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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: B3LYP/3-21G*

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/3-21G*
 hartrees
Energy at 0K-115.968343
Energy at 298.15K-115.971571
HF Energy-115.968343
Nuclear repulsion energy63.343068
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/3-21G*
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 3347 3220 0.23 113.19 0.12 0.21
2 A1 3095 2978 41.18 103.57 0.15 0.26
3 A1 1714 1648 9.32 27.69 0.23 0.37
4 A1 1562 1502 1.45 15.61 0.35 0.52
5 A1 1119 1077 1.53 6.71 0.17 0.29
6 A1 928 893 3.29 10.77 0.58 0.73
7 A2 1037 998 0.00 19.38 0.75 0.86
8 A2 903 869 0.00 0.05 0.75 0.86
9 B1 3171 3051 43.34 74.18 0.75 0.86
10 B1 1118 1076 2.60 4.00 0.75 0.86
11 B1 656 631 96.01 1.35 0.75 0.86
12 B2 3296 3171 0.19 61.75 0.75 0.86
13 B2 1099 1057 15.70 0.19 0.75 0.86
14 B2 1061 1021 60.78 0.94 0.75 0.86
15 B2 734 706 8.58 17.36 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12420.1 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 11948.2 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 B3LYP/3-21G*
ABC
1.00251 0.71075 0.45389

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.880
C2 0.000 0.650 -0.509
C3 0.000 -0.650 -0.509
H4 0.000 1.574 -1.051
H5 0.000 -1.574 -1.051
H6 0.917 0.000 1.464
H7 -0.917 0.000 1.464

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.53261.53262.49082.49081.08781.0878
C21.53261.29911.07172.28862.27052.2705
C31.53261.29912.28861.07172.27052.2705
H42.49081.07172.28863.14763.10563.1056
H52.49082.28861.07173.14763.10563.1056
H61.08782.27052.27053.10563.10561.8349
H71.08782.27052.27053.10563.10561.8349

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.923 C1 C2 H4 145.488
C1 C3 C2 64.923 C1 C3 H5 145.488
C2 C1 C3 50.154 C2 C1 H6 119.124
C2 C1 H7 119.124 C2 C3 H5 149.589
C3 C1 H6 119.124 C3 C1 H7 119.124
C3 C2 H4 149.589 H6 C1 H7 114.994
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.358      
2 C -0.191      
3 C -0.191      
4 H 0.182      
5 H 0.182      
6 H 0.188      
7 H 0.188      


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 -0.491 0.491
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.426 0.000 0.000
y 0.000 -16.931 0.000
z 0.000 0.000 -18.049
Traceless
 xyz
x -1.936 0.000 0.000
y 0.000 1.807 0.000
z 0.000 0.000 0.129
Polar
3z2-r20.258
x2-y2-2.495
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.365 0.000 0.000
y 0.000 4.319 0.000
z 0.000 0.000 4.437


<r2> (average value of r2) Å2
<r2> 37.269
(<r2>)1/2 6.105