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: CCD/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 CCD/6-31G
 hartrees
Energy at 0K-155.195175
Energy at 298.15K 
HF Energy-154.791975
Nuclear repulsion energy106.539372
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 CCD/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' 3285 3152 0.67      
2 A' 3092 2967 22.16      
3 A' 3081 2956 45.39      
4 A' 3012 2890 26.94      
5 A' 1838 1764 7.27      
6 A' 1577 1513 4.79      
7 A' 1547 1484 7.08      
8 A' 1474 1414 0.61      
9 A' 1219 1170 4.83      
10 A' 1141 1095 10.01      
11 A' 1113 1068 31.77      
12 A' 988 948 0.02      
13 A' 950 912 10.57      
14 A' 651 625 0.33      
15 A' 336 322 1.29      
16 A" 3152 3025 53.51      
17 A" 3074 2950 21.36      
18 A" 1535 1473 7.39      
19 A" 1142 1096 0.74      
20 A" 1076 1032 0.66      
21 A" 1018 976 1.34      
22 A" 679 652 39.48      
23 A" 274 263 12.57      
24 A" 132 126 0.48      

Unscaled Zero Point Vibrational Energy (zpe) 18691.7 cm-1
Scaled (by 0.9595) Zero Point Vibrational Energy (zpe) 17934.7 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 CCD/6-31G
ABC
0.66631 0.20553 0.16735

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.179 0.000
C2 -0.118 -1.361 0.000
C3 1.148 -0.468 0.000
C4 -0.774 1.458 0.000
H5 -0.412 -1.881 0.918
H6 -0.412 -1.881 -0.918
H7 2.230 -0.453 0.000
H8 -0.096 2.326 0.000
H9 -1.423 1.522 -0.890
H10 -1.423 1.522 0.890

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.54441.31781.49432.29312.29312.31792.14942.14932.1493
C21.54441.54832.89361.09551.09552.51733.68733.28703.2870
C31.31781.54832.72062.29612.29611.08263.05913.37073.3707
C41.49432.89362.72063.48153.48153.55981.10231.10371.1037
H52.29311.09552.29613.48151.83553.14114.31833.98363.5499
H62.29311.09552.29613.48151.83553.14114.31833.54993.9836
H72.31792.51731.08263.55983.14113.14113.62394.24694.2469
H82.14943.68733.05911.10234.31834.31833.62391.78951.7895
H92.14933.28703.37071.10373.98363.54994.24691.78951.7804
H102.14933.28703.37071.10373.54993.98364.24691.78951.7804

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 50.441 H1 C2 C6 119.623
C2 C3 C6 24.513 C2 C3 C10 73.556
C2 C6 C3 35.901 C2 C6 H4 49.563
C2 C6 H5 33.097 C3 C2 C6 119.586
C3 C6 H4 51.324 C3 C6 H5 66.441
C3 C10 H7 9.641 C3 C10 H8 64.434
C3 C10 H9 74.687 H4 C6 H5 74.715
C6 C3 C10 87.169 H7 C10 H8 57.773
H7 C10 H9 77.901 H8 C10 H9 60.169
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability