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

using model chemistry: TPSSh/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 TPSSh/3-21G*
 hartrees
Energy at 0K-155.092208
Energy at 298.15K 
HF Energy-155.092208
Nuclear repulsion energy107.331316
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 TPSSh/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' 3305 3192 0.07 98.62 0.29 0.45
2 A' 3113 3006 17.43 85.59 0.72 0.83
3 A' 3074 2968 55.13 118.94 0.14 0.25
4 A' 3031 2928 21.10 157.63 0.02 0.04
5 A' 1820 1758 9.07 39.27 0.21 0.35
6 A' 1559 1505 6.74 15.75 0.43 0.60
7 A' 1550 1497 10.33 30.67 0.70 0.83
8 A' 1459 1409 1.25 24.48 0.54 0.70
9 A' 1182 1142 4.71 2.75 0.38 0.55
10 A' 1096 1058 3.95 1.62 0.34 0.51
11 A' 1071 1035 55.54 0.61 0.55 0.71
12 A' 966 933 1.03 8.66 0.67 0.81
13 A' 934 902 9.18 12.23 0.44 0.61
14 A' 640 618 0.22 15.82 0.60 0.75
15 A' 319 308 2.36 1.60 0.72 0.84
16 A" 3149 3041 51.16 84.38 0.75 0.86
17 A" 3081 2975 14.15 89.88 0.75 0.86
18 A" 1548 1495 8.75 22.60 0.75 0.86
19 A" 1130 1091 0.00 2.64 0.75 0.86
20 A" 1075 1039 3.53 5.60 0.75 0.86
21 A" 1013 979 3.59 14.60 0.75 0.86
22 A" 768 742 41.64 1.33 0.75 0.86
23 A" 307 296 16.02 1.55 0.75 0.86
24 A" 147 142 0.45 0.38 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18668.2 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 18027.9 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 TPSSh/3-21G*
ABC
0.67541 0.20889 0.17013

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.183 0.000
C2 -0.080 -1.353 0.000
C3 1.151 -0.435 0.000
C4 -0.808 1.424 0.000
H5 -0.359 -1.867 0.920
H6 -0.359 -1.867 -0.920
H7 2.224 -0.396 0.000
H8 -0.167 2.313 0.000
H9 -1.459 1.452 -0.885
H10 -1.459 1.452 0.885

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.53801.30661.48032.27582.27582.29822.13672.12652.1265
C21.53801.53612.87011.09051.09052.49503.66703.24843.2484
C31.30661.53612.70032.27582.27581.07353.04803.34013.3401
C41.48032.87012.70033.44643.44643.53601.09611.09911.0991
H52.27581.09052.27583.44641.84053.11174.28483.93543.4970
H62.27581.09052.27583.44641.84053.11174.28483.49703.9354
H72.29822.49501.07353.53603.11173.11173.61384.21464.2146
H82.13673.66703.04801.09614.28484.28483.61381.78671.7867
H92.12653.24843.34011.09913.93543.49704.21461.78671.7701
H102.12653.24843.34011.09913.49703.93544.21461.78671.7701

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 50.306 H1 C2 C6 118.973
C2 C3 C6 24.743 C2 C3 C10 73.210
C2 C6 C3 36.127 C2 C6 H4 50.024
C2 C6 H5 32.444 C3 C2 C6 119.130
C3 C6 H4 51.499 C3 C6 H5 66.149
C3 C10 H7 9.519 C3 C10 H8 64.925
C3 C10 H9 74.634 H4 C6 H5 74.513
C6 C3 C10 86.801 H7 C10 H8 58.382
H7 C10 H9 77.878 H8 C10 H9 60.305
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.007      
2 C -0.368      
3 C -0.189      
4 C -0.723      
5 H 0.197      
6 H 0.197      
7 H 0.195      
8 H 0.223      
9 H 0.231      
10 H 0.231      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.177 0.858 0.000 0.876
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.149 -0.482 0.000
y -0.482 6.612 0.000
z 0.000 0.000 3.815


<r2> (average value of r2) Å2
<r2> 81.190
(<r2>)1/2 9.011