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

using model chemistry: PBE1PBE/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at PBE1PBE/3-21G*
 hartrees
Energy at 0K-154.883305
Energy at 298.15K 
HF Energy-154.883305
Nuclear repulsion energy107.807115
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 PBE1PBE/3-21G*
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' 3343 3209 0.81 86.96 0.29 0.44
2 A' 3148 3021 10.76 79.54 0.72 0.84
3 A' 3102 2977 44.31 110.29 0.14 0.25
4 A' 3056 2933 14.91 153.15 0.02 0.04
5 A' 1859 1785 8.49 42.47 0.21 0.35
6 A' 1560 1498 4.15 14.95 0.44 0.61
7 A' 1543 1481 12.29 29.20 0.71 0.83
8 A' 1458 1400 4.14 22.39 0.56 0.72
9 A' 1201 1152 5.49 3.55 0.47 0.64
10 A' 1113 1069 10.49 1.25 0.35 0.51
11 A' 1085 1041 54.04 0.69 0.37 0.54
12 A' 987 948 0.12 8.52 0.58 0.73
13 A' 952 913 13.36 10.68 0.50 0.67
14 A' 660 633 0.49 15.25 0.61 0.76
15 A' 325 312 2.57 1.42 0.73 0.84
16 A" 3180 3052 41.28 78.42 0.75 0.86
17 A" 3115 2989 8.18 84.96 0.75 0.86
18 A" 1542 1480 11.35 21.76 0.75 0.86
19 A" 1138 1093 0.10 3.08 0.75 0.86
20 A" 1086 1042 4.53 6.20 0.75 0.86
21 A" 1019 978 4.45 13.20 0.75 0.86
22 A" 786 755 42.99 1.29 0.75 0.86
23 A" 314 301 16.86 1.54 0.75 0.86
24 A" 150 144 0.52 0.36 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18860.6 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 18102.4 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 PBE1PBE/3-21G*
ABC
0.68018 0.21123 0.17195

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.183 0.000
C2 -0.074 -1.343 0.000
C3 1.149 -0.428 0.000
C4 -0.810 1.411 0.000
H5 -0.353 -1.858 0.919
H6 -0.353 -1.858 -0.919
H7 2.221 -0.389 0.000
H8 -0.178 2.304 0.000
H9 -1.462 1.436 -0.884
H10 -1.462 1.436 0.884

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.52771.30151.47112.26612.26612.29312.12922.11872.1187
C21.52771.52782.85041.08981.08982.48563.64923.22973.2297
C31.30151.52782.68712.26872.26871.07233.03783.32783.3278
C41.47112.85042.68713.42633.42633.52481.09501.09821.0982
H52.26611.08982.26873.42631.83793.10314.26673.91563.4762
H62.26611.08982.26873.42631.83793.10314.26673.47623.9156
H72.29312.48561.07233.52483.10313.10313.60654.20384.2038
H82.12923.64923.03781.09504.26674.26673.60651.78421.7842
H92.11873.22973.32781.09823.91563.47624.20381.78421.7673
H102.11873.22973.32781.09823.47623.91564.20381.78421.7673

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 50.420 H1 C2 C6 118.986
C2 C3 C6 24.787 C2 C3 C10 72.974
C2 C6 C3 35.999 C2 C6 H4 49.983
C2 C6 H5 32.516 C3 C2 C6 119.213
C3 C6 H4 51.557 C3 C6 H5 66.106
C3 C10 H7 9.481 C3 C10 H8 64.945
C3 C10 H9 74.601 H4 C6 H5 74.442
C6 C3 C10 86.625 H7 C10 H8 58.451
H7 C10 H9 77.866 H8 C10 H9 60.314
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.008      
2 C -0.395      
3 C -0.194      
4 C -0.770      
5 H 0.208      
6 H 0.208      
7 H 0.207      
8 H 0.238      
9 H 0.246      
10 H 0.246      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.188 0.878 0.000 0.898
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.255 -0.561 0.000
y -0.561 -24.601 0.000
z 0.000 0.000 -25.783
Traceless
 xyz
x 1.937 -0.561 0.000
y -0.561 -0.082 0.000
z 0.000 0.000 -1.855
Polar
3z2-r2-3.710
x2-y21.346
xy-0.561
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.065 -0.472 0.000
y -0.472 6.458 0.000
z 0.000 0.000 3.774


<r2> (average value of r2) Å2
<r2> 80.522
(<r2>)1/2 8.973