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: PBE1PBE/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 PBE1PBE/6-31G**
 hartrees
Energy at 0K-155.749415
Energy at 298.15K 
HF Energy-155.749415
Nuclear repulsion energy108.336835
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/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3315 3160 0.11 107.40 0.30 0.46
2 A' 3158 3010 14.97 85.51 0.73 0.84
3 A' 3063 2920 17.50 252.72 0.01 0.01
4 A' 3061 2917 84.18 51.95 0.56 0.72
5 A' 1906 1816 10.91 52.60 0.21 0.35
6 A' 1556 1483 8.74 16.38 0.39 0.56
7 A' 1508 1437 9.73 23.36 0.69 0.82
8 A' 1428 1361 0.21 17.38 0.60 0.75
9 A' 1233 1175 1.13 4.99 0.46 0.63
10 A' 1117 1065 18.07 2.15 0.30 0.46
11 A' 1090 1038 23.87 0.18 0.70 0.83
12 A' 1003 956 7.61 9.56 0.50 0.67
13 A' 958 913 13.79 8.30 0.63 0.78
14 A' 707 674 0.59 16.06 0.58 0.74
15 A' 324 309 1.88 1.31 0.74 0.85
16 A" 3128 2981 5.73 88.04 0.75 0.86
17 A" 3120 2973 68.08 96.87 0.75 0.86
18 A" 1503 1433 8.71 17.83 0.75 0.86
19 A" 1142 1088 0.47 2.63 0.75 0.86
20 A" 1065 1015 1.20 5.40 0.75 0.86
21 A" 1001 954 3.22 11.42 0.75 0.86
22 A" 735 701 29.46 1.13 0.75 0.86
23 A" 301 287 11.01 1.23 0.75 0.86
24 A" 160 152 0.51 0.36 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18790.2 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 17908.9 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/6-31G**
ABC
0.69369 0.21247 0.17351

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.180 0.000
C2 -0.034 -1.323 0.000
C3 1.155 -0.409 0.000
C4 -0.847 1.384 0.000
H5 -0.312 -1.863 0.913
H6 -0.312 -1.863 -0.913
H7 2.233 -0.356 0.000
H8 -0.248 2.300 0.000
H9 -1.502 1.394 -0.880
H10 -1.502 1.394 0.880

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50361.29601.47252.25882.25882.29692.13502.12242.1224
C21.50361.49992.82711.09621.09622.46523.63013.21153.2115
C31.29601.49992.68732.25782.25781.08013.05083.32883.3288
C41.47252.82712.68733.41503.41503.53821.09441.09711.0971
H52.25881.09622.25783.41501.82623.09534.26233.90363.4674
H62.25881.09622.25783.41501.82623.09534.26233.46743.9036
H72.29692.46521.08013.53823.09533.09533.63544.21774.2177
H82.13503.63013.05081.09444.26234.26233.63541.77961.7796
H92.12243.21153.32881.09713.90363.46744.21771.77961.7607
H102.12243.21153.32881.09713.46743.90364.21771.77961.7607

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 51.124 H1 C2 C6 119.833
C2 C3 C6 24.850 C2 C3 C10 72.415
C2 C6 C3 35.102 C2 C6 H4 49.409
C2 C6 H5 33.591 C3 C2 C6 120.048
C3 C6 H4 51.791 C3 C6 H5 66.145
C3 C10 H7 9.391 C3 C10 H8 65.354
C3 C10 H9 74.664 H4 C6 H5 74.491
C6 C3 C10 86.414 H7 C10 H8 58.963
H7 C10 H9 77.952 H8 C10 H9 60.349
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.157      
2 C -0.394      
3 C -0.208      
4 C -0.619      
5 H 0.152      
6 H 0.152      
7 H 0.169      
8 H 0.194      
9 H 0.198      
10 H 0.198      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.147 0.898 0.000 0.910
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.017 -0.587 0.000
y -0.587 -24.743 0.000
z 0.000 0.000 -25.184
Traceless
 xyz
x 1.946 -0.587 0.000
y -0.587 -0.643 0.000
z 0.000 0.000 -1.304
Polar
3z2-r2-2.607
x2-y21.726
xy-0.587
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.470 -0.511 0.000
y -0.511 6.794 0.000
z 0.000 0.000 4.186


<r2> (average value of r2) Å2
<r2> 79.914
(<r2>)1/2 8.939