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All results from a given calculation for CH3CCH (propyne)

using model chemistry: CCD/6-31G**

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/6-31G**
 hartrees
Energy at 0K-116.296315
Energy at 298.15K 
HF Energy-115.869971
Nuclear repulsion energy58.534521
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/6-31G**
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 3538 3317 44.00      
2 A1 3124 2929 17.99      
3 A1 2259 2118 0.37      
4 A1 1474 1382 0.77      
5 A1 960 900 1.57      
6 E 3206 3006 12.44      
6 E 3206 3006 12.44      
7 E 1544 1448 5.11      
7 E 1544 1448 5.11      
8 E 1089 1021 0.25      
8 E 1089 1021 0.25      
9 E 587 550 48.75      
9 E 587 550 48.75      
10 E 300 281 1.46      
10 E 300 281 1.46      

Unscaled Zero Point Vibrational Energy (zpe) 12402.9 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 11629.0 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/6-31G**
ABC
5.36995 0.28298 0.28298

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.248
C2 0.000 0.000 0.220
C3 0.000 0.000 1.430
H4 0.000 0.000 2.493
H5 0.000 1.019 -1.634
H6 0.882 -0.509 -1.634
H7 -0.882 -0.509 -1.634

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46792.67823.74101.08951.08951.0895
C21.46791.21022.27312.11512.11512.1151
C32.67821.21021.06283.22873.22873.2287
H43.74102.27311.06284.25054.25054.2505
H51.08952.11513.22874.25051.76491.7649
H61.08952.11513.22874.25051.76491.7649
H71.08952.11513.22874.25051.76491.7649

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 110.724
C2 C1 H6 110.724 C2 C1 H7 110.724
C2 C3 H4 180.000 H5 C1 H6 108.190
H5 C1 H7 108.190 H6 C1 H7 108.190
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability