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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: BLYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/STO-3G
 hartrees
Energy at 0K-155.203004
Energy at 298.15K-155.211279
HF Energy-155.203004
Nuclear repulsion energy121.314644
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 BLYP/STO-3G
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' 3442 3184 0.45      
2 A' 3373 3120 2.86      
3 A' 3333 3084 1.64      
4 A' 3294 3048 0.29      
5 A' 3204 2964 5.05      
6 A' 1645 1522 2.84      
7 A' 1595 1475 0.89      
8 A' 1531 1416 1.65      
9 A' 1467 1357 5.40      
10 A' 1275 1180 0.83      
11 A' 1251 1158 0.65      
12 A' 1164 1077 1.61      
13 A' 1040 962 0.94      
14 A' 985 912 4.42      
15 A' 828 766 1.99      
16 A' 810 750 0.80      
17 A' 365 338 0.19      
18 A" 3435 3178 0.00      
19 A" 3357 3105 3.12      
20 A" 3288 3042 0.35      
21 A" 1639 1516 1.87      
22 A" 1563 1446 0.14      
23 A" 1252 1158 0.01      
24 A" 1214 1123 0.94      
25 A" 1162 1075 2.74      
26 A" 1152 1065 3.78      
27 A" 930 861 0.95      
28 A" 857 793 2.91      
29 A" 343 318 0.55      
30 A" 189 175 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25489.6 cm-1
Scaled (by 0.9252) Zero Point Vibrational Energy (zpe) 23583.0 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 BLYP/STO-3G
ABC
0.50007 0.20020 0.17606

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.353 0.413 0.000
C2 -0.903 1.325 0.000
H3 1.313 0.964 0.000
C4 0.353 -0.929 0.772
C5 0.353 -0.929 -0.772
H6 1.277 -1.230 1.295
H7 1.277 -1.230 -1.295
H8 -0.576 -1.229 1.284
H9 -0.576 -1.229 -1.284
H10 -1.830 0.717 0.000
H11 -0.912 1.976 0.899
H12 -0.912 1.976 -0.899

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.55201.10661.54761.54762.28622.28622.28242.28242.20372.20322.2032
C21.55202.24442.69262.69263.59873.59872.87712.87711.10841.11021.1102
H31.10662.24442.25802.25802.54762.54763.16673.16673.15192.60442.6044
C41.54762.69262.25801.54361.10322.28341.10322.27652.84033.17123.5821
C51.54762.69262.25801.54362.28341.10322.27651.10322.84033.58213.1712
H62.28623.59872.54761.10322.28342.58931.85323.17583.88773.90234.4589
H72.28623.59872.54762.28341.10322.58933.17581.85323.88774.45893.9023
H82.28242.87713.16671.10322.27651.85323.17582.56872.64693.24593.8927
H92.28242.87713.16672.27651.10323.17581.85322.56872.64693.89273.2459
H102.20371.10843.15192.84032.84033.88773.88772.64692.64691.79871.7987
H112.20321.11022.60443.17123.58213.90234.45893.24593.89271.79871.7974
H122.20321.11022.60443.58213.17124.45893.90233.89273.24591.79871.7974

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.754 C1 C2 H11 110.608
C1 C2 H12 110.608 C1 C4 H5 60.084
C1 C4 H6 118.227 C1 C4 H8 117.887
C1 H5 C4 60.084 C1 H5 H7 118.227
C1 H5 H9 117.887 C2 C1 C3 114.128
C2 C1 C4 120.619 C2 C1 H5 120.619
C3 C1 C4 115.585 C3 C1 H5 115.585
C4 C1 H5 59.831 C4 H5 H7 118.292
C4 H5 H9 117.685 H5 C4 H6 118.292
H5 C4 H8 117.685 H6 C4 H8 114.260
H7 H5 H9 114.260 H10 C2 H11 108.339
H10 C2 H12 108.339 H11 C2 H12 108.102
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.072      
2 C -0.210      
3 H 0.074      
4 C -0.160      
5 C -0.160      
6 H 0.077      
7 H 0.077      
8 H 0.077      
9 H 0.077      
10 H 0.073      
11 H 0.074      
12 H 0.074      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.049 0.106 0.000 0.117
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.728 0.082 0.000
y 0.082 -25.274 0.000
z 0.000 0.000 -25.271
Traceless
 xyz
x 1.544 0.082 0.000
y 0.082 -0.774 0.000
z 0.000 0.000 -0.771
Polar
3z2-r2-1.541
x2-y21.545
xy0.082
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.175 -0.239 0.000
y -0.239 3.467 0.000
z 0.000 0.000 3.132


<r2> (average value of r2) Å2
<r2> 85.872
(<r2>)1/2 9.267