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All results from a given calculation for C4H6 (Methylenecyclopropane)

using model chemistry: HF/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 HF/3-21G*
 hartrees
Energy at 0K-154.018726
Energy at 298.15K-154.024839
Nuclear repulsion energy109.852754
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 HF/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 3309 2987 0.05      
2 A1 3308 2986 21.71      
3 A1 1987 1794 2.42      
4 A1 1637 1478 0.24      
5 A1 1605 1449 0.67      
6 A1 1199 1082 5.96      
7 A1 1081 975 4.12      
8 A1 765 690 13.36      
9 A2 3380 3051 0.00      
10 A2 1283 1158 0.00      
11 A2 1071 967 0.00      
12 A2 699 631 0.00      
13 B1 3396 3065 14.26      
14 B1 1243 1122 0.01      
15 B1 1102 995 57.86      
16 B1 842 760 1.28      
17 B1 380 343 7.93      
18 B2 3382 3053 13.12      
19 B2 3303 2981 12.33      
20 B2 1599 1444 1.96      
21 B2 1278 1153 15.58      
22 B2 1241 1120 1.05      
23 B2 951 859 15.85      
24 B2 398 360 0.51      

Unscaled Zero Point Vibrational Energy (zpe) 20219.4 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 18250.0 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 HF/3-21G*
ABC
0.65384 0.23209 0.18366

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.624
C2 0.000 0.000 0.323
H3 0.000 0.916 2.185
H4 0.000 -0.916 2.185
C5 0.000 0.772 -0.930
C6 0.000 -0.772 -0.930
H7 0.907 1.266 -1.224
H8 -0.907 1.266 -1.224
H9 -0.907 -1.266 -1.224
H10 0.907 -1.266 -1.224

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.30071.07391.07392.66832.66833.24553.24553.24553.2455
C21.30072.07492.07491.47221.47222.19502.19502.19502.1950
H31.07392.07491.83113.11863.54323.54483.54484.14754.1475
H41.07392.07491.83113.54323.11864.14754.14753.54483.5448
C52.66831.47223.11863.54321.54471.07341.07342.25012.2501
C62.66831.47223.54323.11861.54472.25012.25011.07341.0734
H73.24552.19503.54484.14751.07342.25011.81373.11452.5318
H83.24552.19503.54484.14751.07342.25011.81372.53183.1145
H93.24552.19504.14753.54482.25011.07343.11452.53181.8137
H103.24552.19504.14753.54482.25011.07342.53183.11451.8137

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.357 C1 C2 C6 148.357
C2 C1 H3 121.511 C2 C1 H4 121.511
C2 C5 C6 58.357 C2 C5 H7 118.296
C2 C5 H8 118.296 C2 C6 C5 58.357
C2 C6 H9 118.296 C2 C6 H10 118.296
H3 C1 H4 116.979 C5 C2 C6 63.285
C5 C6 H9 117.375 C5 C6 H10 117.375
C6 C5 H7 117.375 C6 C5 H8 117.375
H7 C5 H8 115.316 H9 C6 H10 115.316
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.524 -0.556    
2 C -0.094 0.230    
3 H 0.215 0.196    
4 H 0.215 0.196    
5 C -0.386 -0.292    
6 C -0.386 -0.292    
7 H 0.240 0.129    
8 H 0.240 0.129    
9 H 0.240 0.129    
10 H 0.240 0.129    


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 -0.295 0.295
CHELPG 0.000 0.000 -0.280 0.280
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.887 0.000 0.000
y 0.000 -24.504 0.000
z 0.000 0.000 -24.531
Traceless
 xyz
x -1.370 0.000 0.000
y 0.000 0.705 0.000
z 0.000 0.000 0.665
Polar
3z2-r21.329
x2-y2-1.383
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.422 0.000 0.000
y 0.000 5.329 0.000
z 0.000 0.000 7.695


<r2> (average value of r2) Å2
<r2> 76.504
(<r2>)1/2 8.747