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: B1B95/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-116.524047
Energy at 298.15K-116.527314
HF Energy-116.524047
Nuclear repulsion energy63.606851
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 B1B95/6-31G
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 3389 3232 0.04 130.30 0.12 0.21
2 A1 3116 2971 51.04 125.00 0.15 0.27
3 A1 1749 1668 8.92 34.48 0.20 0.33
4 A1 1568 1495 1.69 17.10 0.32 0.48
5 A1 1187 1132 0.46 8.79 0.20 0.33
6 A1 949 905 5.61 8.76 0.65 0.78
7 A2 1039 991 0.00 18.61 0.75 0.86
8 A2 893 852 0.00 0.02 0.75 0.86
9 B1 3191 3043 56.84 86.80 0.75 0.86
10 B1 1137 1084 1.51 3.87 0.75 0.86
11 B1 643 614 99.23 1.43 0.75 0.86
12 B2 3337 3183 0.10 67.42 0.75 0.86
13 B2 1134 1081 32.07 0.60 0.75 0.86
14 B2 1078 1028 38.53 0.15 0.75 0.86
15 B2 804 766 14.01 18.79 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12606.0 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 12022.4 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 B1B95/6-31G
ABC
1.00100 0.72476 0.45853

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.867
C2 0.000 0.650 -0.504
C3 0.000 -0.650 -0.504
H4 0.000 1.578 -1.042
H5 0.000 -1.578 -1.042
H6 0.910 0.000 1.464
H7 -0.910 0.000 1.464

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.51691.51692.47682.47681.08801.0880
C21.51691.30091.07262.29262.26282.2628
C31.51691.30092.29261.07262.26282.2628
H42.47681.07262.29263.15583.09803.0980
H52.47682.29261.07263.15583.09803.0980
H61.08802.26282.26283.09803.09801.8193
H71.08802.26282.26283.09803.09801.8193

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 145.548
C1 C3 C2 64.607 C1 C3 H5 145.548
C2 C1 C3 50.785 C2 C1 H6 119.709
C2 C1 H7 119.709 C2 C3 H5 149.845
C3 C1 H6 119.709 C3 C1 H7 119.709
C3 C2 H4 149.845 H6 C1 H7 113.459
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.347      
2 C -0.147      
3 C -0.147      
4 H 0.169      
5 H 0.169      
6 H 0.151      
7 H 0.151      


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 -19.093 0.000 0.000
y 0.000 -16.740 0.000
z 0.000 0.000 -18.022
Traceless
 xyz
x -1.712 0.000 0.000
y 0.000 1.817 0.000
z 0.000 0.000 -0.105
Polar
3z2-r2-0.210
x2-y2-2.353
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.598 0.000 0.000
y 0.000 4.559 0.000
z 0.000 0.000 4.652


<r2> (average value of r2) Å2
<r2> 36.932
(<r2>)1/2 6.077