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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-116.575826
Energy at 298.15K-116.579039
HF Energy-116.575826
Nuclear repulsion energy63.821499
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 B3PW91/6-31G*
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 3328 3184 0.11 136.25 0.13 0.23
2 A1 3061 2928 72.68 129.57 0.15 0.26
3 A1 1760 1684 11.29 34.28 0.20 0.33
4 A1 1550 1483 4.63 16.47 0.31 0.48
5 A1 1193 1141 1.13 8.53 0.19 0.32
6 A1 935 894 3.93 8.70 0.66 0.80
7 A2 1027 982 0.00 16.87 0.75 0.86
8 A2 858 821 0.00 0.00 0.75 0.86
9 B1 3122 2987 60.71 91.59 0.75 0.86
10 B1 1128 1079 1.49 3.49 0.75 0.86
11 B1 603 577 70.79 1.53 0.75 0.86
12 B2 3282 3140 0.52 72.85 0.75 0.86
13 B2 1087 1040 39.36 0.54 0.75 0.86
14 B2 1041 996 22.92 0.03 0.75 0.86
15 B2 816 780 14.18 18.51 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12394.8 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 11858.1 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 B3PW91/6-31G*
ABC
1.00379 0.73378 0.46308

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.858
C2 0.000 0.648 -0.499
C3 0.000 -0.648 -0.499
H4 0.000 1.583 -1.039
H5 0.000 -1.583 -1.039
H6 0.914 0.000 1.462
H7 -0.914 0.000 1.462

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.50411.50412.47102.47101.09511.0951
C21.50411.29501.08002.29472.25852.2585
C31.50411.29502.29471.08002.25852.2585
H42.47101.08002.29473.16553.09793.0979
H52.47102.29471.08003.16553.09793.0979
H61.09512.25852.25853.09793.09791.8270
H71.09512.25852.25853.09793.09791.8270

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.500 C1 C2 H4 145.503
C1 C3 C2 64.500 C1 C3 H5 145.503
C2 C1 C3 50.999 C2 C1 H6 119.851
C2 C1 H7 119.851 C2 C3 H5 149.997
C3 C1 H6 119.851 C3 C1 H7 119.851
C3 C2 H4 149.997 H6 C1 H7 113.065
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.370      
2 C -0.141      
3 C -0.141      
4 H 0.171      
5 H 0.171      
6 H 0.155      
7 H 0.155      


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 -0.520 0.520
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.946 0.000 0.000
y 0.000 -16.454 0.000
z 0.000 0.000 -18.023
Traceless
 xyz
x -1.707 0.000 0.000
y 0.000 2.030 0.000
z 0.000 0.000 -0.323
Polar
3z2-r2-0.646
x2-y2-2.492
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.739 0.000 0.000
y 0.000 4.636 0.000
z 0.000 0.000 4.731


<r2> (average value of r2) Å2
<r2> 36.680
(<r2>)1/2 6.056