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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-115.924363
Energy at 298.15K-115.927611
HF Energy-115.924363
Nuclear repulsion energy63.386620
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 B3PW91/3-21G
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 3358 3228 0.36 110.50 0.12 0.21
2 A1 3101 2981 39.76 105.01 0.15 0.26
3 A1 1714 1647 8.11 28.32 0.23 0.37
4 A1 1555 1495 1.13 14.95 0.36 0.52
5 A1 1130 1086 1.78 7.20 0.19 0.31
6 A1 931 895 4.68 9.41 0.60 0.75
7 A2 1040 1000 0.00 19.24 0.75 0.86
8 A2 906 870 0.00 0.10 0.75 0.86
9 B1 3180 3057 40.54 74.83 0.75 0.86
10 B1 1118 1074 2.37 3.92 0.75 0.86
11 B1 663 637 106.63 1.21 0.75 0.86
12 B2 3306 3178 0.45 59.61 0.75 0.86
13 B2 1102 1059 24.22 0.28 0.75 0.86
14 B2 1060 1019 56.54 0.49 0.75 0.86
15 B2 753 724 10.75 17.46 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12458.4 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 11975.0 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 B3PW91/3-21G
ABC
1.00038 0.71430 0.45501

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.877
C2 0.000 0.650 -0.507
C3 0.000 -0.650 -0.507
H4 0.000 1.575 -1.049
H5 0.000 -1.575 -1.049
H6 0.919 0.000 1.461
H7 -0.919 0.000 1.461

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.52891.52892.48822.48821.08891.0889
C21.52891.30051.07232.29072.26732.2673
C31.52891.30052.29071.07232.26732.2673
H42.48821.07232.29073.15093.10293.1029
H52.48822.29071.07233.15093.10293.1029
H61.08892.26732.26733.10293.10291.8375
H71.08892.26732.26733.10293.10291.8375

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.831 C1 C2 H4 145.538
C1 C3 C2 64.831 C1 C3 H5 145.538
C2 C1 C3 50.338 C2 C1 H6 119.066
C2 C1 H7 119.066 C2 C3 H5 149.631
C3 C1 H6 119.066 C3 C1 H7 119.066
C3 C2 H4 149.631 H6 C1 H7 115.071
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.404      
2 C -0.219      
3 C -0.219      
4 H 0.210      
5 H 0.210      
6 H 0.211      
7 H 0.211      


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 -0.479 0.479
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.435 0.000 0.000
y 0.000 -16.789 0.000
z 0.000 0.000 -17.935
Traceless
 xyz
x -2.073 0.000 0.000
y 0.000 1.896 0.000
z 0.000 0.000 0.177
Polar
3z2-r20.354
x2-y2-2.646
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.376 0.000 0.000
y 0.000 4.323 0.000
z 0.000 0.000 4.436


<r2> (average value of r2) Å2
<r2> 37.170
(<r2>)1/2 6.097