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

using model chemistry: MP2/cc-pVTZ

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-pVTZ
 hartrees
Energy at 0K-155.583469
Energy at 298.15K 
HF Energy-154.922375
Nuclear repulsion energy108.306524
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-pVTZ
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 3148 0.55 119.26 0.31 0.47
2 A' 3171 3011 11.34 74.99 0.73 0.84
3 A' 3095 2938 61.31 145.70 0.13 0.23
4 A' 3071 2916 18.68 202.14 0.01 0.02
5 A' 1834 1741 10.41 31.86 0.16 0.28
6 A' 1537 1460 5.00 11.18 0.36 0.53
7 A' 1499 1423 8.97 11.34 0.62 0.77
8 A' 1408 1337 0.10 4.19 0.63 0.77
9 A' 1203 1143 3.14 7.05 0.36 0.53
10 A' 1091 1036 2.35 3.83 0.12 0.21
11 A' 1064 1010 33.46 1.05 0.30 0.46
12 A' 992 942 5.50 8.33 0.25 0.40
13 A' 950 902 13.71 5.01 0.43 0.60
14 A' 683 648 0.49 13.59 0.58 0.73
15 A' 321 305 1.65 1.55 0.74 0.85
16 A" 3172 3012 35.98 90.13 0.75 0.86
17 A" 3147 2989 10.83 73.24 0.75 0.86
18 A" 1495 1420 8.06 7.46 0.75 0.86
19 A" 1128 1071 1.26 1.33 0.75 0.86
20 A" 1053 1000 0.10 2.21 0.75 0.86
21 A" 1001 950 2.38 3.48 0.75 0.86
22 A" 719 683 29.32 0.54 0.75 0.86
23 A" 290 276 12.02 0.55 0.75 0.86
24 A" 163 154 0.34 0.29 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18700.2 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 17755.8 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 MP2/cc-pVTZ
ABC
0.69113 0.21234 0.17321

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.180 0.000
C2 -0.052 -1.327 0.000
C3 1.154 -0.419 0.000
C4 -0.834 1.395 0.000
H5 -0.325 -1.851 0.912
H6 -0.325 -1.851 -0.912
H7 2.227 -0.380 0.000
H8 -0.222 2.295 0.000
H9 -1.481 1.408 -0.877
H10 -1.481 1.408 0.877

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50841.30041.47372.24982.24982.29642.12632.11422.1142
C21.50841.51002.83251.08641.08642.46823.62613.20813.2081
C31.30041.51002.69152.25142.25141.07363.04303.32413.3241
C41.47372.83252.69153.40973.40973.53861.08791.09001.0900
H52.24981.08642.25143.40971.82443.08324.24583.89323.4577
H62.24981.08642.25143.40971.82443.08324.24583.45773.8932
H72.29642.46821.07363.53863.08323.08323.62704.20884.2088
H82.12633.62613.04301.08794.24584.24583.62701.77191.7719
H92.11423.20813.32411.09003.89323.45774.20881.77191.7548
H102.11423.20813.32411.09003.45773.89324.20881.77191.7548

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 51.039 H1 C2 C6 119.346
C2 C3 C6 24.873 C2 C3 C10 72.384
C2 C6 C3 35.776 C2 C6 H4 49.783
C2 C6 H5 32.896 C3 C2 C6 119.352
C3 C6 H4 52.007 C3 C6 H5 66.098
C3 C10 H7 9.328 C3 C10 H8 65.262
C3 C10 H9 74.695 H4 C6 H5 74.483
C6 C3 C10 86.316 H7 C10 H8 58.925
H7 C10 H9 77.967 H8 C10 H9 60.318
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability