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

using model chemistry: HF/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 HF/6-31G(2df,p)
 hartrees
Energy at 0K-154.888951
Energy at 298.15K 
HF Energy-154.888951
Nuclear repulsion energy109.022940
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 HF/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' 3446 3120 0.35 89.50 0.30 0.46
2 A' 3252 2945 24.72 80.11 0.73 0.85
3 A' 3171 2871 21.46 206.73 0.00 0.01
4 A' 3167 2868 100.51 66.68 0.35 0.52
5 A' 2012 1822 15.68 53.80 0.21 0.34
6 A' 1651 1495 8.23 12.17 0.38 0.56
7 A' 1600 1449 6.67 17.22 0.70 0.82
8 A' 1530 1385 0.96 6.40 0.66 0.79
9 A' 1292 1170 3.97 5.58 0.46 0.63
10 A' 1200 1087 17.75 3.07 0.14 0.25
11 A' 1186 1074 24.59 0.18 0.30 0.46
12 A' 1053 954 2.18 9.96 0.46 0.63
13 A' 1036 938 17.06 11.11 0.40 0.57
14 A' 735 665 0.20 16.93 0.52 0.68
15 A' 349 316 1.40 1.29 0.71 0.83
16 A" 3230 2925 14.12 78.85 0.75 0.86
17 A" 3222 2918 78.68 91.49 0.75 0.86
18 A" 1598 1447 5.98 13.30 0.75 0.86
19 A" 1215 1100 2.36 1.64 0.75 0.86
20 A" 1150 1041 1.40 4.24 0.75 0.86
21 A" 1070 969 1.56 8.63 0.75 0.86
22 A" 855 774 32.13 1.14 0.75 0.86
23 A" 340 308 9.25 1.42 0.75 0.86
24 A" 170 154 0.28 0.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 19764.6 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 17896.8 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 HF/6-31G(2df,p)
ABC
0.70302 0.21420 0.17505

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.172 0.000
C2 0.006 -1.323 0.000
C3 1.154 -0.367 0.000
C4 -0.885 1.358 0.000
H5 -0.251 -1.866 0.903
H6 -0.251 -1.866 -0.903
H7 2.218 -0.281 0.000
H8 -0.310 2.277 0.000
H9 -1.528 1.347 -0.875
H10 -1.528 1.347 0.875

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.49521.27401.47982.24292.24292.26342.12782.11722.1172
C21.49521.49442.82521.08441.08442.44523.61413.20173.2017
C31.27401.49442.67122.24402.24401.06673.02273.30173.3017
C41.47982.82522.67123.40733.40733.50891.08421.08611.0861
H52.24291.08442.24403.40731.80673.06924.24043.88823.4577
H62.24291.08442.24403.40731.80673.06924.24043.45773.8882
H72.26342.44521.06673.50893.06923.06923.59614.17704.1770
H82.12783.61413.02271.08424.24044.24043.59611.76461.7646
H92.11723.20173.30171.08613.88823.45774.17701.76461.7505
H102.11723.20173.30171.08613.45773.88824.17701.76461.7505

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 50.448 H1 C2 C6 119.952
C2 C3 C6 24.710 C2 C3 C10 73.008
C2 C6 C3 35.176 C2 C6 H4 49.457
C2 C6 H5 33.591 C3 C2 C6 120.114
C3 C6 H4 51.546 C3 C6 H5 66.262
C3 C10 H7 9.418 C3 C10 H8 65.249
C3 C10 H9 74.627 H4 C6 H5 74.626
C6 C3 C10 86.834 H7 C10 H8 58.834
H7 C10 H9 77.904 H8 C10 H9 60.264
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.180      
2 C -0.345      
3 C -0.224      
4 C -0.479      
5 H 0.112      
6 H 0.112      
7 H 0.177      
8 H 0.154      
9 H 0.157      
10 H 0.157      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.104 0.923 0.000 0.929
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.228 -0.482 0.000
y -0.482 -25.208 0.000
z 0.000 0.000 -25.460
Traceless
 xyz
x 2.106 -0.482 0.000
y -0.482 -0.865 0.000
z 0.000 0.000 -1.242
Polar
3z2-r2-2.483
x2-y21.980
xy-0.482
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.433 -0.465 0.000
y -0.465 6.646 0.000
z 0.000 0.000 4.346


<r2> (average value of r2) Å2
<r2> 79.465
(<r2>)1/2 8.914