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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: B3LYP/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at B3LYP/CEP-121G*
 hartrees
Energy at 0K-19.252435
Energy at 298.15K-19.255605
HF Energy-19.252435
Nuclear repulsion energy33.758560
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/CEP-121G*
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 3262 3162 0.69 157.79 0.15 0.26
2 A1 3015 2923 92.63 154.52 0.17 0.30
3 A1 1699 1647 19.92 48.19 0.16 0.28
4 A1 1519 1472 4.29 18.09 0.20 0.33
5 A1 1137 1102 0.32 13.80 0.16 0.27
6 A1 914 886 3.87 7.33 0.56 0.72
7 A2 1006 976 0.00 11.39 0.75 0.86
8 A2 845 819 0.00 0.09 0.75 0.86
9 B1 3083 2989 71.37 112.60 0.75 0.86
10 B1 1095 1061 1.00 2.65 0.75 0.86
11 B1 594 576 90.80 0.92 0.75 0.86
12 B2 3217 3118 1.48 92.18 0.75 0.86
13 B2 1054 1021 40.72 1.56 0.75 0.86
14 B2 1016 985 27.41 0.02 0.75 0.86
15 B2 773 749 14.91 18.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12113.1 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 11742.4 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/CEP-121G*
ABC
0.99332 0.71575 0.45401

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.872
C2 0.000 0.652 -0.506
C3 0.000 -0.652 -0.506
H4 0.000 1.588 -1.052
H5 0.000 -1.588 -1.052
H6 0.917 0.000 1.472
H7 -0.917 0.000 1.472

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.52451.52452.49452.49451.09641.0964
C21.52451.30321.08382.30522.27622.2762
C31.52451.30322.30521.08382.27622.2762
H42.49451.08382.30523.17623.12003.1200
H52.49452.30521.08383.17623.12003.1200
H61.09642.27622.27623.12003.12001.8349
H71.09642.27622.27623.12003.12001.8349

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.695 C1 C2 H4 145.526
C1 C3 C2 64.695 C1 C3 H5 145.526
C2 C1 C3 50.610 C2 C1 H6 119.672
C2 C1 H7 119.672 C2 C3 H5 149.779
C3 C1 H6 119.672 C3 C1 H7 119.672
C3 C2 H4 149.779 H6 C1 H7 113.599
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.394      
2 C -0.157      
3 C -0.157      
4 H 0.207      
5 H 0.207      
6 H 0.147      
7 H 0.147      


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 -0.458 0.458
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.459 0.000 0.000
y 0.000 -16.783 0.000
z 0.000 0.000 -18.460
Traceless
 xyz
x -1.838 0.000 0.000
y 0.000 2.177 0.000
z 0.000 0.000 -0.339
Polar
3z2-r2-0.677
x2-y2-2.677
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.308 0.000 0.000
y 0.000 5.246 0.000
z 0.000 0.000 5.482


<r2> (average value of r2) Å2
<r2> 33.152
(<r2>)1/2 5.758