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All results from a given calculation for CH3CCH (propyne)

using model chemistry: CCSD/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at CCSD/daug-cc-pVTZ
 hartrees
Energy at 0K-116.419240
Energy at 298.15K 
HF Energy-115.909373
Nuclear repulsion energy58.686278
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 CCSD/daug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCSD/daug-cc-pVTZ
ABC
5.35817 0.28478 0.28478

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.245
C2 0.000 0.000 0.220
C3 0.000 0.000 1.424
H4 0.000 0.000 2.487
H5 0.000 1.020 -1.628
H6 0.883 -0.510 -1.628
H7 -0.883 -0.510 -1.628

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46422.66913.73131.08971.08971.0897
C21.46421.20492.26712.11052.11052.1105
C32.66911.20491.06223.21843.21843.2184
H43.73132.26711.06224.23924.23924.2392
H51.08972.11053.21844.23921.76681.7668
H61.08972.11053.21844.23921.76681.7668
H71.08972.11053.21844.23921.76681.7668

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 110.598
C2 C1 H6 110.598 C2 C1 H7 110.598
C2 C3 H4 180.000 H5 C1 H6 108.322
H5 C1 H7 108.322 H6 C1 H7 108.322
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability