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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G*
 hartrees
Energy at 0K-157.014863
Energy at 298.15K-157.023463
HF Energy-157.014863
Nuclear repulsion energy124.359234
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/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' 3259 3097 24.09      
2 A' 3179 3021 16.88      
3 A' 3171 3014 16.00      
4 A' 3136 2980 18.35      
5 A' 3061 2909 32.83      
6 A' 1547 1470 1.20      
7 A' 1527 1451 8.52      
8 A' 1455 1383 3.33      
9 A' 1415 1344 2.15      
10 A' 1260 1198 0.13      
11 A' 1229 1168 0.08      
12 A' 1080 1026 4.86      
13 A' 1023 973 13.10      
14 A' 954 907 3.44      
15 A' 817 776 6.92      
16 A' 785 746 0.81      
17 A' 365 347 0.21      
18 A" 3245 3084 0.30      
19 A" 3166 3009 23.21      
20 A" 3136 2981 27.77      
21 A" 1520 1444 2.12      
22 A" 1491 1417 2.44      
23 A" 1212 1152 0.57      
24 A" 1156 1098 0.37      
25 A" 1124 1068 5.44      
26 A" 1082 1028 1.89      
27 A" 905 860 7.09      
28 A" 826 785 5.28      
29 A" 344 327 0.82      
30 A" 228 216 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24349.1 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 23139.0 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/6-31G*
ABC
0.52304 0.21211 0.18644

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.346 0.402 0.000
C2 -0.879 1.279 0.000
H3 1.291 0.944 0.000
C4 0.346 -0.898 0.752
C5 0.346 -0.898 -0.752
H6 1.253 -1.202 1.268
H7 1.253 -1.202 -1.268
H8 -0.571 -1.187 1.260
H9 -0.571 -1.187 -1.260
H10 -1.792 0.673 0.000
H11 -0.910 1.924 0.886
H12 -0.910 1.924 -0.886

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50651.08911.50221.50222.23692.23692.22602.22602.15552.16302.1630
C21.50652.19572.60902.60903.50843.50842.78672.78671.09661.09651.0965
H31.08912.19572.20252.20252.49272.49273.09773.09773.09532.56732.5673
C41.50222.60902.20251.50381.08652.23451.08742.22952.75793.09193.4966
C51.50222.60902.20251.50382.23451.08652.22951.08742.75793.49663.0919
H62.23693.50842.49271.08652.23452.53511.82393.11653.79413.82054.3693
H72.23693.50842.49272.23451.08652.53513.11651.82393.79414.36933.8205
H82.22602.78673.09771.08742.22951.82393.11652.51912.55703.15203.7949
H92.22602.78673.09772.22951.08743.11651.82392.51912.55703.79493.1520
H102.15551.09663.09532.75792.75793.79413.79412.55702.55701.76931.7693
H112.16301.09652.56733.09193.49663.82054.36933.15203.79491.76931.7729
H122.16301.09652.56733.49663.09194.36933.82053.79493.15201.76931.7729

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.816 C1 C2 H11 111.425
C1 C2 H12 111.425 C1 C4 H5 59.965
C1 C4 H6 118.678 C1 C4 H8 117.645
C1 H5 C4 59.965 C1 H5 H7 118.678
C1 H5 H9 117.645 C2 C1 C3 114.591
C2 C1 C4 120.261 C2 C1 H5 120.261
C3 C1 C4 115.491 C3 C1 H5 115.491
C4 C1 H5 60.070 C4 H5 H7 118.334
C4 H5 H9 117.828 H5 C4 H6 118.334
H5 C4 H8 117.828 H6 C4 H8 114.065
H7 H5 H9 114.065 H10 C2 H11 107.556
H10 C2 H12 107.556 H11 C2 H12 107.880
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.139      
2 C -0.523      
3 H 0.173      
4 C -0.368      
5 C -0.368      
6 H 0.179      
7 H 0.179      
8 H 0.177      
9 H 0.177      
10 H 0.165      
11 H 0.174      
12 H 0.174      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.026 0.103 0.000 0.106
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.855 0.185 0.000
y 0.185 -26.846 0.000
z 0.000 0.000 -26.617
Traceless
 xyz
x 1.876 0.185 0.000
y 0.185 -1.110 0.000
z 0.000 0.000 -0.766
Polar
3z2-r2-1.532
x2-y21.991
xy0.185
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.807 -0.398 0.000
y -0.398 6.239 0.000
z 0.000 0.000 5.846


<r2> (average value of r2) Å2
<r2> 83.092
(<r2>)1/2 9.115