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

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-155.022400
Energy at 298.15K 
HF Energy-155.022400
Nuclear repulsion energy107.676778
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 B3PW91/3-21G*
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' 3326 3191 0.37      
2 A' 3132 3005 12.47      
3 A' 3088 2963 47.06      
4 A' 3044 2921 16.69      
5 A' 1845 1770 8.59      
6 A' 1556 1493 4.47      
7 A' 1541 1478 11.95      
8 A' 1455 1396 3.46      
9 A' 1191 1143 5.55      
10 A' 1106 1061 9.02      
11 A' 1076 1032 54.75      
12 A' 977 938 0.31      
13 A' 943 905 12.36      
14 A' 650 624 0.39      
15 A' 324 311 2.56      
16 A" 3165 3036 43.99      
17 A" 3099 2974 9.70      
18 A" 1539 1477 10.81      
19 A" 1134 1088 0.10      
20 A" 1081 1038 4.49      
21 A" 1014 973 4.14      
22 A" 777 746 42.11      
23 A" 311 298 16.61      
24 A" 147 141 0.50      

Unscaled Zero Point Vibrational Energy (zpe) 18762.3 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 18000.6 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 B3PW91/3-21G*
ABC
0.67911 0.21055 0.17143

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.182 0.000
C2 -0.078 -1.346 0.000
C3 1.148 -0.432 0.000
C4 -0.807 1.416 0.000
H5 -0.357 -1.862 0.919
H6 -0.357 -1.862 -0.919
H7 2.221 -0.394 0.000
H8 -0.171 2.307 0.000
H9 -1.458 1.444 -0.884
H10 -1.458 1.444 0.884

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.53061.30231.47382.26942.26942.29412.13182.12162.1216
C21.53061.53012.85641.09011.09012.48833.65473.23643.2364
C31.30231.53012.68992.27062.27061.07283.04013.33123.3312
C41.47382.85642.68993.43333.43333.52701.09541.09851.0985
H52.26941.09012.27063.43331.83863.10524.27313.92363.4849
H62.26941.09012.27063.43331.83863.10524.27313.48493.9236
H72.29412.48831.07283.52703.10523.10523.60754.20664.2066
H82.13183.65473.04011.09544.27314.27313.60751.78451.7845
H92.12163.23643.33121.09853.92363.48494.20661.78451.7677
H102.12163.23643.33121.09853.48493.92364.20661.78451.7677

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 50.364 H1 C2 C6 119.025
C2 C3 C6 24.783 C2 C3 C10 73.097
C2 C6 C3 36.041 C2 C6 H4 49.943
C2 C6 H5 32.508 C3 C2 C6 119.176
C3 C6 H4 51.492 C3 C6 H5 66.117
C3 C10 H7 9.502 C3 C10 H8 64.921
C3 C10 H9 74.614 H4 C6 H5 74.469
C6 C3 C10 86.748 H7 C10 H8 58.403
H7 C10 H9 77.871 H8 C10 H9 60.310
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.017      
2 C -0.388      
3 C -0.191      
4 C -0.759      
5 H 0.203      
6 H 0.203      
7 H 0.201      
8 H 0.233      
9 H 0.241      
10 H 0.241      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.184 0.878 0.000 0.897
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.225 -0.562 0.000
y -0.562 -24.535 0.000
z 0.000 0.000 -25.708
Traceless
 xyz
x 1.896 -0.562 0.000
y -0.562 -0.068 0.000
z 0.000 0.000 -1.828
Polar
3z2-r2-3.656
x2-y21.310
xy-0.562
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.082 -0.475 0.000
y -0.475 6.500 0.000
z 0.000 0.000 3.787


<r2> (average value of r2) Å2
<r2> 80.672
(<r2>)1/2 8.982