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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B2PLYP/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 B2PLYP/6-31G*
 hartrees
Energy at 0K-156.999357
Energy at 298.15K-157.007979
HF Energy-156.827666
Nuclear repulsion energy124.145156
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 B2PLYP/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3265 3099 28.44      
2 A' 3184 3022 16.30      
3 A' 3178 3017 18.83      
4 A' 3140 2980 20.85      
5 A' 3070 2914 32.29      
6 A' 1561 1482 0.60      
7 A' 1551 1472 6.69      
8 A' 1471 1396 2.53      
9 A' 1433 1360 3.16      
10 A' 1262 1198 0.11      
11 A' 1238 1175 0.07      
12 A' 1088 1033 7.09      
13 A' 1022 970 7.28      
14 A' 964 915 3.49      
15 A' 814 772 4.04      
16 A' 786 746 2.73      
17 A' 369 350 0.20      
18 A" 3251 3086 0.30      
19 A" 3173 3012 23.73      
20 A" 3140 2980 31.61      
21 A" 1543 1465 1.63      
22 A" 1515 1438 1.20      
23 A" 1227 1165 0.44      
24 A" 1175 1115 0.22      
25 A" 1137 1080 4.22      
26 A" 1097 1041 1.35      
27 A" 892 847 6.97      
28 A" 839 797 5.02      
29 A" 346 328 0.66      
30 A" 229 217 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24479.3 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 23235.7 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 B2PLYP/6-31G*
ABC
0.52114 0.21113 0.18545

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.347 0.403 0.000
C2 -0.881 1.284 0.000
H3 1.290 0.944 0.000
C4 0.347 -0.901 0.755
C5 0.347 -0.901 -0.755
H6 1.252 -1.204 1.269
H7 1.252 -1.204 -1.269
H8 -0.569 -1.190 1.261
H9 -0.569 -1.190 -1.261
H10 -1.792 0.677 0.000
H11 -0.910 1.927 0.886
H12 -0.910 1.927 -0.886

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51111.08731.50671.50672.23962.23962.22882.22882.15682.16472.1647
C21.51112.19772.61722.61723.51473.51472.79422.79421.09481.09481.0948
H31.08732.19772.20522.20522.49592.49593.09843.09843.09422.56752.5675
C41.50672.61722.20521.50931.08472.23791.08562.23282.76323.09733.5023
C51.50672.61722.20521.50932.23791.08472.23281.08562.76323.50233.0973
H62.23963.51472.49591.08472.23792.53871.82083.11763.79743.82474.3732
H72.23963.51472.49592.23791.08472.53873.11761.82083.79744.37323.8247
H82.22882.79423.09841.08562.23281.82083.11762.52242.56393.15803.8000
H92.22882.79423.09842.23281.08563.11761.82082.52242.56393.80003.1580
H102.15681.09483.09422.76322.76323.79743.79742.56392.56391.76771.7677
H112.16471.09482.56753.09733.50233.82474.37323.15803.80001.76771.7711
H122.16471.09482.56753.50233.09734.37323.82473.80003.15801.76771.7711

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.707 C1 C2 H11 111.337
C1 C2 H12 111.337 C1 C4 H5 59.943
C1 C4 H6 118.686 C1 C4 H8 117.668
C1 H5 C4 59.943 C1 H5 H7 118.686
C1 H5 H9 117.668 C2 C1 C3 114.536
C2 C1 C4 120.283 C2 C1 H5 120.283
C3 C1 C4 115.501 C3 C1 H5 115.501
C4 C1 H5 60.115 C4 H5 H7 118.328
C4 H5 H9 117.815 H5 C4 H6 118.328
H5 C4 H8 117.815 H6 C4 H8 114.066
H7 H5 H9 114.066 H10 C2 H11 107.666
H10 C2 H12 107.666 H11 C2 H12 107.963
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.106      
2 C -0.459      
3 H 0.149      
4 C -0.330      
5 C -0.330      
6 H 0.157      
7 H 0.157      
8 H 0.156      
9 H 0.156      
10 H 0.145      
11 H 0.152      
12 H 0.152      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.027 0.103 0.000 0.107
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.238 0.205 0.000
y 0.205 -27.127 0.000
z 0.000 0.000 -26.882
Traceless
 xyz
x 1.767 0.205 0.000
y 0.205 -1.067 0.000
z 0.000 0.000 -0.700
Polar
3z2-r2-1.399
x2-y21.889
xy0.205
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.757 -0.378 0.000
y -0.378 6.171 0.000
z 0.000 0.000 5.801


<r2> (average value of r2) Å2
<r2> 83.556
(<r2>)1/2 9.141