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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-155.843555
Energy at 298.15K 
HF Energy-155.843555
Nuclear repulsion energy107.708460
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
4/u)
Dep P Dep U
1 A' 3337 3196 0.10      
2 A' 3140 3007 20.02      
3 A' 3077 2947 63.14      
4 A' 3041 2912 29.55      
5 A' 1874 1795 10.30      
6 A' 1564 1498 5.75      
7 A' 1524 1460 11.26      
8 A' 1455 1394 1.83      
9 A' 1215 1164 4.48      
10 A' 1122 1075 14.25      
11 A' 1105 1058 40.16      
12 A' 1002 960 2.36      
13 A' 962 921 14.19      
14 A' 679 651 0.53      
15 A' 331 317 2.09      
16 A" 3148 3014 63.60      
17 A" 3108 2976 16.36      
18 A" 1521 1456 11.20      
19 A" 1144 1095 0.03      
20 A" 1080 1034 2.95      
21 A" 1008 965 3.13      
22 A" 752 721 42.25      
23 A" 304 291 14.71      
24 A" 149 143 0.54      

Unscaled Zero Point Vibrational Energy (zpe) 18820.0 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 18023.9 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
0.68243 0.21037 0.17139

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 0.183 0.000
C2 -0.074 -1.340 0.000
C3 1.151 -0.436 0.000
C4 -0.809 1.414 0.000
H5 -0.361 -1.868 0.912
H6 -0.361 -1.868 -0.912
H7 2.226 -0.404 0.000
H8 -0.182 2.311 0.000
H9 -1.463 1.450 -0.881
H10 -1.463 1.450 0.881

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.52501.30661.47222.27402.27402.30182.13522.12612.1261
C21.52501.52232.84961.09241.09242.48273.65223.23823.2382
C31.30661.52232.69442.27342.27341.07543.05273.34113.3411
C41.47222.84962.69443.43533.43533.53731.09491.09781.0978
H52.27401.09242.27343.43531.82433.10884.28113.92903.4962
H62.27401.09242.27343.43531.82433.10884.28113.49623.9290
H72.30182.48271.07543.53733.10883.10883.62864.22144.2214
H82.13523.65223.05271.09494.28114.28113.62861.77761.7776
H92.12613.23823.34111.09783.92903.49624.22141.77761.7614
H102.12613.23823.34111.09783.49623.92904.22141.77761.7614

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 50.781 H1 C2 C6 119.724
C2 C3 C6 24.620 C2 C3 C10 72.882
C2 C6 C3 35.486 C2 C6 H4 49.499
C2 C6 H5 33.386 C3 C2 C6 119.895
C3 C6 H4 51.562 C3 C6 H5 66.345
C3 C10 H7 9.434 C3 C10 H8 65.085
C3 C10 H9 74.716 H4 C6 H5 74.602
C6 C3 C10 86.625 H7 C10 H8 58.625
H7 C10 H9 77.958 H8 C10 H9 60.301
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 0.058      
2 C -0.353      
3 C -0.155      
4 C -0.564      
5 H 0.147      
6 H 0.147      
7 H 0.169      
8 H 0.180      
9 H 0.186      
10 H 0.186      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.181 0.899 0.000 0.917
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.240 -0.582 0.000
y -0.582 -24.630 0.000
z 0.000 0.000 -25.361
Traceless
 xyz
x 1.756 -0.582 0.000
y -0.582 -0.330 0.000
z 0.000 0.000 -1.426
Polar
3z2-r2-2.853
x2-y21.391
xy-0.582
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.428 -0.480 0.000
y -0.480 6.811 0.000
z 0.000 0.000 4.094


<r2> (average value of r2) Å2
<r2> 80.679
(<r2>)1/2 8.982