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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-115.830527
Energy at 298.15K-115.833921
HF Energy-115.830527
Nuclear repulsion energy64.434769
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 3490 3150 0.25 111.05 0.12 0.22
2 A1 3199 2887 84.29 129.38 0.16 0.28
3 A1 1884 1700 18.94 50.14 0.20 0.34
4 A1 1659 1497 5.50 15.32 0.27 0.43
5 A1 1263 1140 0.02 10.82 0.21 0.34
6 A1 1019 920 2.13 9.29 0.64 0.78
7 A2 1106 999 0.00 16.70 0.75 0.86
8 A2 977 882 0.00 0.08 0.75 0.86
9 B1 3258 2940 76.55 92.79 0.75 0.86
10 B1 1209 1091 4.21 2.84 0.75 0.86
11 B1 697 629 86.60 1.03 0.75 0.86
12 B2 3439 3104 0.23 62.19 0.75 0.86
13 B2 1197 1081 31.24 0.13 0.75 0.86
14 B2 1167 1053 31.15 0.03 0.75 0.86
15 B2 884 798 17.12 20.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13223.1 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 11935.2 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
1.03142 0.74190 0.47119

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 0.854
C2 0.000 0.638 -0.498
C3 0.000 -0.638 -0.498
H4 0.000 1.564 -1.030
H5 0.000 -1.564 -1.030
H6 0.903 0.000 1.453
H7 -0.903 0.000 1.453

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.49511.49512.44852.44851.08341.0834
C21.49511.27621.06752.26502.24202.2420
C31.49511.27622.26501.06752.24202.2420
H42.44851.06752.26503.12713.06973.0697
H52.44852.26501.06753.12713.06973.0697
H61.08342.24202.24203.06973.06971.8066
H71.08342.24202.24203.06973.06971.8066

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.736 C1 C2 H4 145.165
C1 C3 C2 64.736 C1 C3 H5 145.165
C2 C1 C3 50.528 C2 C1 H6 119.952
C2 C1 H7 119.952 C2 C3 H5 150.099
C3 C1 H6 119.952 C3 C1 H7 119.952
C3 C2 H4 150.099 H6 C1 H7 112.981
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 -0.242      
2 C -0.141      
3 C -0.141      
4 H 0.158      
5 H 0.158      
6 H 0.104      
7 H 0.104      


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 -0.557 0.557
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.358 0.000 0.000
y 0.000 -16.619 0.000
z 0.000 0.000 -18.332
Traceless
 xyz
x -1.882 0.000 0.000
y 0.000 2.226 0.000
z 0.000 0.000 -0.343
Polar
3z2-r2-0.686
x2-y2-2.739
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.699 0.000 0.000
y 0.000 4.644 0.000
z 0.000 0.000 4.637


<r2> (average value of r2) Å2
<r2> 36.407
(<r2>)1/2 6.034