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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: B3LYP/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 B3LYP/6-31G*
 hartrees
Energy at 0K-116.619041
Energy at 298.15K-116.622247
HF Energy-116.619041
Nuclear repulsion energy63.730727
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/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 3314 3183 0.19 138.29 0.13 0.23
2 A1 3051 2930 73.04 126.70 0.15 0.26
3 A1 1754 1684 12.29 33.13 0.20 0.33
4 A1 1553 1491 5.16 16.97 0.31 0.48
5 A1 1177 1130 1.06 8.38 0.18 0.31
6 A1 936 899 2.73 10.01 0.65 0.79
7 A2 1024 983 0.00 17.13 0.75 0.86
8 A2 861 827 0.00 0.01 0.75 0.86
9 B1 3109 2986 63.65 90.36 0.75 0.86
10 B1 1127 1082 1.66 3.57 0.75 0.86
11 B1 603 579 62.75 1.72 0.75 0.86
12 B2 3269 3139 0.80 75.03 0.75 0.86
13 B2 1085 1042 34.61 0.68 0.75 0.86
14 B2 1044 1002 26.64 0.23 0.75 0.86
15 B2 798 767 10.65 18.52 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12352.1 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 11861.7 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 B3LYP/6-31G*
ABC
1.00445 0.72909 0.46129

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.861
C2 0.000 0.647 -0.501
C3 0.000 -0.647 -0.501
H4 0.000 1.582 -1.043
H5 0.000 -1.582 -1.043
H6 0.913 0.000 1.466
H7 -0.913 0.000 1.466

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.50881.50882.47532.47531.09481.0948
C21.50881.29491.07982.29402.26322.2632
C31.50881.29492.29401.07982.26322.2632
H42.47531.07982.29403.16353.10283.1028
H52.47532.29401.07983.16353.10283.1028
H61.09482.26322.26323.10283.10281.8257
H71.09482.26322.26323.10283.10281.8257

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.589 C1 C2 H4 145.495
C1 C3 C2 64.589 C1 C3 H5 145.495
C2 C1 C3 50.823 C2 C1 H6 119.909
C2 C1 H7 119.909 C2 C3 H5 149.917
C3 C1 H6 119.909 C3 C1 H7 119.909
C3 C2 H4 149.917 H6 C1 H7 112.987
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.323      
2 C -0.113      
3 C -0.113      
4 H 0.142      
5 H 0.142      
6 H 0.132      
7 H 0.132      


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 -18.983 0.000 0.000
y 0.000 -16.642 0.000
z 0.000 0.000 -18.167
Traceless
 xyz
x -1.578 0.000 0.000
y 0.000 1.933 0.000
z 0.000 0.000 -0.354
Polar
3z2-r2-0.709
x2-y2-2.340
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.725 0.000 0.000
y 0.000 4.638 0.000
z 0.000 0.000 4.732


<r2> (average value of r2) Å2
<r2> 36.840
(<r2>)1/2 6.070