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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: BLYP/3-21G*

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/3-21G*
 hartrees
Energy at 0K-156.242307
Energy at 298.15K-156.250775
HF Energy-156.242307
Nuclear repulsion energy122.484349
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/3-21G*
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' 3170 3149 25.70      
2 A' 3090 3069 14.94      
3 A' 3080 3060 12.39      
4 A' 3019 3000 21.60      
5 A' 2961 2942 33.06      
6 A' 1532 1522 6.65      
7 A' 1495 1485 2.46      
8 A' 1430 1421 2.98      
9 A' 1366 1357 2.45      
10 A' 1206 1198 0.31      
11 A' 1158 1151 0.04      
12 A' 1032 1025 23.30      
13 A' 970 964 0.09      
14 A' 914 908 4.90      
15 A' 780 775 1.05      
16 A' 726 722 5.53      
17 A' 357 355 0.19      
18 A" 3152 3132 0.18      
19 A" 3075 3055 20.94      
20 A" 3011 2992 32.14      
21 A" 1526 1516 2.08      
22 A" 1481 1472 2.96      
23 A" 1178 1170 0.76      
24 A" 1130 1123 1.46      
25 A" 1100 1093 5.59      
26 A" 1056 1049 2.77      
27 A" 822 816 1.48      
28 A" 795 790 10.77      
29 A" 337 335 1.16      
30 A" 222 220 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 23586.0 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 23432.7 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 BLYP/3-21G*
ABC
0.50223 0.20646 0.18110

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.356 0.421 0.000
C2 -0.904 1.286 0.000
H3 1.299 0.974 0.000
C4 0.356 -0.910 0.772
C5 0.356 -0.910 -0.772
H6 1.273 -1.211 1.280
H7 1.273 -1.211 -1.280
H8 -0.569 -1.195 1.277
H9 -0.569 -1.195 -1.277
H10 -1.808 0.652 0.000
H11 -0.941 1.932 0.895
H12 -0.941 1.932 -0.895

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.52861.09301.53891.53892.26812.26812.25752.25752.17642.18342.1834
C21.52862.22572.64712.64713.55193.55192.81002.81001.10371.10431.1043
H31.09302.22572.24372.24372.53242.53243.13383.13383.12392.59602.5960
C41.53892.64712.24371.54371.09082.26751.09132.26552.77853.12713.5412
C51.53892.64712.24371.54372.26751.09082.26551.09132.77853.54123.1271
H62.26813.55192.53241.09082.26752.56001.84183.15103.82163.86464.4176
H72.26813.55192.53242.26751.09082.56003.15101.84183.82164.41763.8646
H82.25752.81003.13381.09132.26551.84183.15102.55332.56463.17243.8252
H92.25752.81003.13382.26551.09133.15101.84182.55332.56463.82523.1724
H102.17641.10373.12392.77852.77853.82163.82162.56462.56461.78621.7862
H112.18341.10432.59603.12713.54123.86464.41763.17243.82521.78621.7890
H122.18341.10432.59603.54123.12714.41763.86463.82523.17241.78621.7890

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.510 C1 C2 H11 111.020
C1 C2 H12 111.020 C1 C4 H5 59.897
C1 C4 H6 118.195 C1 C4 H8 117.235
C1 H5 C4 59.897 C1 H5 H7 118.195
C1 H5 H9 117.235 C2 C1 C3 115.188
C2 C1 C4 119.300 C2 C1 H5 119.300
C3 C1 C4 115.932 C3 C1 H5 115.932
C4 C1 H5 60.206 C4 H5 H7 117.765
C4 H5 H9 117.554 H5 C4 H6 117.765
H5 C4 H8 117.554 H6 C4 H8 115.143
H7 H5 H9 115.143 H10 C2 H11 107.990
H10 C2 H12 107.990 H11 C2 H12 108.191
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.214      
2 C -0.512      
3 H 0.175      
4 C -0.350      
5 C -0.350      
6 H 0.181      
7 H 0.181      
8 H 0.181      
9 H 0.181      
10 H 0.171      
11 H 0.177      
12 H 0.177      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.002 0.105 0.000 0.105
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.242 0.125 0.000
y 0.125 -27.182 0.000
z 0.000 0.000 -27.042
Traceless
 xyz
x 1.869 0.125 0.000
y 0.125 -1.040 0.000
z 0.000 0.000 -0.830
Polar
3z2-r2-1.660
x2-y21.939
xy0.125
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.618 -0.423 0.000
y -0.423 6.020 0.000
z 0.000 0.000 5.637


<r2> (average value of r2) Å2
<r2> 85.194
(<r2>)1/2 9.230