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All results from a given calculation for CH3CCH (propyne)

using model chemistry: CCD/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at CCD/Def2TZVPP
 hartrees
Energy at 0K-116.410459
Energy at 298.15K 
HF Energy-115.912053
Nuclear repulsion energy58.740596
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 CCD/Def2TZVPP
Rotational Constants (cm-1) from geometry optimized at CCD/Def2TZVPP
ABC
5.36709 0.28527 0.28527

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/Def2TZVPP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.244
C2 0.000 0.000 0.220
C3 0.000 0.000 1.423
H4 0.000 0.000 2.485
H5 0.000 1.019 -1.627
H6 0.883 -0.510 -1.627
H7 -0.883 -0.510 -1.627

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46392.66663.72831.08891.08891.0889
C21.46391.20272.26432.10962.10962.1096
C32.66661.20271.06163.21553.21553.2155
H43.72832.26431.06164.23584.23584.2358
H51.08892.10963.21554.23581.76541.7654
H61.08892.10963.21554.23581.76541.7654
H71.08892.10963.21554.23581.76541.7654

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 110.599
C2 C1 H6 110.599 C2 C1 H7 110.599
C2 C3 H4 180.000 H5 C1 H6 108.320
H5 C1 H7 108.320 H6 C1 H7 108.320
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability