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: PBEPBE/daug-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 PBEPBE/daug-cc-pVTZ
 hartrees
Energy at 0K-155.784414
Energy at 298.15K 
HF Energy-155.784414
Nuclear repulsion energy107.947163
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 PBEPBE/daug-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' 3188 3188 0.37 140.17 0.29 0.45
2 A' 3037 3037 15.75 93.76 0.69 0.82
3 A' 2954 2954 42.11 405.16 0.02 0.03
4 A' 2952 2952 68.94 78.54 0.35 0.52
5 A' 1810 1810 15.02 83.31 0.12 0.21
6 A' 1469 1469 5.41 11.74 0.29 0.45
7 A' 1425 1425 11.31 12.42 0.48 0.65
8 A' 1347 1347 0.58 11.62 0.45 0.62
9 A' 1159 1159 1.63 9.08 0.41 0.58
10 A' 1046 1046 5.79 4.94 0.13 0.23
11 A' 1024 1024 30.36 1.84 0.46 0.63
12 A' 954 954 6.56 6.70 0.20 0.33
13 A' 909 909 14.00 3.78 0.55 0.71
14 A' 665 665 0.77 14.65 0.58 0.73
15 A' 315 315 1.91 2.16 0.75 0.86
16 A" 3012 3012 40.49 129.81 0.75 0.86
17 A" 3005 3005 21.37 100.72 0.75 0.86
18 A" 1420 1420 8.66 5.85 0.75 0.86
19 A" 1083 1083 1.14 0.59 0.75 0.86
20 A" 1012 1012 0.13 1.78 0.75 0.86
21 A" 954 954 2.70 0.58 0.75 0.86
22 A" 697 697 31.42 1.19 0.75 0.86
23 A" 291 291 12.77 0.14 0.75 0.86
24 A" 161 161 0.43 0.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17944.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 17944.6 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 PBEPBE/daug-cc-pVTZ
ABC
0.68525 0.21160 0.17251

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.181 0.000
C2 -0.045 -1.331 0.000
C3 1.157 -0.412 0.000
C4 -0.840 1.391 0.000
H5 -0.321 -1.864 0.920
H6 -0.321 -1.864 -0.920
H7 2.240 -0.364 0.000
H8 -0.234 2.307 0.000
H9 -1.498 1.403 -0.883
H10 -1.498 1.403 0.883

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.51231.30031.47332.26542.26542.30522.13902.12552.1255
C21.51231.51252.83581.09851.09852.48053.64283.21963.2196
C31.30031.51252.69112.26682.26681.08383.05463.33553.3355
C41.47332.83582.69113.42263.42263.54521.09841.10121.1012
H52.26541.09852.26683.42261.83933.10684.27263.91303.4733
H62.26541.09852.26683.42261.83933.10684.27263.47333.9130
H72.30522.48051.08383.54523.10683.10683.64104.22804.2280
H82.13903.64283.05461.09844.27264.27263.64101.78761.7876
H92.12553.21963.33551.10123.91303.47334.22801.78761.7658
H102.12553.21963.33551.10123.47333.91304.22801.78761.7658

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 50.918 H1 C2 C6 119.538
C2 C3 C6 24.909 C2 C3 C10 72.418
C2 C6 C3 35.444 C2 C6 H4 49.543
C2 C6 H5 33.157 C3 C2 C6 119.647
C3 C6 H4 51.728 C3 C6 H5 66.064
C3 C10 H7 9.391 C3 C10 H8 65.259
C3 C10 H9 74.651 H4 C6 H5 74.413
C6 C3 C10 86.387 H7 C10 H8 58.867
H7 C10 H9 77.947 H8 C10 H9 60.403
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 1.287      
2 C -1.062      
3 C -1.392      
4 C 0.323      
5 H -0.051      
6 H -0.051      
7 H 0.306      
8 H 0.205      
9 H 0.218      
10 H 0.218      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.194 0.918 0.000 0.938
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.911 -0.711 0.000
y -0.711 -25.535 0.000
z 0.000 0.000 -25.929
Traceless
 xyz
x 1.821 -0.711 0.000
y -0.711 -0.615 0.000
z 0.000 0.000 -1.205
Polar
3z2-r2-2.411
x2-y21.624
xy-0.711
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.097 -0.660 0.000
y -0.660 8.576 0.000
z 0.000 0.000 5.911


<r2> (average value of r2) Å2
<r2> 80.789
(<r2>)1/2 8.988