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All results from a given calculation for C4H6 (Methylenecyclopropane)

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-155.046887
Energy at 298.15K-155.052726
Nuclear repulsion energy108.962955
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 B3PW91/3-21G*
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 3153 3025 0.51      
2 A1 3151 3023 16.61      
3 A1 1856 1781 3.57      
4 A1 1521 1459 0.06      
5 A1 1491 1431 1.69      
6 A1 1070 1027 16.91      
7 A1 1034 992 1.22      
8 A1 726 697 6.35      
9 A2 3229 3098 0.00      
10 A2 1180 1133 0.00      
11 A2 983 943 0.00      
12 A2 641 615 0.00      
13 B1 3244 3112 9.98      
14 B1 1132 1086 0.05      
15 B1 957 918 55.49      
16 B1 779 747 2.42      
17 B1 329 316 6.48      
18 B2 3232 3100 10.72      
19 B2 3149 3021 7.86      
20 B2 1486 1426 3.49      
21 B2 1177 1129 14.23      
22 B2 1108 1063 6.65      
23 B2 901 865 10.74      
24 B2 369 354 0.90      

Unscaled Zero Point Vibrational Energy (zpe) 18949.0 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 18179.7 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 B3PW91/3-21G*
ABC
0.64313 0.22862 0.18097

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.637
C2 0.000 0.000 0.322
H3 0.000 0.927 2.205
H4 0.000 -0.927 2.205
C5 0.000 0.778 -0.935
C6 0.000 -0.778 -0.935
H7 0.918 1.275 -1.235
H8 -0.918 1.275 -1.235
H9 -0.918 -1.275 -1.235
H10 0.918 -1.275 -1.235

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.31571.08701.08702.68752.68753.27393.27393.27393.2739
C21.31572.09892.09891.47801.47802.21182.21182.21182.2118
H31.08702.09891.85453.14343.57293.57693.57694.18624.1862
H41.08702.09891.85453.57293.14344.18624.18623.57693.5769
C52.68751.47803.14343.57291.55581.08641.08642.26912.2691
C62.68751.47803.57293.14341.55582.26912.26911.08641.0864
H73.27392.21183.57694.18621.08642.26911.83633.14302.5508
H83.27392.21183.57694.18621.08642.26911.83632.55083.1430
H93.27392.21184.18623.57692.26911.08643.14302.55081.8363
H103.27392.21184.18623.57692.26911.08642.55083.14301.8363

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.244 C1 C2 C6 148.244
C2 C1 H3 121.463 C2 C1 H4 121.463
C2 C5 C6 58.244 C2 C5 H7 118.394
C2 C5 H8 118.394 C2 C6 C5 58.244
C2 C6 H9 118.394 C2 C6 H10 118.394
H3 C1 H4 117.074 C5 C2 C6 63.511
C5 C6 H9 117.254 C5 C6 H10 117.254
C6 C5 H7 117.254 C6 C5 H8 117.254
H7 C5 H8 115.369 H9 C6 H10 115.369
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.559      
2 C -0.025      
3 H 0.210      
4 H 0.210      
5 C -0.398      
6 C -0.398      
7 H 0.240      
8 H 0.240      
9 H 0.240      
10 H 0.240      


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 -0.344 0.344
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.280 0.000 0.000
y 0.000 -23.927 0.000
z 0.000 0.000 -24.006
Traceless
 xyz
x -1.314 0.000 0.000
y 0.000 0.716 0.000
z 0.000 0.000 0.598
Polar
3z2-r21.195
x2-y2-1.353
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> 77.121
(<r2>)1/2 8.782