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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-116.381867
Energy at 298.15K-116.377628
HF Energy-115.821201
Nuclear repulsion energy64.285419
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 CBS-Q
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3493 3493 0.06 113.20 0.13 0.23
2 A1 3203 3203 88.22 126.94 0.17 0.28
3 A1 1881 1881 18.96 49.49 0.20 0.33
4 A1 1656 1656 5.69 15.02 0.27 0.43
5 A1 1260 1260 0.04 11.08 0.19 0.32
6 A1 1013 1013 2.05 9.34 0.64 0.78
7 A2 1101 1101 0.00 16.12 0.75 0.86
8 A2 974 974 0.00 0.08 0.75 0.86
9 B1 3261 3261 74.83 93.00 0.75 0.86
10 B1 1203 1203 3.82 2.61 0.75 0.86
11 B1 692 692 78.85 1.00 0.75 0.86
12 B2 3441 3441 0.01 64.69 0.75 0.86
13 B2 1184 1184 41.12 0.11 0.75 0.86
14 B2 1155 1155 22.87 0.03 0.75 0.86
15 B2 880 880 16.48 19.96 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13198.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13198.3 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 CBS-Q
ABC
0.98619 0.72699 0.45692

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.856
C2 0.000 0.640 -0.499
C3 0.000 -0.640 -0.499
H4 0.000 1.567 -1.033
H5 0.000 -1.567 -1.033
H6 0.905 0.000 1.456
H7 -0.905 0.000 1.456

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.49821.49822.45462.45461.08581.0858
C21.49821.27941.07052.27082.24702.2470
C31.49821.27942.27081.07052.24702.2470
H42.45461.07052.27083.13483.07733.0773
H52.45462.27081.07053.13483.07733.0773
H61.08582.24702.24703.07733.07731.8103
H71.08582.24702.24703.07733.07731.8103

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.725 C1 C2 H4 145.209
C1 C3 C2 64.725 C1 C3 H5 145.209
C2 C1 C3 50.550 C2 C1 H6 119.965
C2 C1 H7 119.965 C2 C3 H5 150.067
C3 C1 H6 119.965 C3 C1 H7 119.965
C3 C2 H4 150.067 H6 C1 H7 112.943
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability