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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: HF/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 HF/CEP-121G*
 hartrees
Energy at 0K-18.687271
Energy at 298.15K-18.690647
HF Energy-18.687271
Nuclear repulsion energy34.177958
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/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 3467 3133 0.00 114.23 0.16 0.27
2 A1 3194 2886 98.22 143.95 0.19 0.31
3 A1 1837 1660 28.34 68.76 0.15 0.27
4 A1 1644 1485 4.15 16.13 0.17 0.29
5 A1 1237 1118 0.05 15.48 0.17 0.29
6 A1 1008 910 2.59 6.75 0.52 0.69
7 A2 1095 989 0.00 11.51 0.75 0.86
8 A2 968 875 0.00 0.93 0.75 0.86
9 B1 3260 2945 82.51 106.04 0.75 0.86
10 B1 1189 1074 3.38 2.13 0.75 0.86
11 B1 693 626 121.30 0.29 0.75 0.86
12 B2 3418 3088 0.02 69.92 0.75 0.86
13 B2 1174 1060 37.65 0.62 0.75 0.86
14 B2 1147 1036 24.99 0.02 0.75 0.86
15 B2 871 787 22.61 19.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13101.3 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 11835.7 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/CEP-121G*
ABC
1.02148 0.73207 0.46544

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.862
C2 0.000 0.642 -0.501
C3 0.000 -0.642 -0.501
H4 0.000 1.570 -1.036
H5 0.000 -1.570 -1.036
H6 0.906 0.000 1.458
H7 -0.906 0.000 1.458

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.50641.50642.46282.46281.08521.0852
C21.50641.28301.07152.27542.25242.2524
C31.50641.28302.27541.07152.25242.2524
H42.46281.07152.27543.14063.08333.0833
H52.46282.27541.07153.14063.08333.0833
H61.08522.25242.25243.08333.08331.8128
H71.08522.25242.25243.08333.08331.8128

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.795 C1 C2 H4 145.111
C1 C3 C2 64.795 C1 C3 H5 145.111
C2 C1 C3 50.410 C2 C1 H6 119.834
C2 C1 H7 119.834 C2 C3 H5 150.094
C3 C1 H6 119.834 C3 C1 H7 119.834
C3 C2 H4 150.094 H6 C1 H7 113.288
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.354      
2 C -0.206      
3 C -0.206      
4 H 0.237      
5 H 0.237      
6 H 0.145      
7 H 0.145      


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 -0.486 0.486
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.654 0.000 0.000
y 0.000 -16.617 0.000
z 0.000 0.000 -18.494
Traceless
 xyz
x -2.099 0.000 0.000
y 0.000 2.457 0.000
z 0.000 0.000 -0.358
Polar
3z2-r2-0.716
x2-y2-3.037
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.175 0.000 0.000
y 0.000 5.063 0.000
z 0.000 0.000 5.139


<r2> (average value of r2) Å2
<r2> 32.647
(<r2>)1/2 5.714