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All results from a given calculation for CH3CCH (propyne)

using model chemistry: CCD/TZVP

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/TZVP
 hartrees
Energy at 0K-116.343552
Energy at 298.15K 
HF Energy-115.905672
Nuclear repulsion energy58.702719
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/TZVP
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 3517 3334 49.15      
2 A1 3084 2924 18.43      
3 A1 2247 2131 2.09      
4 A1 1453 1378 0.26      
5 A1 948 899 1.21      
6 E 3160 2996 10.49      
6 E 3160 2996 10.49      
7 E 1510 1432 7.31      
7 E 1510 1432 7.31      
8 E 1075 1019 0.08      
8 E 1075 1019 0.08      
9 E 563 533 56.51      
9 E 563 533 56.51      
10 E 192 182 1.09      
10 E 192 182 1.09      

Unscaled Zero Point Vibrational Energy (zpe) 12124.3 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 11493.9 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 CCD/TZVP
ABC
5.35130 0.28498 0.28498

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

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 1.424
H4 0.000 0.000 2.485
H5 0.000 1.021 -1.628
H6 0.884 -0.510 -1.628
H7 -0.884 -0.510 -1.628

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46472.66793.72971.09041.09041.0904
C21.46471.20322.26502.11132.11132.1113
C32.66791.20321.06183.21763.21763.2176
H43.72972.26501.06184.23804.23804.2380
H51.09042.11133.21764.23801.76801.7680
H61.09042.11133.21764.23801.76801.7680
H71.09042.11133.21764.23801.76801.7680

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 110.590
C2 C1 H6 110.590 C2 C1 H7 110.590
C2 C3 H4 180.000 H5 C1 H6 108.329
H5 C1 H7 108.329 H6 C1 H7 108.329
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability