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All results from a given calculation for C4H6 (Methylenecyclopropane)

using model chemistry: mPW1PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/3-21G
 hartrees
Energy at 0K-155.062734
Energy at 298.15K-155.068611
Nuclear repulsion energy109.143418
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 mPW1PW91/3-21G
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 3173 3029 0.46      
2 A1 3171 3027 15.13      
3 A1 1873 1788 3.60      
4 A1 1529 1459 0.07      
5 A1 1499 1431 1.91      
6 A1 1080 1031 16.78      
7 A1 1044 996 1.55      
8 A1 734 701 6.74      
9 A2 3250 3102 0.00      
10 A2 1189 1135 0.00      
11 A2 990 945 0.00      
12 A2 645 616 0.00      
13 B1 3265 3116 8.60      
14 B1 1140 1089 0.06      
15 B1 968 924 56.38      
16 B1 784 748 2.44      
17 B1 333 318 6.76      
18 B2 3253 3105 9.67      
19 B2 3169 3025 7.09      
20 B2 1493 1426 3.75      
21 B2 1185 1131 14.75      
22 B2 1119 1068 6.61      
23 B2 909 868 10.81      
24 B2 371 355 0.90      

Unscaled Zero Point Vibrational Energy (zpe) 19081.9 cm-1
Scaled (by 0.9546) Zero Point Vibrational Energy (zpe) 18215.6 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 mPW1PW91/3-21G
ABC
0.64561 0.22931 0.18157

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.635
C2 0.000 0.000 0.321
H3 0.000 0.926 2.201
H4 0.000 -0.926 2.201
C5 0.000 0.776 -0.934
C6 0.000 -0.776 -0.934
H7 0.917 1.273 -1.233
H8 -0.917 1.273 -1.233
H9 -0.917 -1.273 -1.233
H10 0.917 -1.273 -1.233

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.31361.08531.08532.68342.68343.26853.26853.26853.2685
C21.31362.09532.09531.47581.47582.20802.20802.20802.2080
H31.08532.09531.85213.13833.56713.57063.57064.17904.1790
H41.08532.09531.85213.56713.13834.17904.17903.57063.5706
C52.68341.47583.13833.56711.55251.08481.08482.26472.2647
C62.68341.47583.56713.13831.55252.26472.26471.08481.0848
H73.26852.20803.57064.17901.08482.26471.83403.13762.5457
H83.26852.20803.57064.17901.08482.26471.83402.54573.1376
H93.26852.20804.17903.57062.26471.08483.13762.54571.8340
H103.26852.20804.17903.57062.26471.08482.54573.13761.8340

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.265 C1 C2 C6 148.265
C2 C1 H3 121.433 C2 C1 H4 121.433
C2 C5 C6 58.265 C2 C5 H7 118.357
C2 C5 H8 118.357 C2 C6 C5 58.265
C2 C6 H9 118.357 C2 C6 H10 118.357
H3 C1 H4 117.134 C5 C2 C6 63.469
C5 C6 H9 117.246 C5 C6 H10 117.246
C6 C5 H7 117.246 C6 C5 H8 117.246
H7 C5 H8 115.418 H9 C6 H10 115.418
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.563      
2 C -0.033      
3 H 0.214      
4 H 0.214      
5 C -0.404      
6 C -0.404      
7 H 0.244      
8 H 0.244      
9 H 0.244      
10 H 0.244      


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 -0.339 0.339
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.293 0.000 0.000
y 0.000 -23.924 0.000
z 0.000 0.000 -23.987
Traceless
 xyz
x -1.338 0.000 0.000
y 0.000 0.716 0.000
z 0.000 0.000 0.622
Polar
3z2-r21.244
x2-y2-1.370
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> 76.915
(<r2>)1/2 8.770