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All results from a given calculation for C4H6 (Methylenecyclopropane)

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at G4
 hartrees
Energy at 0K-155.843051
Energy at 298.15K-155.837813
HF Energy-155.976850
Nuclear repulsion energy109.412555
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/6-31G(2df,p)
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 3134 3025 11.58      
2 A1 3110 3001 14.17      
3 A1 1851 1786 4.47      
4 A1 1489 1437 0.33      
5 A1 1448 1398 0.07      
6 A1 1072 1034 1.93      
7 A1 1043 1007 2.37      
8 A1 750 724 3.93      
9 A2 3180 3069 0.00      
10 A2 1169 1129 0.00      
11 A2 962 929 0.00      
12 A2 619 597 0.00      
13 B1 3193 3082 16.75      
14 B1 1100 1061 0.70      
15 B1 924 892 32.77      
16 B1 751 725 1.14      
17 B1 304 293 2.30      
18 B2 3213 3100 11.55      
19 B2 3109 3000 16.38      
20 B2 1452 1401 0.70      
21 B2 1146 1106 6.52      
22 B2 1076 1038 0.82      
23 B2 907 875 12.85      
24 B2 359 346 0.11      

Unscaled Zero Point Vibrational Energy (zpe) 18680.4 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 18026.6 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 B3LYP/6-31G(2df,p)
ABC
0.65228 0.22999 0.18235

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.634
C2 0.000 0.000 0.317
H3 0.000 0.925 2.202
H4 0.000 -0.925 2.202
C5 0.000 0.769 -0.931
C6 0.000 -0.769 -0.931
H7 0.911 1.277 -1.236
H8 -0.911 1.277 -1.236
H9 -0.911 -1.277 -1.236
H10 0.911 -1.277 -1.236

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.31641.08591.08592.67732.67733.27033.27033.27033.2703
C21.31642.09982.09981.46591.46592.20752.20752.20752.2075
H31.08592.09981.85043.13683.56173.57403.57404.18334.1833
H41.08592.09981.85043.56173.13684.18334.18333.57403.5740
C52.67731.46593.13683.56171.53821.08701.08702.26062.2606
C62.67731.46593.56173.13681.53822.26062.26061.08701.0870
H73.27032.20753.57404.18331.08702.26061.82273.13782.5540
H83.27032.20753.57404.18331.08702.26061.82272.55403.1378
H93.27032.20754.18333.57402.26061.08703.13782.55401.8227
H103.27032.20754.18333.57402.26061.08702.55403.13781.8227

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.389 C1 C2 C6 148.389
C2 C1 H3 121.564 C2 C1 H4 121.564
C2 C5 C6 58.389 C2 C5 H7 118.863
C2 C5 H8 118.863 C2 C6 C5 58.389
C2 C6 H9 118.863 C2 C6 H10 118.863
H3 C1 H4 116.873 C5 C2 C6 63.222
C5 C6 H9 117.867 C5 C6 H10 117.867
C6 C5 H7 117.867 C6 C5 H8 117.867
H7 C5 H8 114.029 H9 C6 H10 114.029
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.450      
2 C 0.391      
3 H 0.109      
4 H 0.109      
5 C -0.327      
6 C -0.327      
7 H 0.124      
8 H 0.124      
9 H 0.124      
10 H 0.124      


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 -0.413 0.413
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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> 76.738
(<r2>)1/2 8.760