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 (Methylenecyclopropane)

using model chemistry: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-155.932012
Energy at 298.15K-155.937790
Nuclear repulsion energy109.507987
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 mPW1PW91/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3174 3020 11.45      
2 A1 3150 2997 11.44      
3 A1 1881 1790 5.61      
4 A1 1502 1429 0.04      
5 A1 1457 1387 0.39      
6 A1 1099 1046 2.18      
7 A1 1053 1002 5.36      
8 A1 772 734 5.09      
9 A2 3226 3070 0.00      
10 A2 1180 1123 0.00      
11 A2 965 918 0.00      
12 A2 619 589 0.00      
13 B1 3238 3081 14.76      
14 B1 1106 1052 0.38      
15 B1 921 877 41.12      
16 B1 762 725 1.66      
17 B1 298 284 3.26      
18 B2 3263 3104 11.22      
19 B2 3149 2996 14.35      
20 B2 1463 1392 1.31      
21 B2 1158 1102 8.78      
22 B2 1084 1031 2.96      
23 B2 922 877 12.13      
24 B2 357 339 0.33      

Unscaled Zero Point Vibrational Energy (zpe) 18898.9 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 17982.3 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 mPW1PW91/6-31G**
ABC
0.65639 0.22977 0.18255

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.636
C2 0.000 0.000 0.316
H3 0.000 0.927 2.200
H4 0.000 -0.927 2.200
C5 0.000 0.766 -0.931
C6 0.000 -0.766 -0.931
H7 0.912 1.273 -1.234
H8 -0.912 1.273 -1.234
H9 -0.912 -1.273 -1.234
H10 0.912 -1.273 -1.234

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.31941.08531.08532.67872.67873.26953.26953.26953.2695
C21.31942.09952.09951.46371.46372.20382.20382.20382.2038
H31.08532.09951.85433.13543.55953.57023.57024.17944.1794
H41.08532.09951.85433.55953.13544.17944.17943.57023.5702
C52.67871.46373.13543.55951.53101.08671.08672.25372.2537
C62.67871.46373.55953.13541.53102.25372.25371.08671.0867
H73.26952.20383.57024.17941.08672.25371.82373.13192.5461
H83.26952.20383.57024.17941.08672.25371.82372.54613.1319
H93.26952.20384.17943.57022.25371.08673.13192.54611.8237
H103.26952.20384.17943.57022.25371.08672.54613.13191.8237

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.467 C1 C2 C6 148.467
C2 C1 H3 121.326 C2 C1 H4 121.326
C2 C5 C6 58.467 C2 C5 H7 118.817
C2 C5 H8 118.817 C2 C6 C5 58.467
C2 C6 H9 118.817 C2 C6 H10 118.817
H3 C1 H4 117.348 C5 C2 C6 63.067
C5 C6 H9 117.843 C5 C6 H10 117.843
C6 C5 H7 117.843 C6 C5 H8 117.843
H7 C5 H8 114.087 H9 C6 H10 114.087
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.380      
2 C 0.138      
3 H 0.129      
4 H 0.129      
5 C -0.315      
6 C -0.315      
7 H 0.154      
8 H 0.154      
9 H 0.154      
10 H 0.154      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.428 0.428
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.767 0.000 0.000
y 0.000 -23.707 0.000
z 0.000 0.000 -23.996
Traceless
 xyz
x -0.916 0.000 0.000
y 0.000 0.674 0.000
z 0.000 0.000 0.242
Polar
3z2-r20.484
x2-y2-1.060
xy0.000
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 76.483
(<r2>)1/2 8.745