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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-156.973597
Energy at 298.15K-156.982268
HF Energy-156.973597
Nuclear repulsion energy123.952265
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' 3278 3134 26.80      
2 A' 3192 3051 13.54      
3 A' 3183 3043 16.07      
4 A' 3136 2998 21.32      
5 A' 3054 2920 35.79      
6 A' 1549 1480 1.87      
7 A' 1543 1475 11.11      
8 A' 1465 1401 6.41      
9 A' 1441 1377 0.39      
10 A' 1272 1216 0.08      
11 A' 1247 1192 0.16      
12 A' 1104 1056 17.69      
13 A' 1037 991 8.84      
14 A' 971 929 5.89      
15 A' 824 788 5.57      
16 A' 797 762 4.48      
17 A' 377 360 0.20      
18 A" 3262 3118 0.26      
19 A" 3176 3036 20.20      
20 A" 3138 3000 30.78      
21 A" 1538 1471 2.83      
22 A" 1514 1447 6.10      
23 A" 1229 1174 0.61      
24 A" 1185 1133 2.21      
25 A" 1138 1088 8.27      
26 A" 1126 1077 1.84      
27 A" 895 856 7.03      
28 A" 857 819 9.14      
29 A" 353 337 1.15      
30 A" 221 212 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24552.7 cm-1
Scaled (by 0.9559) Zero Point Vibrational Energy (zpe) 23469.9 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
0.51868 0.21076 0.18493

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 0.347 0.407 0.000
C2 -0.880 1.284 0.000
H3 1.288 0.952 0.000
C4 0.347 -0.903 0.757
C5 0.347 -0.903 -0.757
H6 1.250 -1.208 1.274
H7 1.250 -1.208 -1.274
H8 -0.568 -1.191 1.266
H9 -0.568 -1.191 -1.266
H10 -1.794 0.678 0.000
H11 -0.909 1.929 0.887
H12 -0.909 1.929 -0.887

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50801.08791.51261.51262.24612.24612.23452.23452.15752.16322.1632
C21.50802.19322.61922.61923.51693.51692.79802.79801.09691.09651.0965
H31.08792.19322.21332.21332.50722.50723.10483.10483.09412.56292.5629
C41.51262.61922.21331.51371.08482.24351.08582.23902.76653.10023.5065
C51.51262.61922.21331.51372.24351.08482.23901.08582.76653.50653.1002
H62.24613.51692.50721.08482.24352.54771.81833.12403.80063.82734.3780
H72.24613.51692.50722.24351.08482.54773.12401.81833.80064.37803.8273
H82.23452.79803.10481.08582.23901.81833.12402.53282.56913.16133.8060
H92.23452.79803.10482.23901.08583.12401.81832.53282.56913.80603.1613
H102.15751.09693.09412.76652.76653.80063.80062.56912.56911.77011.7701
H112.16321.09652.56293.10023.50653.82734.37803.16133.80601.77011.7734
H122.16321.09652.56293.50653.10024.37803.82733.80603.16131.77011.7734

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.855 C1 C2 H11 111.332
C1 C2 H12 111.332 C1 C4 H5 59.974
C1 C4 H6 118.791 C1 C4 H8 117.685
C1 H5 C4 59.974 C1 H5 H7 118.791
C1 H5 H9 117.685 C2 C1 C3 114.352
C2 C1 C4 120.258 C2 C1 H5 120.258
C3 C1 C4 115.700 C3 C1 H5 115.700
C4 C1 H5 60.051 C4 H5 H7 118.463
C4 H5 H9 117.988 H5 C4 H6 118.463
H5 C4 H8 117.988 H6 C4 H8 113.794
H7 H5 H9 113.794 H10 C2 H11 107.611
H10 C2 H12 107.611 H11 C2 H12 107.927
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 -0.177      
2 C -0.484      
3 H 0.172      
4 C -0.345      
5 C -0.345      
6 H 0.173      
7 H 0.173      
8 H 0.172      
9 H 0.172      
10 H 0.157      
11 H 0.167      
12 H 0.167      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.007 0.126 0.000 0.126
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.985 0.123 0.000
y 0.123 -26.933 0.000
z 0.000 0.000 -26.774
Traceless
 xyz
x 1.868 0.123 0.000
y 0.123 -1.054 0.000
z 0.000 0.000 -0.815
Polar
3z2-r2-1.630
x2-y21.948
xy0.123
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.710 -0.362 0.000
y -0.362 6.142 0.000
z 0.000 0.000 5.797


<r2> (average value of r2) Å2
<r2> 83.620
(<r2>)1/2 9.144