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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: B2PLYP=FULL/3-21G

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=FULL/3-21G
 hartrees
Energy at 0K-115.784927
Energy at 298.15K-115.788162
HF Energy-115.691241
Nuclear repulsion energy63.231658
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=FULL/3-21G
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 3370 3209 0.25 114.09 0.12 0.21
2 A1 3135 2984 35.38 99.82 0.15 0.26
3 A1 1689 1608 11.41 22.07 0.27 0.42
4 A1 1577 1501 0.84 16.28 0.30 0.46
5 A1 1125 1071 1.19 6.15 0.15 0.27
6 A1 936 891 2.74 11.78 0.55 0.71
7 A2 1049 999 0.00 19.22 0.75 0.86
8 A2 893 851 0.00 0.08 0.75 0.86
9 B1 3216 3061 38.83 70.45 0.75 0.86
10 B1 1129 1075 2.51 4.00 0.75 0.86
11 B1 650 618 97.55 1.36 0.75 0.86
12 B2 3321 3161 0.15 61.77 0.75 0.86
13 B2 1117 1063 7.90 0.09 0.75 0.86
14 B2 1085 1033 67.23 1.06 0.75 0.86
15 B2 723 689 7.84 16.98 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12506.8 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 11906.4 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 B2PLYP=FULL/3-21G
ABC
0.99911 0.70764 0.45182

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.883
C2 0.000 0.652 -0.510
C3 0.000 -0.652 -0.510
H4 0.000 1.573 -1.054
H5 0.000 -1.573 -1.054
H6 0.916 0.000 1.464
H7 -0.916 0.000 1.464

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.53751.53752.49532.49531.08481.0848
C21.53751.30351.07002.29022.27122.2712
C31.53751.30352.29021.07002.27122.2712
H42.49531.07002.29023.14563.10703.1070
H52.49532.29021.07003.14563.10703.1070
H61.08482.27122.27123.10703.10701.8325
H71.08482.27122.27123.10703.10701.8325

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.919 C1 C2 H4 145.677
C1 C3 C2 64.919 C1 C3 H5 145.677
C2 C1 C3 50.161 C2 C1 H6 119.005
C2 C1 H7 119.005 C2 C3 H5 149.404
C3 C1 H6 119.005 C3 C1 H7 119.005
C3 C2 H4 149.404 H6 C1 H7 115.264
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability