return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G**
 hartrees
Energy at 0K-155.449863
Energy at 298.15K 
HF Energy-154.877220
Nuclear repulsion energy108.317028
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/6-31G**
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' 3368 3147 0.02 107.51 0.29 0.44
2 A' 3233 3021 13.94 72.23 0.74 0.85
3 A' 3143 2937 61.18 120.07 0.13 0.23
4 A' 3125 2920 20.88 139.18 0.01 0.01
5 A' 1876 1753 8.44 20.69 0.19 0.32
6 A' 1593 1489 9.84 15.00 0.41 0.58
7 A' 1546 1445 6.86 20.32 0.71 0.83
8 A' 1455 1360 0.19 10.78 0.65 0.79
9 A' 1245 1164 1.41 3.89 0.33 0.50
10 A' 1129 1055 5.99 1.64 0.20 0.33
11 A' 1110 1037 31.02 0.11 0.26 0.42
12 A' 1012 946 3.80 9.07 0.43 0.60
13 A' 978 914 10.79 8.54 0.59 0.74
14 A' 699 653 0.14 14.37 0.59 0.74
15 A' 331 310 1.33 1.30 0.73 0.84
16 A" 3221 3009 47.07 78.59 0.75 0.86
17 A" 3212 3001 17.47 74.60 0.75 0.86
18 A" 1540 1439 6.33 16.94 0.75 0.86
19 A" 1159 1083 1.36 2.47 0.75 0.86
20 A" 1076 1005 0.22 3.90 0.75 0.86
21 A" 1026 959 2.20 11.78 0.75 0.86
22 A" 703 657 27.07 1.03 0.75 0.86
23 A" 290 271 10.27 1.11 0.75 0.86
24 A" 155 145 0.52 0.33 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 19113.8 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 17859.9 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/6-31G**
ABC
0.69329 0.21204 0.17310

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.179 0.000
C2 -0.057 -1.324 0.000
C3 1.153 -0.429 0.000
C4 -0.828 1.400 0.000
H5 -0.337 -1.851 0.909
H6 -0.337 -1.851 -0.909
H7 2.226 -0.392 0.000
H8 -0.209 2.295 0.000
H9 -1.473 1.420 -0.877
H10 -1.473 1.420 0.877

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50481.30311.47522.25022.25022.29782.12572.11662.1166
C21.50481.50512.83161.08721.08722.46553.62233.21063.2106
C31.30311.50512.69592.25142.25141.07363.04503.32913.3291
C41.47522.83162.69593.41193.41193.54091.08751.08931.0893
H52.25021.08722.25143.41191.81743.08564.24653.89683.4635
H62.25021.08722.25143.41191.81743.08564.24653.46353.8968
H72.29782.46551.07363.54093.08563.08563.62634.21144.2114
H82.12573.62233.04501.08754.24654.24653.62631.76971.7697
H92.11663.21063.32911.08933.89683.46354.21141.76971.7549
H102.11663.21063.32911.08933.46353.89684.21141.76971.7549

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 51.307 H1 C2 C6 119.621
C2 C3 C6 24.800 C2 C3 C10 72.339
C2 C6 C3 35.501 C2 C6 H4 49.635
C2 C6 H5 33.297 C3 C2 C6 119.699
C3 C6 H4 52.079 C3 C6 H5 66.196
C3 C10 H7 9.369 C3 C10 H8 65.200
C3 C10 H9 74.718 H4 C6 H5 74.554
C6 C3 C10 86.303 H7 C10 H8 58.818
H7 C10 H9 77.974 H8 C10 H9 60.275
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability