return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: BLYP/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 BLYP/6-31G*
 hartrees
Energy at 0K-116.556559
Energy at 298.15K-116.559681
HF Energy-116.556559
Nuclear repulsion energy63.209823
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 BLYP/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 3218 3192 1.27 153.43 0.13 0.24
2 A1 2968 2943 75.69 129.42 0.15 0.26
3 A1 1694 1680 12.07 30.20 0.20 0.34
4 A1 1511 1499 5.59 18.41 0.31 0.48
5 A1 1132 1123 1.62 7.93 0.17 0.28
6 A1 906 899 2.12 11.47 0.65 0.79
7 A2 993 985 0.00 17.98 0.75 0.86
8 A2 818 812 0.00 0.05 0.75 0.86
9 B1 3022 2998 67.36 92.51 0.75 0.86
10 B1 1094 1085 1.32 3.98 0.75 0.86
11 B1 575 571 54.74 2.14 0.75 0.86
12 B2 3174 3149 3.51 84.74 0.75 0.86
13 B2 1042 1034 34.87 1.16 0.75 0.86
14 B2 1001 993 25.34 0.51 0.75 0.86
15 B2 755 749 7.56 18.14 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11951.9 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 11855.1 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 BLYP/6-31G*
ABC
0.98899 0.71646 0.45359

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.870
C2 0.000 0.653 -0.506
C3 0.000 -0.653 -0.506
H4 0.000 1.593 -1.052
H5 0.000 -1.593 -1.052
H6 0.920 0.000 1.477
H7 -0.920 0.000 1.477

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.52231.52232.49622.49621.10231.1023
C21.52231.30561.08742.31112.28122.2812
C31.52231.30562.31111.08742.28122.2812
H42.49621.08742.31113.18543.12763.1276
H52.49622.31111.08743.18543.12763.1276
H61.10232.28122.28123.12763.12761.8392
H71.10232.28122.28123.12763.12761.8392

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.607 C1 C2 H4 145.582
C1 C3 C2 64.607 C1 C3 H5 145.582
C2 C1 C3 50.786 C2 C1 H6 119.873
C2 C1 H7 119.873 C2 C3 H5 149.811
C3 C1 H6 119.873 C3 C1 H7 119.873
C3 C2 H4 149.811 H6 C1 H7 113.081
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.297      
2 C -0.086      
3 C -0.086      
4 H 0.116      
5 H 0.116      
6 H 0.118      
7 H 0.118      


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 -0.509 0.509
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.988 0.000 0.000
y 0.000 -16.799 0.000
z 0.000 0.000 -18.239
Traceless
 xyz
x -1.469 0.000 0.000
y 0.000 1.814 0.000
z 0.000 0.000 -0.346
Polar
3z2-r2-0.691
x2-y2-2.189
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.773 0.000 0.000
y 0.000 4.738 0.000
z 0.000 0.000 4.854


<r2> (average value of r2) Å2
<r2> 37.312
(<r2>)1/2 6.108