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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-157.158568
Energy at 298.15K-157.167148
HF Energy-157.158568
Nuclear repulsion energy124.136593
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 B3PW91/6-31G*
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' 3241 3101 28.18      
2 A' 3160 3024 16.70      
3 A' 3154 3018 21.03      
4 A' 3120 2985 18.85      
5 A' 3046 2914 35.68      
6 A' 1540 1474 0.99      
7 A' 1525 1459 7.95      
8 A' 1449 1386 3.03      
9 A' 1412 1350 2.60      
10 A' 1253 1199 0.12      
11 A' 1224 1171 0.06      
12 A' 1072 1025 6.05      
13 A' 1015 972 10.77      
14 A' 951 910 3.73      
15 A' 809 774 5.92      
16 A' 781 747 1.42      
17 A' 364 348 0.20      
18 A" 3227 3087 0.27      
19 A" 3150 3013 26.50      
20 A" 3118 2983 30.67      
21 A" 1518 1452 2.03      
22 A" 1490 1425 1.97      
23 A" 1208 1156 0.53      
24 A" 1152 1102 0.31      
25 A" 1120 1071 5.32      
26 A" 1078 1031 1.86      
27 A" 894 855 6.97      
28 A" 825 789 5.28      
29 A" 342 327 0.80      
30 A" 226 216 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24230.9 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 23181.7 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 B3PW91/6-31G*
ABC
0.52205 0.21099 0.18539

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.345 0.401 0.000
C2 -0.878 1.286 0.000
H3 1.291 0.942 0.000
C4 0.345 -0.901 0.753
C5 0.345 -0.901 -0.753
H6 1.253 -1.205 1.269
H7 1.253 -1.205 -1.269
H8 -0.571 -1.193 1.262
H9 -0.571 -1.193 -1.262
H10 -1.796 0.686 0.000
H11 -0.904 1.931 0.887
H12 -0.904 1.931 -0.887

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51011.08951.50491.50492.23952.23952.23032.23032.16022.16562.1656
C21.51012.19632.61742.61743.51563.51562.79902.79901.09681.09701.0970
H31.08952.19632.20492.20492.49512.49513.10173.10173.09762.56592.5659
C41.50492.61742.20491.50671.08702.23741.08782.23282.76983.09923.5039
C51.50492.61742.20491.50672.23741.08702.23281.08782.76983.50393.0992
H62.23953.51562.49511.08702.23742.53811.82363.11943.80543.82614.3750
H72.23953.51562.49512.23741.08702.53813.11941.82363.80544.37503.8261
H82.23032.79903.10171.08782.23281.82363.11942.52362.57363.16483.8068
H92.23032.79903.10172.23281.08783.11941.82362.52362.57363.80683.1648
H102.16021.09683.09762.76982.76983.80543.80542.57362.57361.77011.7701
H112.16561.09702.56593.09923.50393.82614.37503.16483.80681.77011.7735
H122.16561.09702.56593.50393.09924.37503.82613.80683.16481.77011.7735

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.926 C1 C2 H11 111.347
C1 C2 H12 111.347 C1 C4 H5 59.959
C1 C4 H6 118.659 C1 C4 H8 117.794
C1 H5 C4 59.959 C1 H5 H7 118.659
C1 H5 H9 117.794 C2 C1 C3 114.341
C2 C1 C4 120.484 C2 C1 H5 120.484
C3 C1 C4 115.468 C3 C1 H5 115.468
C4 C1 H5 60.083 C4 H5 H7 118.322
C4 H5 H9 117.866 H5 C4 H6 118.322
H5 C4 H8 117.866 H6 C4 H8 113.972
H7 H5 H9 113.972 H10 C2 H11 107.584
H10 C2 H12 107.584 H11 C2 H12 107.873
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.126      
2 C -0.512      
3 H 0.166      
4 C -0.359      
5 C -0.359      
6 H 0.173      
7 H 0.173      
8 H 0.172      
9 H 0.172      
10 H 0.161      
11 H 0.169      
12 H 0.169      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.024 0.102 0.000 0.105
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.817 0.192 0.000
y 0.192 -26.779 0.000
z 0.000 0.000 -26.558
Traceless
 xyz
x 1.851 0.192 0.000
y 0.192 -1.092 0.000
z 0.000 0.000 -0.760
Polar
3z2-r2-1.519
x2-y21.962
xy0.192
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.835 -0.399 0.000
y -0.399 6.277 0.000
z 0.000 0.000 5.876


<r2> (average value of r2) Å2
<r2> 83.370
(<r2>)1/2 9.131