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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: wB97X-D/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 wB97X-D/6-31G*
 hartrees
Energy at 0K-157.162559
Energy at 298.15K-157.171162
HF Energy-157.162559
Nuclear repulsion energy 
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 wB97X-D/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' 3264 3095 29.00      
2 A' 3188 3024 18.93      
3 A' 3175 3012 15.09      
4 A' 3131 2970 23.88      
5 A' 3057 2899 33.89      
6 A' 1555 1475 1.47      
7 A' 1530 1451 8.24      
8 A' 1462 1387 3.21      
9 A' 1423 1350 2.26      
10 A' 1253 1188 0.06      
11 A' 1231 1167 0.05      
12 A' 1081 1025 6.79      
13 A' 1018 965 9.46      
14 A' 960 911 4.27      
15 A' 816 774 4.38      
16 A' 788 747 3.55      
17 A' 374 355 0.21      
18 A" 3250 3082 0.29      
19 A" 3170 3006 26.71      
20 A" 3133 2972 30.97      
21 A" 1530 1451 1.98      
22 A" 1504 1426 2.36      
23 A" 1220 1157 0.51      
24 A" 1164 1104 0.48      
25 A" 1127 1069 5.12      
26 A" 1090 1034 1.59      
27 A" 894 848 7.36      
28 A" 838 795 5.91      
29 A" 353 335 0.76      
30 A" 212 201 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 24394.0 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 23137.7 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 wB97X-D/6-31G*
ABC
0.52133 0.21144 0.18582

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.346 0.401 0.000
C2 -0.881 1.284 0.000
H3 1.290 0.944 0.000
C4 0.346 -0.900 0.753
C5 0.346 -0.900 -0.753
H6 1.254 -1.203 1.268
H7 1.254 -1.203 -1.268
H8 -0.570 -1.191 1.261
H9 -0.570 -1.191 -1.261
H10 -1.796 0.679 0.000
H11 -0.905 1.927 0.887
H12 -0.905 1.927 -0.887

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51171.08851.50371.50372.23712.23712.22862.22862.15982.16352.1635
C21.51172.19722.61602.61603.51423.51422.79532.79531.09641.09601.0960
H31.08852.19722.20422.20422.49372.49373.09993.09993.09672.56352.5635
C41.50372.61602.20421.50681.08642.23641.08742.23232.76573.09443.4999
C51.50372.61602.20421.50682.23641.08642.23231.08742.76573.49993.0944
H62.23713.51422.49371.08642.23642.53601.82403.11833.80123.82124.3706
H72.23713.51422.49372.23641.08642.53603.11831.82403.80124.37063.8212
H82.22862.79533.09991.08742.23231.82403.11832.52232.56733.15823.8014
H92.22862.79533.09992.23231.08743.11831.82402.52232.56733.80143.1582
H102.15981.09643.09672.76572.76573.80123.80122.56732.56731.77101.7710
H112.16351.09602.56353.09443.49993.82124.37063.15823.80141.77101.7746
H122.16351.09602.56353.49993.09444.37063.82123.80143.15821.77101.7746

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.805 C1 C2 H11 111.128
C1 C2 H12 111.128 C1 C4 H5 59.932
C1 C4 H6 118.590 C1 C4 H8 117.758
C1 H5 C4 59.932 C1 H5 H7 118.590
C1 H5 H9 117.758 C2 C1 C3 114.369
C2 C1 C4 120.349 C2 C1 H5 120.349
C3 C1 C4 115.565 C3 C1 H5 115.565
C4 C1 H5 60.136 C4 H5 H7 118.275
C4 H5 H9 117.837 H5 C4 H6 118.275
H5 C4 H8 117.837 H6 C4 H8 114.092
H7 H5 H9 114.092 H10 C2 H11 107.761
H10 C2 H12 107.761 H11 C2 H12 108.111
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.124      
2 C -0.499      
3 H 0.165      
4 C -0.357      
5 C -0.357      
6 H 0.172      
7 H 0.172      
8 H 0.170      
9 H 0.170      
10 H 0.157      
11 H 0.166      
12 H 0.166      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.029 0.109 0.000 0.113
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.842 0.189 0.000
y 0.189 -26.806 0.000
z 0.000 0.000 -26.572
Traceless
 xyz
x 1.847 0.189 0.000
y 0.189 -1.099 0.000
z 0.000 0.000 -0.748
Polar
3z2-r2-1.497
x2-y21.964
xy0.189
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.819 -0.370 0.000
y -0.370 6.241 0.000
z 0.000 0.000 5.881


<r2> (average value of r2) Å2
<r2> 83.254
(<r2>)1/2 9.124