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

using model chemistry: BLYP/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 BLYP/6-31G**
 hartrees
Energy at 0K-155.863387
Energy at 298.15K 
HF Energy-155.863387
Nuclear repulsion energy107.228636
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 BLYP/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' 3189 3165 1.72 128.09 0.30 0.46
2 A' 3034 3010 22.30 91.43 0.72 0.84
3 A' 2953 2931 21.15 254.61 0.01 0.01
4 A' 2949 2926 93.42 71.94 0.37 0.54
5 A' 1808 1794 10.72 50.51 0.20 0.34
6 A' 1502 1490 10.78 19.25 0.38 0.56
7 A' 1458 1447 7.45 25.67 0.69 0.82
8 A' 1379 1369 1.10 24.74 0.55 0.71
9 A' 1156 1147 0.82 4.03 0.33 0.49
10 A' 1056 1048 8.51 0.93 0.32 0.49
11 A' 1034 1026 30.71 0.11 0.74 0.85
12 A' 947 940 1.38 9.88 0.52 0.68
13 A' 920 912 10.78 11.34 0.64 0.78
14 A' 651 646 0.08 17.53 0.59 0.74
15 A' 311 308 1.51 1.82 0.74 0.85
16 A" 3005 2982 53.94 97.48 0.75 0.86
17 A" 3002 2978 33.73 95.62 0.75 0.86
18 A" 1453 1442 5.72 19.19 0.75 0.86
19 A" 1096 1087 0.53 2.94 0.75 0.86
20 A" 1022 1014 1.05 3.96 0.75 0.86
21 A" 965 957 2.50 13.40 0.75 0.86
22 A" 699 694 21.70 1.36 0.75 0.86
23 A" 289 287 8.37 1.15 0.75 0.86
24 A" 159 158 0.46 0.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18018.1 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 17879.4 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 BLYP/6-31G**
ABC
0.67881 0.20805 0.16976

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.183 0.000
C2 -0.039 -1.343 0.000
C3 1.165 -0.413 0.000
C4 -0.850 1.402 0.000
H5 -0.318 -1.885 0.919
H6 -0.318 -1.885 -0.919
H7 2.250 -0.356 0.000
H8 -0.246 2.322 0.000
H9 -1.510 1.417 -0.885
H10 -1.510 1.417 0.885

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.52601.30821.48632.28452.28452.31322.15382.14202.1420
C21.52601.52102.86201.10251.10252.49223.67103.25043.2504
C31.30821.52102.71182.28212.28211.08643.07763.35983.3598
C41.48632.86202.71183.45373.45373.56361.10151.10421.1042
H52.28451.10252.28213.45371.83743.12624.30693.94673.5106
H62.28451.10252.28213.45371.83743.12624.30693.51063.9467
H72.31322.49221.08643.56363.12623.12623.66064.25024.2502
H82.15383.67103.07761.10154.30694.30693.66061.78971.7897
H92.14203.25043.35981.10423.94673.51064.25021.78971.7701
H102.14203.25043.35981.10423.51063.94674.25021.78971.7701

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 50.853 H1 C2 C6 119.855
C2 C3 C6 24.720 C2 C3 C10 72.714
C2 C6 C3 35.233 C2 C6 H4 49.431
C2 C6 H5 33.560 C3 C2 C6 120.047
C3 C6 H4 51.642 C3 C6 H5 66.261
C3 C10 H7 9.448 C3 C10 H8 65.329
C3 C10 H9 74.727 H4 C6 H5 74.573
C6 C3 C10 86.561 H7 C10 H8 58.859
H7 C10 H9 77.981 H8 C10 H9 60.360
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.157      
2 C -0.228      
3 C -0.115      
4 C -0.367      
5 H 0.072      
6 H 0.072      
7 H 0.066      
8 H 0.111      
9 H 0.116      
10 H 0.116      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.170 0.912 0.000 0.928
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.421 -0.590 0.000
y -0.590 -24.959 0.000
z 0.000 0.000 -25.275
Traceless
 xyz
x 1.696 -0.590 0.000
y -0.590 -0.611 0.000
z 0.000 0.000 -1.085
Polar
3z2-r2-2.170
x2-y21.538
xy-0.590
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.746 -0.572 0.000
y -0.572 7.147 0.000
z 0.000 0.000 4.321


<r2> (average value of r2) Å2
<r2> 81.434
(<r2>)1/2 9.024