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

using model chemistry: CCD/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 CCD/6-31G*
 hartrees
Energy at 0K-155.414557
Energy at 298.15K 
HF Energy-154.866657
Nuclear repulsion energy107.979419
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 CCD/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' 3322 3144 0.05      
2 A' 3165 2996 15.89      
3 A' 3091 2925 60.72      
4 A' 3074 2910 21.47      
5 A' 1908 1806 8.84      
6 A' 1580 1496 6.91      
7 A' 1539 1457 7.66      
8 A' 1460 1382 0.07      
9 A' 1252 1185 1.89      
10 A' 1131 1071 11.55      
11 A' 1115 1055 25.74      
12 A' 1012 958 4.57      
13 A' 972 920 13.38      
14 A' 702 664 0.25      
15 A' 333 315 1.40      
16 A" 3155 2986 51.23      
17 A" 3144 2976 17.32      
18 A" 1531 1449 7.47      
19 A" 1154 1092 1.12      
20 A" 1075 1018 0.46      
21 A" 1018 964 1.86      
22 A" 704 666 30.97      
23 A" 291 276 11.04      
24 A" 149 141 0.43      

Unscaled Zero Point Vibrational Energy (zpe) 18938.4 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 17925.2 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 CCD/6-31G*
ABC
0.68810 0.21091 0.17217

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.177 0.000
C2 -0.045 -1.330 0.000
C3 1.156 -0.415 0.000
C4 -0.842 1.397 0.000
H5 -0.322 -1.867 0.914
H6 -0.322 -1.867 -0.914
H7 2.236 -0.368 0.000
H8 -0.225 2.302 0.000
H9 -1.492 1.413 -0.884
H10 -1.492 1.413 0.884

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50781.29901.48252.26142.26142.30092.13742.12942.1294
C21.50781.50962.84151.09501.09502.47523.63713.22503.2250
C31.29901.50962.69772.26362.26361.08063.04883.33693.3369
C41.48252.84152.69773.42893.42893.54761.09531.09711.0971
H52.26141.09502.26363.42891.82733.10184.26903.91883.4823
H62.26141.09502.26363.42891.82733.10184.26903.48233.9188
H72.30092.47521.08063.54763.10183.10183.63114.22424.2242
H82.13743.63713.04881.09534.26904.26903.63111.78201.7820
H92.12943.22503.33691.09713.91883.48234.22421.78201.7679
H102.12943.22503.33691.09713.48233.91884.22421.78201.7679

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 50.999 H1 C2 C6 119.809
C2 C3 C6 24.805 C2 C3 C10 72.597
C2 C6 C3 35.335 C2 C6 H4 49.443
C2 C6 H5 33.449 C3 C2 C6 119.860
C3 C6 H4 51.780 C3 C6 H5 66.195
C3 C10 H7 9.423 C3 C10 H8 65.056
C3 C10 H9 74.639 H4 C6 H5 74.546
C6 C3 C10 86.577 H7 C10 H8 58.641
H7 C10 H9 77.921 H8 C10 H9 60.261
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability