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All results from a given calculation for CH3CCH (propyne)

using model chemistry: CCD/6-311G**

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/6-311G**
 hartrees
Energy at 0K-116.336559
Energy at 298.15K 
HF Energy-115.894427
Nuclear repulsion energy58.498347
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/6-311G**
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 3502 3344 48.74      
2 A1 3073 2935 17.39      
3 A1 2231 2131 1.16      
4 A1 1444 1379 0.29      
5 A1 949 907 1.29      
6 E 3149 3007 10.74      
6 E 3149 3007 10.74      
7 E 1511 1444 7.20      
7 E 1511 1444 7.20      
8 E 1076 1028 0.05      
8 E 1076 1028 0.05      
9 E 664 635 42.21      
9 E 664 635 42.21      
10 E 318 303 6.73      
10 E 318 303 6.73      

Unscaled Zero Point Vibrational Energy (zpe) 12317.2 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 11764.2 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/6-311G**
ABC
5.30954 0.28303 0.28303

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-311G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.249
C2 0.000 0.000 0.221
C3 0.000 0.000 1.429
H4 0.000 0.000 2.494
H5 0.000 1.025 -1.633
H6 0.887 -0.512 -1.633
H7 -0.887 -0.512 -1.633

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46982.67723.74231.09451.09451.0945
C21.46981.20752.27252.11852.11852.1185
C32.67721.20751.06513.22863.22863.2286
H43.74232.27251.06514.25204.25204.2520
H51.09452.11853.22864.25201.77491.7749
H61.09452.11853.22864.25201.77491.7749
H71.09452.11853.22864.25201.77491.7749

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 110.561
C2 C1 H6 110.561 C2 C1 H7 110.561
C2 C3 H4 180.000 H5 C1 H6 108.360
H5 C1 H7 108.360 H6 C1 H7 108.360
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability