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

using model chemistry: HF/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 HF/6-31G*
 hartrees
Energy at 0K-154.868052
Energy at 298.15K 
HF Energy-154.868052
Nuclear repulsion energy108.905795
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 HF/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' 3478 3125 0.01 91.06 0.30 0.46
2 A' 3285 2951 27.47 88.26 0.73 0.84
3 A' 3206 2881 50.79 239.42 0.04 0.08
4 A' 3204 2879 77.34 43.30 0.27 0.43
5 A' 2023 1818 15.48 54.45 0.22 0.37
6 A' 1676 1506 10.73 13.62 0.39 0.56
7 A' 1627 1461 6.37 21.72 0.71 0.83
8 A' 1556 1398 0.95 8.84 0.69 0.81
9 A' 1307 1174 3.57 5.18 0.51 0.68
10 A' 1206 1084 16.57 2.95 0.19 0.32
11 A' 1195 1074 26.96 0.14 0.50 0.66
12 A' 1064 956 3.64 11.69 0.48 0.65
13 A' 1040 934 17.10 10.78 0.47 0.64
14 A' 740 665 0.20 17.35 0.55 0.71
15 A' 350 314 1.35 1.10 0.70 0.82
16 A" 3262 2931 12.96 86.57 0.75 0.86
17 A" 3258 2927 95.55 99.87 0.75 0.86
18 A" 1623 1459 6.08 17.95 0.75 0.86
19 A" 1229 1105 2.81 2.20 0.75 0.86
20 A" 1160 1043 1.27 5.34 0.75 0.86
21 A" 1080 970 1.42 12.45 0.75 0.86
22 A" 839 754 38.57 1.54 0.75 0.86
23 A" 333 299 11.05 2.09 0.75 0.86
24 A" 161 144 0.32 0.32 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 19951.4 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 17926.3 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 HF/6-31G*
ABC
0.70266 0.21350 0.17455

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.172 0.000
C2 0.001 -1.324 0.000
C3 1.155 -0.374 0.000
C4 -0.881 1.364 0.000
H5 -0.258 -1.866 0.903
H6 -0.258 -1.866 -0.903
H7 2.220 -0.293 0.000
H8 -0.302 2.280 0.000
H9 -1.524 1.358 -0.875
H10 -1.524 1.358 0.875

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.49621.27701.48232.24412.24412.26802.12952.11982.1198
C21.49621.49492.82921.08441.08442.44673.61683.20673.2067
C31.27701.49492.67652.24462.24461.06823.02703.30713.3071
C41.48232.82922.67653.41143.41143.51601.08381.08561.0856
H52.24411.08442.24463.41141.80573.07074.24353.89313.4636
H62.24411.08442.24463.41141.80573.07074.24353.46363.8931
H72.26802.44671.06823.51603.07073.07073.60284.18404.1840
H82.12953.61683.02701.08384.24354.24353.60281.76331.7633
H92.11983.20673.30711.08563.89313.46364.18401.76331.7499
H102.11983.20673.30711.08563.46363.89314.18401.76331.7499

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 50.548 H1 C2 C6 119.979
C2 C3 C6 24.696 C2 C3 C10 73.012
C2 C6 C3 35.166 C2 C6 H4 49.458
C2 C6 H5 33.636 C3 C2 C6 120.138
C3 C6 H4 51.602 C3 C6 H5 66.283
C3 C10 H7 9.408 C3 C10 H8 65.246
C3 C10 H9 74.659 H4 C6 H5 74.653
C6 C3 C10 86.838 H7 C10 H8 58.839
H7 C10 H9 77.929 H8 C10 H9 60.250
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.089      
2 C -0.355      
3 C -0.244      
4 C -0.537      
5 H 0.144      
6 H 0.144      
7 H 0.201      
8 H 0.184      
9 H 0.187      
10 H 0.187      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.097 0.882 0.000 0.887
CHELPG 0.820 0.348 0.000 0.890
AIM        
ESP 0.848 0.338 0.001 0.913


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.377 -0.483 0.000
y -0.483 -25.304 0.000
z 0.000 0.000 -25.688
Traceless
 xyz
x 2.119 -0.483 0.000
y -0.483 -0.772 0.000
z 0.000 0.000 -1.348
Polar
3z2-r2-2.695
x2-y21.927
xy-0.483
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.298 -0.411 0.000
y -0.411 6.458 0.000
z 0.000 0.000 4.081


<r2> (average value of r2) Å2
<r2> 79.733
(<r2>)1/2 8.929