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All results from a given calculation for CH3CCH (propyne)

using model chemistry: MP4/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 MP4/daug-cc-pVTZ
 hartrees
Energy at 0K-116.446182
Energy at 298.15K 
HF Energy-115.907888
Nuclear repulsion energy58.443590
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 MP4/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 3450 3450        
2 A1 3042 3042        
3 A1 2125 2125        
4 A1 1410 1410        
5 A1 934 934        
6 E 3120 3120        
6 E 3120 3120        
7 E 1492 1492        
7 E 1492 1492        
8 E 1057 1057        
8 E 1057 1057        
9 E 620 620        
9 E 620 620        
10 E 313 313        
10 E 313 313        

Unscaled Zero Point Vibrational Energy (zpe) 12082.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12082.7 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 MP4/daug-cc-pVTZ
ABC
5.33922 0.28246 0.28246

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/daug-cc-pVTZ

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 0.216
C3 0.000 0.000 1.433
H4 0.000 0.000 2.497
H5 0.000 1.022 -1.633
H6 0.885 -0.511 -1.633
H7 -0.885 -0.511 -1.633

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.46492.68133.74541.09181.09181.0918
C21.46491.21642.28062.11282.11282.1128
C32.68131.21641.06423.23153.23153.2315
H43.74542.28061.06424.25444.25444.2544
H51.09182.11283.23154.25441.77001.7700
H61.09182.11283.23154.25441.77001.7700
H71.09182.11283.23154.25441.77001.7700

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 110.614
C2 C1 H6 110.614 C2 C1 H7 110.614
C2 C3 H4 180.000 H5 C1 H6 108.305
H5 C1 H7 108.305 H6 C1 H7 108.305
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability