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All results from a given calculation for CH3CCH (propyne)

using model chemistry: PM3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at PM3
 hartrees
Energy at 0K 
Energy at 298.15K0.064036
HF Energy0.064036
Nuclear repulsion energy41.157833
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 PM3
Rotational Constants (cm-1) from geometry optimized at PM3
ABC
5.28329 0.29332 0.29332

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM3

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.221
C2 0.000 0.000 0.211
C3 0.000 0.000 1.403
H4 0.000 0.000 2.467
H5 0.000 1.027 -1.608
H6 0.890 -0.514 -1.608
H7 -0.890 -0.514 -1.608

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.43292.62443.68831.09771.09771.0977
C21.43291.19152.25552.08972.08972.0897
C32.62441.19151.06393.18173.18173.1817
H43.68832.25551.06394.20274.20274.2027
H51.09772.08973.18174.20271.77931.7793
H61.09772.08973.18174.20271.77931.7793
H71.09772.08973.18174.20271.77931.7793

picture of propyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 180.000 C2 C1 H5 110.639
C2 C1 H6 110.639 C2 C1 H7 110.639
C2 C3 H4 180.000 H5 C1 H6 108.278
H5 C1 H7 108.278 H6 C1 H7 108.278
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability