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

using model chemistry: MP2/cc-pVQZ

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/cc-pVQZ
 hartrees
Energy at 0K-155.633849
Energy at 298.15K 
HF Energy-154.932543
Nuclear repulsion energy108.489569
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/cc-pVQZ
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' 3315 3144 0.69 121.97 0.28 0.43
2 A' 3175 3011 10.53 72.37 0.72 0.84
3 A' 3096 2936 60.31 148.88 0.12 0.22
4 A' 3072 2914 18.01 220.61 0.01 0.02
5 A' 1837 1742 11.09 36.67 0.13 0.23
6 A' 1534 1455 4.25 9.85 0.36 0.53
7 A' 1497 1420 9.50 9.79 0.58 0.73
8 A' 1408 1335 0.16 3.55 0.59 0.74
9 A' 1202 1140 3.54 7.85 0.33 0.50
10 A' 1089 1033 2.04 5.08 0.08 0.15
11 A' 1059 1004 31.86 1.72 0.29 0.45
12 A' 991 940 6.29 8.41 0.18 0.31
13 A' 948 899 14.21 4.44 0.40 0.58
14 A' 683 647 0.56 13.30 0.57 0.73
15 A' 321 304 1.69 1.59 0.75 0.86
16 A" 3174 3011 32.57 94.01 0.75 0.86
17 A" 3151 2989 9.67 71.05 0.75 0.86
18 A" 1494 1417 8.42 5.89 0.75 0.86
19 A" 1127 1069 1.24 0.71 0.75 0.86
20 A" 1052 998 0.08 1.70 0.75 0.86
21 A" 999 947 2.36 2.03 0.75 0.86
22 A" 722 685 30.09 0.52 0.75 0.86
23 A" 288 274 12.37 0.33 0.75 0.86
24 A" 163 155 0.37 0.24 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18698.0 cm-1
Scaled (by 0.9484) Zero Point Vibrational Energy (zpe) 17733.2 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/cc-pVQZ
ABC
0.69298 0.21315 0.17385

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.180 0.000
C2 -0.049 -1.325 0.000
C3 1.153 -0.415 0.000
C4 -0.836 1.390 0.000
H5 -0.320 -1.848 0.912
H6 -0.320 -1.848 -0.912
H7 2.225 -0.373 0.000
H8 -0.227 2.290 0.000
H9 -1.482 1.401 -0.876
H10 -1.482 1.401 0.876

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50581.29711.47132.24622.24622.29242.12302.11072.1107
C21.50581.50782.82741.08531.08532.46543.62023.20203.2020
C31.29711.50782.68592.24812.24811.07293.03703.31753.3175
C41.47132.82742.68593.40373.40373.53231.08671.08881.0888
H52.24621.08532.24813.40371.82373.07944.23883.88633.4505
H62.24621.08532.24813.40371.82373.07944.23883.45053.8863
H72.29242.46541.07293.53233.07943.07943.62024.20154.2015
H82.12303.62023.03701.08674.23884.23883.62021.77021.7702
H92.11073.20203.31751.08883.88633.45054.20151.77021.7530
H102.11073.20203.31751.08883.45053.88634.20151.77021.7530

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 50.986 H1 C2 C6 119.305
C2 C3 C6 24.895 C2 C3 C10 72.390
C2 C6 C3 35.790 C2 C6 H4 49.801
C2 C6 H5 32.843 C3 C2 C6 119.315
C3 C6 H4 51.986 C3 C6 H5 66.071
C3 C10 H7 9.340 C3 C10 H8 65.257
C3 C10 H9 74.680 H4 C6 H5 74.461
C6 C3 C10 86.323 H7 C10 H8 58.913
H7 C10 H9 77.959 H8 C10 H9 60.321
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability