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: 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-116.540988
Energy at 298.15K-116.544232
HF Energy-116.540988
Nuclear repulsion energy63.418246
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 3369 3227 0.00 133.61 0.12 0.21
2 A1 3093 2962 54.01 128.06 0.15 0.27
3 A1 1734 1660 9.45 34.00 0.21 0.34
4 A1 1561 1495 1.77 17.77 0.30 0.46
5 A1 1172 1123 0.54 8.43 0.20 0.33
6 A1 943 903 5.66 8.78 0.64 0.78
7 A2 1033 989 0.00 18.70 0.75 0.86
8 A2 880 843 0.00 0.06 0.75 0.86
9 B1 3167 3033 59.20 89.33 0.75 0.86
10 B1 1133 1085 1.39 3.96 0.75 0.86
11 B1 633 606 101.01 1.36 0.75 0.86
12 B2 3317 3177 0.00 69.69 0.75 0.86
13 B2 1124 1076 32.51 0.65 0.75 0.86
14 B2 1067 1022 40.54 0.26 0.75 0.86
15 B2 787 754 13.22 18.63 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12505.8 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 11976.8 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
0.99587 0.71986 0.45572

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 0.870
C2 0.000 0.652 -0.505
C3 0.000 -0.652 -0.505
H4 0.000 1.582 -1.046
H5 0.000 -1.582 -1.046
H6 0.912 0.000 1.468
H7 -0.912 0.000 1.468

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.52201.52202.48412.48411.09111.0911
C21.52201.30441.07502.29822.27002.2700
C31.52201.30442.29821.07502.27002.2700
H42.48411.07502.29823.16303.10713.1071
H52.48412.29821.07503.16303.10713.1071
H61.09112.27002.27003.10713.10711.8244
H71.09112.27002.27003.10713.10711.8244

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.626 C1 C2 H4 145.553
C1 C3 C2 64.626 C1 C3 H5 145.553
C2 C1 C3 50.747 C2 C1 H6 119.714
C2 C1 H7 119.714 C2 C3 H5 149.820
C3 C1 H6 119.714 C3 C1 H7 119.714
C3 C2 H4 149.820 H6 C1 H7 113.460
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 -0.357      
2 C -0.151      
3 C -0.151      
4 H 0.175      
5 H 0.175      
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 -0.484 0.484
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.113 0.000 0.000
y 0.000 -16.722 0.000
z 0.000 0.000 -17.998
Traceless
 xyz
x -1.752 0.000 0.000
y 0.000 1.833 0.000
z 0.000 0.000 -0.081
Polar
3z2-r2-0.162
x2-y2-2.390
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.619 0.000 0.000
y 0.000 4.596 0.000
z 0.000 0.000 4.694


<r2> (average value of r2) Å2
<r2> 37.082
(<r2>)1/2 6.090