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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: B2PLYP/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 B2PLYP/6-31G*
 hartrees
Energy at 0K-116.473675
Energy at 298.15K-116.476887
HF Energy-116.345914
Nuclear repulsion energy63.761323
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 B2PLYP/6-31G*
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 3348 3178 0.05 137.34 0.13 0.23
2 A1 3096 2939 64.97 122.37 0.15 0.26
3 A1 1741 1653 13.60 28.60 0.21 0.35
4 A1 1570 1491 4.34 16.88 0.29 0.45
5 A1 1191 1130 0.80 8.32 0.17 0.30
6 A1 949 901 3.04 9.81 0.64 0.78
7 A2 1036 984 0.00 16.76 0.75 0.86
8 A2 850 807 0.00 0.00 0.75 0.86
9 B1 3160 2999 57.56 85.62 0.75 0.86
10 B1 1139 1081 1.65 3.53 0.75 0.86
11 B1 594 564 67.14 1.66 0.75 0.86
12 B2 3304 3136 0.29 72.87 0.75 0.86
13 B2 1098 1042 32.29 0.67 0.75 0.86
14 B2 1060 1006 29.07 0.25 0.75 0.86
15 B2 806 765 10.34 17.82 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12470.7 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 11837.2 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 B2PLYP/6-31G*
ABC
1.00223 0.73175 0.46176

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.860
C2 0.000 0.649 -0.500
C3 0.000 -0.649 -0.500
H4 0.000 1.582 -1.040
H5 0.000 -1.582 -1.040
H6 0.912 0.000 1.461
H7 -0.912 0.000 1.461

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.50761.50762.47272.47271.09181.0918
C21.50761.29761.07782.29492.25842.2584
C31.50761.29762.29491.07782.25842.2584
H42.47271.07782.29493.16353.09683.0968
H52.47272.29491.07783.16353.09683.0968
H61.09182.25842.25843.09683.09681.8232
H71.09182.25842.25843.09683.09681.8232

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.511 C1 C2 H4 145.538
C1 C3 C2 64.511 C1 C3 H5 145.538
C2 C1 C3 50.978 C2 C1 H6 119.786
C2 C1 H7 119.786 C2 C3 H5 149.951
C3 C1 H6 119.786 C3 C1 H7 119.786
C3 C2 H4 149.951 H6 C1 H7 113.222
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.336      
2 C -0.132      
3 C -0.132      
4 H 0.160      
5 H 0.160      
6 H 0.140      
7 H 0.140      


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 -0.506 0.506
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.078 0.000 0.000
y 0.000 -16.716 0.000
z 0.000 0.000 -18.231
Traceless
 xyz
x -1.604 0.000 0.000
y 0.000 1.939 0.000
z 0.000 0.000 -0.335
Polar
3z2-r2-0.669
x2-y2-2.362
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.691 0.000 0.000
y 0.000 4.579 0.000
z 0.000 0.000 4.673


<r2> (average value of r2) Å2
<r2> 36.847
(<r2>)1/2 6.070