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All results from a given calculation for C4H6 (Methylenecyclopropane)

using model chemistry: BLYP/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 BLYP/3-21G
 hartrees
Energy at 0K-155.013076
Energy at 298.15K-155.018773
Nuclear repulsion energy107.981073
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 BLYP/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 3062 3045 1.48      
2 A1 3059 3042 24.36      
3 A1 1773 1763 2.50      
4 A1 1493 1485 0.06      
5 A1 1464 1456 0.34      
6 A1 1025 1019 12.23      
7 A1 979 973 0.41      
8 A1 675 672 4.63      
9 A2 3130 3112 0.00      
10 A2 1143 1137 0.00      
11 A2 958 952 0.00      
12 A2 623 620 0.00      
13 B1 3145 3127 18.16      
14 B1 1094 1088 0.00      
15 B1 907 902 44.30      
16 B1 751 747 1.53      
17 B1 303 301 4.46      
18 B2 3133 3116 16.02      
19 B2 3057 3040 11.83      
20 B2 1462 1454 1.41      
21 B2 1141 1134 9.89      
22 B2 1058 1052 5.36      
23 B2 857 853 10.87      
24 B2 358 356 0.57      

Unscaled Zero Point Vibrational Energy (zpe) 18323.8 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 18223.0 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 BLYP/3-21G
ABC
0.62815 0.22506 0.17768

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.650
C2 0.000 0.000 0.324
H3 0.000 0.931 2.224
H4 0.000 -0.931 2.224
C5 0.000 0.789 -0.942
C6 0.000 -0.789 -0.942
H7 0.923 1.289 -1.247
H8 -0.923 1.289 -1.247
H9 -0.923 -1.289 -1.247
H10 0.923 -1.289 -1.247

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.32591.09371.09372.70982.70983.30283.30283.30283.3028
C21.32592.11542.11541.49221.49222.23232.23232.23232.2323
H31.09372.11541.86283.16883.60313.60913.60914.22254.2225
H41.09372.11541.86283.60313.16884.22254.22253.60913.6091
C52.70981.49223.16883.60311.57871.09301.09302.29472.2947
C62.70981.49223.60313.16881.57872.29472.29471.09301.0930
H73.30282.23233.60914.22251.09302.29471.84553.17112.5788
H83.30282.23233.60914.22251.09302.29471.84552.57883.1711
H93.30282.23234.22253.60912.29471.09303.17112.57881.8455
H103.30282.23234.22253.60912.29471.09302.57883.17111.8455

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.063 C1 C2 C6 148.063
C2 C1 H3 121.618 C2 C1 H4 121.618
C2 C5 C6 58.063 C2 C5 H7 118.613
C2 C5 H8 118.613 C2 C6 C5 58.063
C2 C6 H9 118.613 C2 C6 H10 118.613
H3 C1 H4 116.765 C5 C2 C6 63.873
C5 C6 H9 117.228 C5 C6 H10 117.228
C6 C5 H7 117.228 C6 C5 H8 117.228
H7 C5 H8 115.184 H9 C6 H10 115.184
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.491      
2 C 0.014      
3 H 0.170      
4 H 0.170      
5 C -0.329      
6 C -0.329      
7 H 0.199      
8 H 0.199      
9 H 0.199      
10 H 0.199      


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 -0.340 0.340
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.364 0.000 0.000
y 0.000 -24.191 0.000
z 0.000 0.000 -24.348
Traceless
 xyz
x -1.095 0.000 0.000
y 0.000 0.666 0.000
z 0.000 0.000 0.430
Polar
3z2-r20.859
x2-y2-1.174
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> 78.384
(<r2>)1/2 8.853