114.351 H10 C2 H11 107.586
H10 C2 H12 107.586 H11 C2 H12 107.839
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.062      
2 C -0.295      
3 H 0.107      
4 C -0.229      
5 C -0.229      
6 H 0.107      
7 H 0.107      
8 H 0.101      
9 H 0.101      
10 H 0.089      
11 H 0.102      
12 H 0.102      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.038 0.125 0.000 0.130
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.341 0.219 0.000
y 0.219 -27.333 0.000
z 0.000 0.000 -27.075
Traceless
 xyz
x 1.862 0.219 0.000
y 0.219 -1.125 0.000
z 0.000 0.000 -0.738
Polar
3z2-r2-1.476
x2-y21.991
xy0.219
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.569 -0.513 0.000
y -0.513 7.283 0.000
z 0.000 0.000 6.727


<r2> (average value of r2) Å2
<r2> 82.909
(<r2>)1/2 9.105