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: B3LYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-155.103513
Energy at 298.15K-155.109350
Nuclear repulsion energy108.851825
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 B3LYP/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 A1 3145 3035 0.82      
2 A1 3143 3033 19.02      
3 A1 1845 1780 2.80      
4 A1 1530 1476 0.09      
5 A1 1501 1448 0.88      
6 A1 1070 1032 12.52      
7 A1 1021 985 1.28      
8 A1 711 686 6.15      
9 A2 3216 3103 0.00      
10 A2 1182 1140 0.00      
11 A2 987 952 0.00      
12 A2 644 621 0.00      
13 B1 3231 3117 13.44      
14 B1 1133 1093 0.00      
15 B1 957 924 48.72      
16 B1 778 751 1.75      
17 B1 324 313 5.33      
18 B2 3219 3106 12.74      
19 B2 3141 3030 9.28      
20 B2 1497 1445 2.29      
21 B2 1177 1136 12.12      
22 B2 1108 1070 5.09      
23 B2 891 860 11.43      
24 B2 370 357 0.62      

Unscaled Zero Point Vibrational Energy (zpe) 18910.1 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 18246.4 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 B3LYP/3-21G
ABC
0.64030 0.22837 0.18054

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.638
C2 0.000 0.000 0.322
H3 0.000 0.925 2.207
H4 0.000 -0.925 2.207
C5 0.000 0.781 -0.936
C6 0.000 -0.781 -0.936
H7 0.917 1.278 -1.237
H8 -0.917 1.278 -1.237
H9 -0.917 -1.278 -1.237
H10 0.917 -1.278 -1.237

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.31561.08621.08622.68942.68943.27703.27703.27703.2770
C21.31562.09942.09941.48061.48062.21482.21482.21482.2148
H31.08622.09941.85073.14583.57573.58103.58104.18994.1899
H41.08622.09941.85073.57573.14584.18994.18993.58103.5810
C52.68941.48063.14583.57571.56141.08561.08562.27392.2739
C62.68941.48063.57573.14581.56142.27392.27391.08561.0856
H73.27702.21483.58104.18991.08562.27391.83303.14602.5568
H83.27702.21483.58104.18991.08562.27391.83302.55683.1460
H93.27702.21484.18993.58102.27391.08563.14602.55681.8330
H103.27702.21484.18993.58102.27391.08562.55683.14601.8330

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.178 C1 C2 C6 148.178
C2 C1 H3 121.581 C2 C1 H4 121.581
C2 C5 C6 58.178 C2 C5 H7 118.525
C2 C5 H8 118.525 C2 C6 C5 58.178
C2 C6 H9 118.525 C2 C6 H10 118.525
H3 C1 H4 116.838 C5 C2 C6 63.645
C5 C6 H9 117.289 C5 C6 H10 117.289
C6 C5 H7 117.289 C6 C5 H8 117.289
H7 C5 H8 115.188 H9 C6 H10 115.188
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.513     -0.537
2 C -0.009     0.232
3 H 0.186     0.194
4 H 0.186     0.194
5 C -0.354     -0.371
6 C -0.354     -0.371
7 H 0.215     0.166
8 H 0.215     0.164
9 H 0.215     0.164
10 H 0.215     0.166


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 -0.328 0.328
CHELPG        
AIM        
ESP 0.018 0.000 -0.337 0.338


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.348 0.000 0.000
y 0.000 -24.119 0.000
z 0.000 0.000 -24.243
Traceless
 xyz
x -1.167 0.000 0.000
y 0.000 0.676 0.000
z 0.000 0.000 0.490
Polar
3z2-r20.981
x2-y2-1.229
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.531 0.000 0.000
y 0.000 5.463 0.000
z 0.000 0.000 7.695


<r2> (average value of r2) Å2
<r2> 77.355
(<r2>)1/2 8.795