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

using model chemistry: PBEPBE/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-155.739683
Energy at 298.15K 
HF Energy-155.739683
Nuclear repulsion energy107.764300
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 PBEPBE/6-31G(2df,p)
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' 3215 3182 0.37 118.79 0.30 0.46
2 A' 3055 3023 14.35 84.57 0.72 0.84
3 A' 2962 2932 18.68 274.41 0.01 0.02
4 A' 2960 2929 82.45 47.88 0.66 0.80
5 A' 1826 1807 11.02 54.73 0.19 0.32
6 A' 1478 1463 8.19 17.19 0.39 0.56
7 A' 1431 1416 8.90 21.64 0.67 0.80
8 A' 1350 1336 0.36 21.44 0.52 0.68
9 A' 1172 1160 0.62 4.86 0.39 0.56
10 A' 1062 1051 16.17 1.82 0.30 0.46
11 A' 1031 1020 19.68 0.11 0.75 0.86
12 A' 962 952 5.30 8.81 0.46 0.63
13 A' 922 912 11.66 8.51 0.63 0.78
14 A' 675 668 0.43 16.44 0.56 0.72
15 A' 313 310 1.73 1.80 0.74 0.85
16 A" 3022 2991 5.89 87.44 0.75 0.86
17 A" 3020 2989 57.93 93.35 0.75 0.86
18 A" 1425 1411 6.67 15.20 0.75 0.86
19 A" 1089 1077 0.75 2.35 0.75 0.86
20 A" 1014 1003 0.74 4.56 0.75 0.86
21 A" 959 949 3.23 8.35 0.75 0.86
22 A" 713 706 22.61 0.93 0.75 0.86
23 A" 297 294 8.63 0.68 0.75 0.86
24 A" 164 162 0.46 0.34 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18056.6 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 17870.6 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 PBEPBE/6-31G(2df,p)
ABC
0.68472 0.21070 0.17190

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.183 0.000
C2 -0.041 -1.331 0.000
C3 1.160 -0.414 0.000
C4 -0.843 1.392 0.000
H5 -0.321 -1.871 0.919
H6 -0.321 -1.871 -0.919
H7 2.243 -0.363 0.000
H8 -0.241 2.314 0.000
H9 -1.505 1.406 -0.884
H10 -1.505 1.406 0.884

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.51471.30451.47402.27302.27302.30862.14492.13132.1313
C21.51471.51072.83871.10221.10222.48083.65093.22733.2273
C31.30451.51072.69712.27152.27151.08463.06723.34613.3461
C41.47402.83872.69713.42963.42963.55051.10151.10451.1045
H52.27301.10222.27153.42961.83863.11374.28553.92273.4839
H62.27301.10222.27153.42961.83863.11374.28553.48393.9227
H72.30862.48081.08463.55053.11373.11373.65234.23804.2380
H82.14493.65093.06721.10154.28554.28553.65231.79041.7904
H92.13133.22733.34611.10453.92273.48394.23801.79041.7679
H102.13133.22733.34611.10453.48393.92274.23801.79041.7679

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 51.086 H1 C2 C6 119.755
C2 C3 C6 24.862 C2 C3 C10 72.363
C2 C6 C3 35.185 C2 C6 H4 49.413
C2 C6 H5 33.485 C3 C2 C6 119.952
C3 C6 H4 51.742 C3 C6 H5 66.127
C3 C10 H7 9.401 C3 C10 H8 65.367
C3 C10 H9 74.682 H4 C6 H5 74.452
C6 C3 C10 86.349 H7 C10 H8 58.953
H7 C10 H9 77.961 H8 C10 H9 60.414
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.317      
2 C -0.357      
3 C -0.196      
4 C -0.541      
5 H 0.098      
6 H 0.098      
7 H 0.132      
8 H 0.145      
9 H 0.152      
10 H 0.152      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.162 0.942 0.000 0.956
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.177 -0.585 0.000
y -0.585 -24.855 0.000
z 0.000 0.000 -25.110
Traceless
 xyz
x 1.805 -0.585 0.000
y -0.585 -0.711 0.000
z 0.000 0.000 -1.094
Polar
3z2-r2-2.188
x2-y21.678
xy-0.585
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.828 -0.629 0.000
y -0.629 7.281 0.000
z 0.000 0.000 4.555


<r2> (average value of r2) Å2
<r2> 80.580
(<r2>)1/2 8.977