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All results from a given calculation for CH3CCH (propyne)

using model chemistry: CCSD(T)=FULL/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(T)=FULL/daug-cc-pVTZ
 hartrees
Energy at 0K-116.501143
Energy at 298.15K 
HF Energy-115.909125
Nuclear repulsion energy58.723304
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(T)=FULL/daug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3439 3439        
2 A1 3060 3060        
3 A1 2186 2186        
4 A1 1374 1374        
5 A1 944 944        
6 E 3117 3117        
6 E 3117 3117        
7 E 1495 1495        
7 E 1495 1495        
8 E 1060 1060        
8 E 1060 1060        
9 E 625 625        
9 E 625 625        
10 E 314 314        
10 E 314 314        

Unscaled Zero Point Vibrational Energy (zpe) 12111.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12111.9 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 CCSD(T)=FULL/daug-cc-pVTZ
ABC
5.37958 0.28526 0.28526

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.242
C2 0.000 0.000 0.217
C3 0.000 0.000 1.425
H4 0.000 0.000 2.485
H5 0.000 1.018 -1.629
H6 0.882 -0.509 -1.629
H7 -0.882 -0.509 -1.629

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.45902.66653.72681.08901.08901.0890
C21.45901.20752.26782.10792.10792.1079
C32.66651.20751.06033.21853.21853.2185
H43.72682.26781.06034.23774.23774.2377
H51.08902.10793.21854.23771.76331.7633
H61.08902.10793.21854.23771.76331.7633
H71.08902.10793.21854.23771.76331.7633

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 110.801
C2 C1 H6 110.801 C2 C1 H7 110.801
C2 C3 H4 180.000 H5 C1 H6 108.110
H5 C1 H7 108.110 H6 C1 H7 108.110
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability