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All results from a given calculation for C4H6 (1-Methylcyclopropene)

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 C1 1A
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-155.887923
Energy at 298.15K 
HF Energy-155.887923
Nuclear repulsion energy108.185617
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' 3297 3154 0.44      
2 A' 3139 3003 17.36      
3 A' 3047 2915 18.18      
4 A' 3044 2912 90.17      
5 A' 1889 1807 11.09      
6 A' 1553 1485 9.21      
7 A' 1506 1440 9.42      
8 A' 1426 1365 0.19      
9 A' 1220 1167 1.14      
10 A' 1108 1060 16.11      
11 A' 1083 1036 26.42      
12 A' 996 952 5.90      
13 A' 953 912 13.71      
14 A' 697 667 0.49      
15 A' 323 309 1.87      
16 A" 3109 2974 7.10      
17 A" 3102 2967 72.53      
18 A" 1501 1436 8.24      
19 A" 1137 1088 0.44      
20 A" 1061 1015 1.27      
21 A" 997 954 3.04      
22 A" 729 697 28.82      
23 A" 301 288 10.89      
24 A" 158 151 0.50      

Unscaled Zero Point Vibrational Energy (zpe) 18686.7 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 17877.6 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
0.69205 0.21175 0.17294

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 0.000 0.180 0.000
C2 -0.036 -1.327 0.000
C3 1.155 -0.411 0.000
C4 -0.846 1.388 0.000
H5 -0.314 -1.866 0.913
H6 -0.314 -1.866 -0.913
H7 2.234 -0.358 0.000
H8 -0.245 2.304 0.000
H9 -1.500 1.401 -0.881
H10 -1.500 1.401 0.881

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50711.29741.47482.26252.26252.29812.13762.12542.1254
C21.50711.50262.83311.09661.09662.46843.63623.21853.2185
C31.29741.50262.69062.26072.26071.08053.05403.33303.3330
C41.47482.83312.69063.42153.42153.54051.09501.09761.0976
H52.26251.09662.26073.42151.82683.09894.26893.91113.4755
H62.26251.09662.26073.42151.82683.09894.26893.47553.9111
H72.29812.46841.08053.54053.09893.09893.63714.22104.2210
H82.13763.63623.05401.09504.26894.26893.63711.77991.7799
H92.12543.21853.33301.09763.91113.47554.22101.77991.7614
H102.12543.21853.33301.09763.47553.91114.22101.77991.7614

picture of 1-Methylcyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C3 51.070 H1 C2 C6 119.849
C2 C3 C6 24.825 C2 C3 C10 72.523
C2 C6 C3 35.121 C2 C6 H4 49.405
C2 C6 H5 33.595 C3 C2 C6 120.054
C3 C6 H4 51.747 C3 C6 H5 66.169
C3 C10 H7 9.413 C3 C10 H8 65.339
C3 C10 H9 74.679 H4 C6 H5 74.516
C6 C3 C10 86.489 H7 C10 H8 58.922
H7 C10 H9 77.957 H8 C10 H9 60.343
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 0.167      
2 C -0.386      
3 C -0.205      
4 C -0.611      
5 H 0.147      
6 H 0.147      
7 H 0.163      
8 H 0.190      
9 H 0.193      
10 H 0.193      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.148 0.899 0.000 0.911
CHELPG        
AIM        
ESP 0.896 0.280 0.001 0.938


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.996 -0.582 0.000
y -0.582 -24.688 0.000
z 0.000 0.000 -25.121
Traceless
 xyz
x 1.909 -0.582 0.000
y -0.582 -0.629 0.000
z 0.000 0.000 -1.279
Polar
3z2-r2-2.559
x2-y21.692
xy-0.582
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.500 -0.514 0.000
y -0.514 6.842 0.000
z 0.000 0.000 4.201


<r2> (average value of r2) Å2
<r2> 80.086
(<r2>)1/2 8.949