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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: HF/6-31G

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/6-31G
 hartrees
Energy at 0K-115.766417
Energy at 298.15K-115.769825
HF Energy-115.766417
Nuclear repulsion energy63.997774
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/6-31G
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 3546 3202 0.85 111.28 0.11 0.20
2 A1 3249 2934 55.05 129.16 0.16 0.28
3 A1 1849 1669 17.19 50.55 0.22 0.36
4 A1 1675 1512 1.73 17.39 0.26 0.41
5 A1 1235 1115 0.25 10.69 0.22 0.36
6 A1 1019 920 4.17 10.48 0.61 0.76
7 A2 1117 1008 0.00 20.90 0.75 0.86
8 A2 1000 903 0.00 0.40 0.75 0.86
9 B1 3320 2997 65.32 91.41 0.75 0.86
10 B1 1214 1096 4.49 3.57 0.75 0.86
11 B1 733 662 134.76 0.85 0.75 0.86
12 B2 3491 3152 2.03 60.96 0.75 0.86
13 B2 1233 1113 28.92 0.21 0.75 0.86
14 B2 1189 1073 45.03 0.10 0.75 0.86
15 B2 843 761 19.83 21.55 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13355.1 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 12058.3 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/6-31G
ABC
1.02341 0.72619 0.46291

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.868
C2 0.000 0.643 -0.504
C3 0.000 -0.643 -0.504
H4 0.000 1.560 -1.039
H5 0.000 -1.560 -1.039
H6 0.901 0.000 1.459
H7 -0.901 0.000 1.459

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.51511.51512.46352.46351.07731.0773
C21.51511.28661.06142.26742.25332.2533
C31.51511.28662.26741.06142.25332.2533
H42.46351.06142.26743.12023.07953.0795
H52.46352.26741.06143.12023.07953.0795
H61.07732.25332.25333.07953.07951.8012
H71.07732.25332.25333.07953.07951.8012

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.875 C1 C2 H4 145.385
C1 C3 C2 64.875 C1 C3 H5 145.385
C2 C1 C3 50.249 C2 C1 H6 119.789
C2 C1 H7 119.789 C2 C3 H5 149.740
C3 C1 H6 119.789 C3 C1 H7 119.789
C3 C2 H4 149.740 H6 C1 H7 113.442
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.339      
2 C -0.201      
3 C -0.201      
4 H 0.218      
5 H 0.218      
6 H 0.152      
7 H 0.152      


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 -0.522 0.522
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.624 0.000 0.000
y 0.000 -17.045 0.000
z 0.000 0.000 -18.351
Traceless
 xyz
x -1.926 0.000 0.000
y 0.000 1.943 0.000
z 0.000 0.000 -0.017
Polar
3z2-r2-0.034
x2-y2-2.580
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.532 0.000 0.000
y 0.000 4.626 0.000
z 0.000 0.000 4.614


<r2> (average value of r2) Å2
<r2> 36.891
(<r2>)1/2 6.074