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: B2PLYP/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-116.550378
Energy at 298.15K-116.553598
HF Energy-116.390175
Nuclear repulsion energy63.958618
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/cc-pVTZ
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 3321 3186 0.07 148.37 0.15 0.27
2 A1 3074 2949 66.28 145.17 0.14 0.24
3 A1 1713 1643 16.97 40.37 0.15 0.26
4 A1 1534 1472 1.82 14.28 0.20 0.34
5 A1 1159 1112 0.20 13.50 0.14 0.24
6 A1 931 894 4.22 5.47 0.60 0.75
7 A2 1025 984 0.00 6.30 0.75 0.86
8 A2 863 828 0.00 0.18 0.75 0.86
9 B1 3141 3014 41.66 93.85 0.75 0.86
10 B1 1120 1075 1.71 1.29 0.75 0.86
11 B1 599 574 77.21 0.64 0.75 0.86
12 B2 3275 3142 0.17 77.64 0.75 0.86
13 B2 1079 1035 20.21 0.02 0.75 0.86
14 B2 1045 1003 40.41 0.02 0.75 0.86
15 B2 790 758 13.88 15.17 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12334.8 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 11834.0 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 B2PLYP/cc-pVTZ
ABC
1.01181 0.73338 0.46433

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.862
C2 0.000 0.646 -0.500
C3 0.000 -0.646 -0.500
H4 0.000 1.573 -1.039
H5 0.000 -1.573 -1.039
H6 0.911 0.000 1.453
H7 -0.911 0.000 1.453

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.50661.50662.46692.46691.08581.0858
C21.50661.29111.07272.28322.24932.2493
C31.50661.29112.28321.07272.24932.2493
H42.46691.07272.28323.14633.08423.0842
H52.46692.28321.07273.14633.08423.0842
H61.08582.24932.24933.08423.08421.8210
H71.08582.24932.24933.08423.08421.8210

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.630 C1 C2 H4 145.522
C1 C3 C2 64.630 C1 C3 H5 145.522
C2 C1 C3 50.741 C2 C1 H6 119.489
C2 C1 H7 119.489 C2 C3 H5 149.849
C3 C1 H6 119.489 C3 C1 H7 119.489
C3 C2 H4 149.849 H6 C1 H7 113.979
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.221      
2 C -0.142      
3 C -0.142      
4 H 0.149      
5 H 0.149      
6 H 0.103      
7 H 0.103      


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 -0.472 0.472
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.516 0.000 0.000
y 0.000 -16.983 0.000
z 0.000 0.000 -18.683
Traceless
 xyz
x -1.683 0.000 0.000
y 0.000 2.117 0.000
z 0.000 0.000 -0.434
Polar
3z2-r2-0.868
x2-y2-2.534
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.520 0.000 0.000
y 0.000 5.163 0.000
z 0.000 0.000 5.314


<r2> (average value of r2) Å2
<r2> 36.929
(<r2>)1/2 6.077