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

using model chemistry: MP2=FULL/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-155.457537
Energy at 298.15K 
HF Energy-154.880527
Nuclear repulsion energy108.176577
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/6-31+G**
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' 3360 3156 0.19 127.43 0.30 0.46
2 A' 3222 3026 14.98 79.50 0.73 0.84
3 A' 3138 2947 64.74 118.62 0.16 0.28
4 A' 3114 2925 24.82 186.81 0.01 0.02
5 A' 1861 1748 12.18 32.21 0.11 0.19
6 A' 1579 1483 7.70 10.79 0.49 0.66
7 A' 1532 1439 9.08 13.22 0.62 0.76
8 A' 1446 1358 0.05 6.73 0.75 0.86
9 A' 1228 1153 3.17 10.28 0.24 0.39
10 A' 1113 1045 1.19 5.10 0.11 0.20
11 A' 1096 1029 41.10 2.76 0.12 0.21
12 A' 1004 943 5.02 9.99 0.19 0.32
13 A' 965 906 14.27 5.83 0.36 0.53
14 A' 688 646 0.57 12.95 0.62 0.77
15 A' 330 310 1.62 1.39 0.74 0.85
16 A" 3216 3021 39.68 97.71 0.75 0.86
17 A" 3200 3006 15.09 77.95 0.75 0.86
18 A" 1523 1430 8.51 9.00 0.75 0.86
19 A" 1151 1081 1.34 0.52 0.75 0.86
20 A" 1062 997 0.00 0.79 0.75 0.86
21 A" 1006 945 1.95 4.10 0.75 0.86
22 A" 673 632 39.88 1.13 0.75 0.86
23 A" 275 258 16.50 0.33 0.75 0.86
24 A" 154 144 0.68 0.24 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18967.7 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 17814.4 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/6-31+G**
ABC
0.68971 0.21176 0.17273

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.179 0.000
C2 -0.063 -1.327 0.000
C3 1.154 -0.430 0.000
C4 -0.825 1.404 0.000
H5 -0.341 -1.851 0.911
H6 -0.341 -1.851 -0.911
H7 2.227 -0.397 0.000
H8 -0.202 2.296 0.000
H9 -1.470 1.424 -0.878
H10 -1.470 1.424 0.878

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50771.30481.47632.25152.25152.30092.12582.11662.1166
C21.50771.51112.83511.08721.08722.47153.62533.21223.2122
C31.30481.51112.69782.25452.25451.07433.04433.33033.3303
C41.47632.83512.69783.41433.41433.54411.08821.08991.0899
H52.25151.08722.25453.41431.82173.08874.24803.89873.4640
H62.25151.08722.25453.41431.82173.08874.24803.46403.8987
H72.30092.47151.07433.54413.08873.08873.62674.21404.2140
H82.12583.62533.04431.08824.24804.24803.62671.77211.7721
H92.11663.21223.33031.08993.89873.46404.21401.77211.7568
H102.11663.21223.33031.08993.46403.89874.21401.77211.7568

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 51.218 H1 C2 C6 119.495
C2 C3 C6 24.819 C2 C3 C10 72.321
C2 C6 C3 35.690 C2 C6 H4 49.698
C2 C6 H5 33.090 C3 C2 C6 119.491
C3 C6 H4 52.075 C3 C6 H5 66.170
C3 C10 H7 9.355 C3 C10 H8 65.131
C3 C10 H9 74.707 H4 C6 H5 74.528
C6 C3 C10 86.282 H7 C10 H8 58.765
H7 C10 H9 77.968 H8 C10 H9 60.284
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability