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

using model chemistry: MP2=FULL/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-155.664155
Energy at 298.15K 
HF Energy-154.919776
Nuclear repulsion energy108.597482
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/6-311+G(3df,2p)
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' 3323 3132 0.83 121.26 0.27 0.43
2 A' 3181 2999 10.77 71.01 0.72 0.84
3 A' 3096 2919 60.60 130.24 0.13 0.24
4 A' 3079 2903 18.40 218.32 0.01 0.02
5 A' 1846 1740 11.69 41.09 0.10 0.18
6 A' 1538 1450 3.52 7.07 0.44 0.61
7 A' 1504 1418 10.33 9.10 0.54 0.70
8 A' 1414 1333 0.17 3.57 0.61 0.76
9 A' 1208 1139 3.61 10.19 0.30 0.46
10 A' 1094 1031 2.02 6.67 0.08 0.14
11 A' 1066 1005 31.21 3.86 0.29 0.45
12 A' 995 938 7.60 8.10 0.12 0.21
13 A' 951 897 14.22 3.96 0.36 0.53
14 A' 689 649 0.71 12.67 0.57 0.73
15 A' 321 302 1.75 1.57 0.75 0.86
16 A" 3176 2994 31.20 94.21 0.75 0.86
17 A" 3157 2976 10.09 70.69 0.75 0.86
18 A" 1500 1414 9.10 5.13 0.75 0.86
19 A" 1129 1065 1.20 0.40 0.75 0.86
20 A" 1056 995 0.06 1.28 0.75 0.86
21 A" 1002 945 2.43 0.83 0.75 0.86
22 A" 725 684 32.15 1.12 0.75 0.86
23 A" 288 272 13.24 0.18 0.75 0.86
24 A" 164 155 0.39 0.20 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18750.3 cm-1
Scaled (by 0.9427) Zero Point Vibrational Energy (zpe) 17675.9 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/6-311+G(3df,2p)
ABC
0.69418 0.21370 0.17429

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.180 0.000
C2 -0.044 -1.322 0.000
C3 1.154 -0.411 0.000
C4 -0.841 1.384 0.000
H5 -0.314 -1.847 0.912
H6 -0.314 -1.847 -0.912
H7 2.226 -0.367 0.000
H8 -0.238 2.289 0.000
H9 -1.488 1.393 -0.876
H10 -1.488 1.393 0.876

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50251.29631.46922.24392.24392.29222.12262.11002.1100
C21.50251.50532.82151.08591.08592.46313.61633.19753.1975
C31.29631.50532.68372.24672.24671.07313.03763.31643.3164
C41.46922.82152.68373.39823.39823.53171.08661.08881.0888
H52.24391.08592.24673.39821.82383.07814.23533.88173.4457
H62.24391.08592.24673.39821.82383.07814.23533.44573.8817
H72.29222.46311.07313.53173.07813.07813.62294.20184.2018
H82.12263.61633.03761.08664.23534.23533.62291.76911.7691
H92.11003.19753.31641.08883.88173.44574.20181.76911.7519
H102.11003.19753.31641.08883.44573.88174.20181.76911.7519

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 51.058 H1 C2 C6 119.327
C2 C3 C6 24.915 C2 C3 C10 72.268
C2 C6 C3 35.730 C2 C6 H4 49.778
C2 C6 H5 32.890 C3 C2 C6 119.354
C3 C6 H4 52.036 C3 C6 H5 66.055
C3 C10 H7 9.317 C3 C10 H8 65.309
C3 C10 H9 74.685 H4 C6 H5 74.434
C6 C3 C10 86.234 H7 C10 H8 58.990
H7 C10 H9 77.967 H8 C10 H9 60.321
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability