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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: B3LYP/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 B3LYP/CEP-121G
 hartrees
Energy at 0K-19.213645
Energy at 298.15K-19.216843
HF Energy-19.213645
Nuclear repulsion energy33.448896
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/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3279 3195 0.50 156.07 0.14 0.24
2 A1 3025 2948 73.23 143.71 0.18 0.30
3 A1 1662 1619 17.38 50.36 0.16 0.27
4 A1 1514 1476 0.92 20.44 0.18 0.31
5 A1 1121 1093 0.02 14.79 0.15 0.27
6 A1 921 898 5.63 9.08 0.52 0.69
7 A2 1003 978 0.00 12.68 0.75 0.86
8 A2 857 835 0.00 0.23 0.75 0.86
9 B1 3114 3035 68.46 101.96 0.75 0.86
10 B1 1088 1060 0.60 3.36 0.75 0.86
11 B1 621 605 118.63 0.90 0.75 0.86
12 B2 3224 3142 0.36 89.05 0.75 0.86
13 B2 1079 1051 37.06 1.64 0.75 0.86
14 B2 1033 1007 42.23 0.29 0.75 0.86
15 B2 734 715 13.34 18.52 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12137.4 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 11827.9 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/CEP-121G
ABC
0.97682 0.69564 0.44249

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.889
C2 0.000 0.660 -0.515
C3 0.000 -0.660 -0.515
H4 0.000 1.592 -1.061
H5 0.000 -1.592 -1.061
H6 0.918 0.000 1.483
H7 -0.918 0.000 1.483

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.55151.55152.51702.51701.09301.0930
C21.55151.32001.07972.31682.29572.2957
C31.55151.32002.31681.07972.29572.2957
H42.51701.07972.31683.18333.13803.1380
H52.51702.31681.07973.18333.13803.1380
H61.09302.29572.29573.13803.13801.8351
H71.09302.29572.29573.13803.13801.8351

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.824 C1 C2 H4 145.538
C1 C3 C2 64.824 C1 C3 H5 145.538
C2 C1 C3 50.351 C2 C1 H6 119.461
C2 C1 H7 119.461 C2 C3 H5 149.637
C3 C1 H6 119.461 C3 C1 H7 119.461
C3 C2 H4 149.637 H6 C1 H7 114.162
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.379      
2 C -0.133      
3 C -0.133      
4 H 0.187      
5 H 0.187      
6 H 0.135      
7 H 0.135      


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 -0.431 0.431
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.592 0.000 0.000
y 0.000 -17.138 0.000
z 0.000 0.000 -18.427
Traceless
 xyz
x -1.810 0.000 0.000
y 0.000 1.871 0.000
z 0.000 0.000 -0.062
Polar
3z2-r2-0.124
x2-y2-2.454
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.182 0.000 0.000
y 0.000 5.237 0.000
z 0.000 0.000 5.427


<r2> (average value of r2) Å2
<r2> 33.652
(<r2>)1/2 5.801