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

using model chemistry: MP2=FULL/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 MP2=FULL/3-21G*
 hartrees
Energy at 0K-154.358016
Energy at 298.15K 
HF Energy-153.987660
Nuclear repulsion energy106.855391
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 MP2=FULL/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' 3330 3157 0.04 94.11 0.28 0.44
2 A' 3156 2992 12.16 69.78 0.74 0.85
3 A' 3150 2986 34.16 95.56 0.14 0.24
4 A' 3076 2916 14.89 119.43 0.00 0.01
5 A' 1785 1692 8.01 10.36 0.19 0.32
6 A' 1601 1518 5.51 14.42 0.47 0.64
7 A' 1590 1507 8.19 27.25 0.72 0.84
8 A' 1491 1414 0.80 15.16 0.59 0.74
9 A' 1205 1142 6.07 1.17 0.24 0.38
10 A' 1132 1073 1.34 1.12 0.18 0.30
11 A' 1100 1042 52.50 0.77 0.66 0.79
12 A' 973 922 2.36 7.88 0.75 0.86
13 A' 921 873 3.94 12.43 0.30 0.47
14 A' 615 583 0.04 14.10 0.63 0.77
15 A' 333 316 1.74 2.05 0.70 0.82
16 A" 3236 3068 36.74 68.02 0.75 0.86
17 A" 3139 2975 11.60 69.87 0.75 0.86
18 A" 1584 1501 7.44 22.54 0.75 0.86
19 A" 1153 1093 0.17 1.97 0.75 0.86
20 A" 1096 1039 2.17 3.69 0.75 0.86
21 A" 1038 984 2.29 16.68 0.75 0.86
22 A" 731 693 38.62 1.01 0.75 0.86
23 A" 295 279 14.45 1.30 0.75 0.86
24 A" 137 130 0.41 0.34 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18932.6 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 17948.1 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 MP2=FULL/3-21G*
ABC
0.66752 0.20693 0.16832

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.180 0.000
C2 -0.128 -1.364 0.000
C3 1.141 -0.469 0.000
C4 -0.762 1.458 0.000
H5 -0.416 -1.867 0.919
H6 -0.416 -1.867 -0.919
H7 2.215 -0.450 0.000
H8 -0.078 2.313 0.000
H9 -1.405 1.519 -0.886
H10 -1.405 1.519 0.886

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.54941.31311.48802.28182.28182.30272.13442.13402.1340
C21.54941.55342.89231.08591.08592.51483.67733.27563.2756
C31.31311.55342.70882.28512.28511.07353.03763.35033.3503
C41.48802.89232.70883.46673.46673.53621.09511.09661.0966
H52.28181.08592.28513.46671.83723.12544.29293.96273.5280
H62.28181.08592.28513.46671.83723.12544.29293.52803.9627
H72.30272.51481.07353.53623.12543.12543.59084.21554.2155
H82.13443.67733.03761.09514.29294.29293.59081.78241.7824
H92.13403.27563.35031.09663.96273.52804.21551.78241.7723
H102.13403.27563.35031.09663.52803.96274.21551.78241.7723

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 50.073 H1 C2 C6 118.908
C2 C3 C6 24.588 C2 C3 C10 73.775
C2 C6 C3 36.528 C2 C6 H4 50.073
C2 C6 H5 32.231 C3 C2 C6 118.884
C3 C6 H4 51.317 C3 C6 H5 66.298
C3 C10 H7 9.701 C3 C10 H8 64.326
C3 C10 H9 74.663 H4 C6 H5 74.635
C6 C3 C10 87.216 H7 C10 H8 57.595
H7 C10 H9 77.865 H8 C10 H9 60.186
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability