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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B3LYP/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 B3LYP/6-31G**
 hartrees
Energy at 0K-157.223733
Energy at 298.15K-157.232313
HF Energy-157.223733
Nuclear repulsion energy123.928514
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 B3LYP/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' 3224 3098 30.29      
2 A' 3143 3020 18.82      
3 A' 3137 3014 19.60      
4 A' 3101 2979 20.38      
5 A' 3032 2913 35.09      
6 A' 1529 1469 0.91      
7 A' 1514 1455 6.02      
8 A' 1439 1383 2.06      
9 A' 1404 1349 3.83      
10 A' 1240 1192 0.13      
11 A' 1216 1168 0.04      
12 A' 1064 1023 6.41      
13 A' 1003 964 6.21      
14 A' 947 910 3.60      
15 A' 799 768 4.01      
16 A' 771 741 2.41      
17 A' 365 351 0.19      
18 A" 3210 3084 0.28      
19 A" 3133 3010 26.46      
20 A" 3098 2976 33.09      
21 A" 1507 1448 1.41      
22 A" 1484 1426 1.16      
23 A" 1204 1156 0.39      
24 A" 1149 1104 0.29      
25 A" 1114 1070 4.44      
26 A" 1077 1035 1.13      
27 A" 875 841 6.67      
28 A" 822 790 4.69      
29 A" 343 329 0.64      
30 A" 228 219 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24086.0 cm-1
Scaled (by 0.9608) Zero Point Vibrational Energy (zpe) 23141.8 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 B3LYP/6-31G**
ABC
0.52028 0.21008 0.18450

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.346 0.402 0.000
C2 -0.880 1.290 0.000
H3 1.291 0.944 0.000
C4 0.346 -0.904 0.756
C5 0.346 -0.904 -0.756
H6 1.252 -1.208 1.271
H7 1.252 -1.208 -1.271
H8 -0.569 -1.196 1.264
H9 -0.569 -1.196 -1.264
H10 -1.797 0.690 0.000
H11 -0.906 1.935 0.886
H12 -0.906 1.935 -0.886

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51401.08881.50871.50872.24262.24262.23332.23332.16292.16872.1687
C21.51402.19822.62432.62433.52173.52172.80572.80571.09581.09611.0961
H31.08882.19822.20822.20822.49942.49943.10373.10373.09852.56792.5679
C41.50872.62432.20821.51131.08602.24111.08682.23622.77623.10553.5102
C51.50872.62432.20821.51132.24111.08602.23621.08682.77623.51023.1055
H62.24263.52172.49941.08602.24112.54271.82163.12163.81063.83224.3806
H72.24263.52172.49942.24111.08602.54273.12161.82163.81064.38063.8322
H82.23332.80573.10371.08682.23621.82163.12162.52722.58123.17143.8125
H92.23332.80573.10372.23621.08683.12161.82162.52722.58123.81253.1714
H102.16291.09583.09852.77622.77623.81063.81062.58122.58121.76851.7685
H112.16871.09612.56793.10553.51023.83224.38063.17143.81251.76851.7715
H122.16871.09612.56793.51023.10554.38063.83223.81253.17141.76851.7715

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.928 C1 C2 H11 111.376
C1 C2 H12 111.376 C1 C4 H5 59.942
C1 C4 H6 118.696 C1 C4 H8 117.816
C1 H5 C4 59.942 C1 H5 H7 118.696
C1 H5 H9 117.816 C2 C1 C3 114.262
C2 C1 C4 120.502 C2 C1 H5 120.502
C3 C1 C4 115.504 C3 C1 H5 115.504
C4 C1 H5 60.116 C4 H5 H7 118.349
C4 H5 H9 117.862 H5 C4 H6 118.349
H5 C4 H8 117.862 H6 C4 H8 113.929
H7 H5 H9 113.929 H10 C2 H11 107.577
H10 C2 H12 107.577 H11 C2 H12 107.825
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.067      
2 C -0.312      
3 H 0.095      
4 C -0.221      
5 C -0.221      
6 H 0.105      
7 H 0.105      
8 H 0.105      
9 H 0.105      
10 H 0.097      
11 H 0.105      
12 H 0.105      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.018 0.106 0.000 0.108
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.123 0.169 0.000
y 0.169 -26.925 0.000
z 0.000 0.000 -26.732
Traceless
 xyz
x 1.706 0.169 0.000
y 0.169 -0.998 0.000
z 0.000 0.000 -0.708
Polar
3z2-r2-1.415
x2-y21.802
xy0.169
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.913 -0.410 0.000
y -0.410 6.361 0.000
z 0.000 0.000 5.942


<r2> (average value of r2) Å2
<r2> 83.765
(<r2>)1/2 9.152