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

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at CBS-Q
 hartrees
Energy at 0K-155.617063
Energy at 298.15K-155.611351
HF Energy-154.865907
Nuclear repulsion energy108.672406
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 CBS-Q
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' 3461 3461 0.01 92.62 0.30 0.46
2 A' 3275 3275 26.71 87.10 0.74 0.85
3 A' 3190 3190 24.00 231.37 0.01 0.02
4 A' 3188 3188 105.88 47.93 0.55 0.71
5 A' 2020 2020 15.00 55.26 0.22 0.36
6 A' 1661 1661 9.82 13.29 0.40 0.57
7 A' 1618 1618 6.68 20.50 0.71 0.83
8 A' 1541 1541 0.86 7.93 0.69 0.82
9 A' 1301 1301 3.36 5.49 0.49 0.66
10 A' 1199 1199 19.42 3.17 0.17 0.29
11 A' 1180 1180 23.63 0.15 0.62 0.76
12 A' 1057 1057 4.06 11.28 0.47 0.64
13 A' 1032 1032 17.21 10.74 0.47 0.64
14 A' 736 736 0.19 17.43 0.54 0.70
15 A' 346 346 1.37 1.17 0.71 0.83
16 A" 3253 3253 18.11 87.08 0.75 0.86
17 A" 3243 3243 85.92 98.06 0.75 0.86
18 A" 1615 1615 6.21 16.52 0.75 0.86
19 A" 1218 1218 2.32 2.01 0.75 0.86
20 A" 1151 1151 1.29 4.92 0.75 0.86
21 A" 1072 1072 1.46 11.56 0.75 0.86
22 A" 834 834 34.50 1.39 0.75 0.86
23 A" 333 333 9.95 1.85 0.75 0.86
24 A" 163 163 0.28 0.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 19842.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 19842.8 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 CBS-Q
ABC
0.68336 0.20937 0.17089

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.172 0.000
C2 -0.006 -1.327 0.000
C3 1.155 -0.380 0.000
C4 -0.875 1.371 0.000
H5 -0.268 -1.869 0.905
H6 -0.268 -1.869 -0.905
H7 2.223 -0.303 0.000
H8 -0.290 2.286 0.000
H9 -1.520 1.369 -0.877
H10 -1.520 1.369 0.877

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.49941.28051.48432.24932.24932.27342.13372.12372.1237
C21.49941.49822.83471.08711.08712.45323.62443.21373.2137
C31.28051.49822.68132.24992.24991.07093.03273.31403.3140
C41.48432.83472.68133.41883.41883.52171.08641.08821.0882
H52.24931.08712.24993.41881.81013.07884.25303.90223.4717
H62.24931.08712.24993.41881.81013.07884.25303.47173.9022
H72.27342.45321.07093.52173.07883.07883.60814.19204.1920
H82.13373.62443.03271.08644.25304.25303.60811.76731.7673
H92.12373.21373.31401.08823.90223.47174.19201.76731.7535
H102.12373.21373.31401.08823.47173.90224.19201.76731.7535

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 50.576 H1 C2 C6 119.983
C2 C3 C6 24.702 C2 C3 C10 73.021
C2 C6 C3 35.163 C2 C6 H4 49.432
C2 C6 H5 33.641 C3 C2 C6 120.135
C3 C6 H4 51.577 C3 C6 H5 66.279
C3 C10 H7 9.436 C3 C10 H8 65.225
C3 C10 H9 74.659 H4 C6 H5 74.649
C6 C3 C10 86.856 H7 C10 H8 58.789
H7 C10 H9 77.927 H8 C10 H9 60.258
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability