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All results from a given calculation for CH3CCH (propyne)

using model chemistry: QCISD(T)=FULL/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A'
Energy calculated at QCISD(T)=FULL/aug-cc-pVQZ
 hartrees
Energy at 0K-116.562627
Energy at 298.15K 
HF Energy-115.915840
Nuclear repulsion energy58.788102
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 QCISD(T)=FULL/aug-cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)=FULL/aug-cc-pVQZ
ABC
5.37480 0.28597 0.28597

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/aug-cc-pVQZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.241
C2 0.000 0.000 0.217
C3 0.000 0.000 1.423
H4 0.000 0.000 2.483
H5 0.000 1.019 -1.624
H6 0.882 -0.509 -1.624
H7 -0.882 -0.509 -1.624

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45792.66383.72461.08801.08801.0880
C21.45791.20592.26662.10342.10342.1034
C32.66381.20591.06083.21203.21203.2120
H43.72462.26661.06084.23144.23144.2314
H51.08802.10343.21204.23141.76411.7641
H61.08802.10343.21204.23141.76411.7641
H71.08802.10343.21204.23141.76411.7641

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 110.583
C2 C1 H6 110.583 C2 C1 H7 110.583
C2 C3 H4 180.000 H5 C1 H6 108.337
H5 C1 H7 108.337 H6 C1 H7 108.337
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability